D e s i g n o f

Steel Deck DiaphragmsD e s i g n o f

Steel Deck Diaphragms

C A N A D I A N S H E E T S T E E L B U I L D I N G I N S T I T U T E

4 th Edition - Imperial

CSSBI B13-19 May 2019

CANADIAN SHEET STEEL BUILDING INSTITUTE • www.cssbi.ca • info@cssbi.ca • (519) 650-1285

CSSBI Steel Deck Manufacturers

Design of Steel Deck Diaphragms 4th Edition

CSSBI B13-19

Preface

One of the objectives of the Canadian Sheet Steel Building Institute is the development of design criteria that promote safety, performance and good practice. This bulletin is published as an aid to designers and building officials. It offers a practical approach to the design of steel deck diaphragms consisting of steel roof or floor deck supported by a steel structure. Such construction is capable of providing an efficient diaphragm to resist lateral forces when all components are suitably interconnected. The material contained herein has been prepared for the general information of the reader. While the material is believed to be technically correct and in accordance with recognized practice at the time of publication, it does not obviate the need to determine its suitability for a given application. Neither the Canadian Sheet Steel Building Institute nor its Members warrant or assume and liability for the suitability of this material for any general or particular application.

Copyright © May 2019

CANADIAN SHEET STEEL BUILDING INSTITUTE

All rights reserved. This publication, nor any part thereof, may not be reproduced in any form without the

written permission of the publisher.

Canadian Sheet Steel Building Institute

CSSBI B13-2019: Design of Steel Deck Diaphragms

1 Diaphragm Design Method

The tables presented in this bulletin were developed using the design method in AISI S310-16, North American Standard for the Design of Profiled Steel Diaphragm Panels. The AISI S310 standard is adopted by reference in CSA-S136-16 North American Specification for the Design of Cold-Formed Steel Structural Members, which governs the design of cold formed steel products in Canada. The tables provide the nominal resistance and stiffness values. The LSD resistance factors shown below are taken from Table B1.1 of AISI S310-16.

Load Type or Combinations

Including

Connection Type

Limit State

Connection- Related

Panel Buckling1

ϕd ϕd

Wind Welds 0.60

0.75 Screws 0.75 Seismic and All Others

Welds 0.40 Screws 0.55

1. Panel buckling is out of plane buckling and not local buckling at fasteners.

2 Summary of Design Parameters

It is important to note that the deck profiles shown are representative of products available in Canada; products from specific manufacturers may differ. The manufacturer should be contacted for the design values applicable to their products

2.1 Deck Profiles and Fastener Patterns

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Canadian Sheet Steel Building Institute

CSSBI B13-2019: Design of Steel Deck Diaphragms

1-1/2” Deck, 36” Coverage, 6” Flute Spacing

Design Thickness Depth Pitch Panel Width Moment of Inertia

mm in. mm in. mm in. mm in. mm4 x 106/m in4/ft.

0.759 0.0299 38 1.50 152 6.0 914 36 0.223 0.163 0.912 0.0359 38 1.50 152 6.0 914 36 0.278 0.204 1.214 0.0478 38 1.50 152 6.0 914 36 0.382 0.280 1.519 0.0598 38 1.50 152 6.0 914 36 0.476 0.349

3” Deck, 24” Coverage, 6” Flute Spacing

Design Thickness Depth Pitch Panel Width Moment of Inertia

mm in. mm in. mm in. mm in. mm4 x 106/m in4/ft)

0.759 0.0299 76 3 152 6 610 24 1.25 0.917 0.912 0.0359 76 3 152 6 610 24 1.50 1.10 1.214 0.0478 76 3 152 6 610 24 1.99 1.46 1.519 0.0598 76 3 152 6 610 24 2.49 1.82

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Canadian Sheet Steel Building Institute

CSSBI B13-2019: Design of Steel Deck Diaphragms

3” Deck, 32” Coverage, 8” Flute Spacing

Design Thickness Depth Pitch Panel Width Moment of Inertia, Ixg

mm in. mm in. mm in. mm in. mm4 x 106/m in4/ft.

0.759 0.0299 76 3 203 8 813 32 1.14 0.838 0.912 0.0359 76 3 203 8 813 32 1.37 1.00 1.214 0.0478 76 3 203 8 813 32 1.82 1.33 1.519 0.0598 76 3 203 8 813 32 2.27 1.66

2.2 Deck Profile Geometry

Product Dd f e d w

mm in. mm in. mm in. mm in. mm in.

150-6 38 1.5 82.6 3.25 22.2 0.875 152 6 38.9 1.53 300-6 76 3.0 72.9 2.87 27.7 1.09 152 6 77.2 3.04 300-8 76 3.0 124 4.87 27.7 1.09 203 8 77.2 3.04

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Canadian Sheet Steel Building Institute

CSSBI B13-2019: Design of Steel Deck Diaphragms

2.3 Steel Deck Mechanical Properties

Design Yield Stress, Fy

Design Tensile Stress, Fu

Design Thickness, t

MPa ksi MPa ksi mm in.

230 33 310 45

0.759 0.0299 0.912 0.0359 1.214 0.0478 1.519 0.0598

2.4 Fasteners

Screws:

Size Diameter Shear Strength, Pnss

mm In. kN kips

#10 4.826 0.190 6.49 1.46 #12 5.334 0.210 9.34 2.10

Deck

Thickness in.

Side-Lap Fastener Shear Strength, Qs Side-Lap Fastener Stiffness, Ss

#10 #12 #10 #12

kN kips kN kips mm/kN in/kips mm/kN in/kips

0.0299 1.89 0.426 1.99 0.448 0.0991 0.0173 0.0991 0.0173 0.0359 2.49 0.560 2.62 0.589 0.0905 0.0158 0.0905 0.0158 0.0478 3.83 0.861 4.03 0.905 0.0784 0.0137 0.0784 0.0137 0.0598 5.36 1.21 5.63 1.27 0.0701 0.0123 0.0701 0.0123

Deck

Thickness in.

Frame Fastener Shear Strength, Qf Frame Fastener Stiffness, Sf

#10 #12 #10 #12

kN kips kN kips mm/kN in/kips mm/kN in/kips

0.0299 3.07 0.690 3.39 0.763 0.0430 0.0075 0.0430 0.0075 0.0359 3.68 0.829 4.07 0.916 0.0392 0.0069 0.0392 0.0069 0.0478 4.90 1.103 5.42 1.220 0.0340 0.0059 0.0340 0.0059 0.0598 6.14 1.380 6.78 1.526 0.0304 0.0053 0.0304 0.0053

Welds: Fxx = 70 ksi (480 MPa) Weld diameter 0.75 in. (19 mm)

Deck

Thickness in.

Shear Strength, Qf Stiffness, Sf

kN kips mm/kN in/kips

0.0299 8.36 1.88 0.0380 0.0067 0.0359 11.3 2.54 0.0347 0.0061 0.0478 14.8 3.32 0.0301 0.0053 0.0598 18.2 4.09 0.0269 0.0047

Note: Shear strength based on the 1-ply condition.

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Canadian Sheet Steel Building Institute

CSSBI B13-2019: Design of Steel Deck Diaphragms

Side lap arc seam welds: Fxx = 70 ksi (480 MPa) Weld length 1.5 in. (38 mm)

Deck

Thickness in.

Shear Strength, Qs Stiffness, Ss kN kips mm/kN in/kips

0.0299 9.70 2.18 0.0370 0.0065 0.0359 12.4 2.78 0.0338 0.0059 0.0478 18.1 4.07 0.0293 0.0051 0.0598 24.4 5.48 0.0262 0.0046

Button punch side lap connectors:

Deck Thickness

in.

Shear Strength, Qs Stiffness, Ss

kN kips mm/kN in/kips

0.0299 0.445 0.100 0.991 0.173 0.0359 0.445 0.100 0.905 0.158 0.0478 0.445 0.100 0.784 0.137 0.0598 0.445 0.100 0.701 0.123

3 Notes to Tables

• The tables list the nominal (unfactored) strength and stiffness of the diaphragm based on a 3-span condition. Values are conservative for longer sheet lengths and more spans.

• The tables only consider the resistance of the diaphragm controlled by connections at interior panels or edge panels (Sni) or controlled by support connections at the corners of interior panels or edge panels (Snc). The resistance of the diaphragm (Sne) controlled by connections along the edge parallel to the panel span in an edge panel and located at a diaphragm reaction line are not considered. The structural engineer is responsible for designing these connections.

• Frame fastener screws are connected into a steel supporting structure at least 2.5 times the deck thickness.

4 Acoustic Deck

The common acoustic deck products made in Canada only have perforations in the web elements, not the top or bottom flats. Since there are no perforations that would affect the capacity of the support or side-lap connections, the strength of the diaphragm is not affected. However, the perforations might reduce the stiffness of the diaphragm and this effect can be calculated using the AISI S310 standard. For most practical purposes the reduction is stiffness is not significant (i.e. < 10%).

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Canadian Sheet Steel Building Institute

CSSBI B13-2019: Design of Steel Deck Diaphragms

5 Load Table Index

Deck Type

Support Connection

Side Lap Connection

Page(s)

1-1/2 in. deep 6 in. flute spacing 36 in. panel width

#12 Screw Button punch 7 - 10 #10 Screw 11 - 14

3/4 in. arc spot weld

1-1/2 in. arc seam weld 15 - 18 Button punch 19 - 22 #10 Screw 23 - 26

3 in. deep 6 in. flute spacing 24 in. panel width

#12 Screw Button punch 27 - 30 #10 Screw 31 - 34

3/4 in. arc spot weld

1-1/2 in. arc seam weld 35 - 38 Button punch 39 - 42 #10 Screw 43 - 46

3 in. deep 8 in. flute spacing 32 in. panel width

#12 Screw Button punch 47 - 50 #10 Screw 51 - 54

3/4 in. arc spot weld

1-1/2 in. arc seam weld 55 - 58 Button punch 59 - 62 #10 Screw 63 - 66

1-1/2 in. deep 6 in. flute spacing 36 in. panel width 2 in. concrete cover

3/4 in. arc spot weld Button punch 67 - 70

3 in. deep 6 in. flute spacing 24 in. panel width 2 in. concrete cover

3/4 in. arc spot weld Button punch 71 - 74

3 in. deep 8 in. flute spacing 32 in. panel width 2 in. concrete cover

3/4 in. arc spot weld Button punch 75 - 78

6

Design Thickness 0.0299 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.338 0.301 0.272 0.244 0.221 0.202 0.187 0.173 0.162Stiffness, G' (kip/in) 9.77 11.0 12.1 13.1 14.0 14.7 15.4 15.9 16.4Strength (kips/ft) 0.350 0.314 0.285 0.261 0.238 0.219 0.203 0.190 0.179Stiffness, G' (kip/in) 9.79 11.0 12.2 13.2 14.1 14.9 15.5 16.1 16.6Strength (kips/ft) 0.361 0.326 0.298 0.276 0.254 0.236 0.220 0.207 0.195Stiffness, G' (kip/in) 9.81 11.1 12.2 13.2 14.2 15.0 15.7 16.3 16.9Strength (kips/ft) 0.383 0.350 0.324 0.302 0.284 0.269 0.253 0.240 0.229Stiffness, G' (kip/in) 9.8 11.1 12.3 13.4 14.3 15.2 16.0 16.7 17.3Strength (kips/ft) 0.404 0.373 0.348 0.327 0.310 0.296 0.283 0.273 0.262Stiffness, G' (kip/in) 9.87 11.2 12.4 13.5 14.5 15.4 16.2 17.0 17.7Strength (kips/ft) 0.443 0.415 0.392 0.374 0.358 0.345 0.334 0.324 0.316Stiffness, G' (kip/in) 9.93 11.3 12.5 13.7 14.8 15.8 16.7 17.5 18.3Strength (kips/ft) 0.441 0.392 0.352 0.319 0.289 0.264 0.243 0.226 0.211Stiffness, G' (kip/in) 13.6 15.2 16.6 17.9 19.0 19.9 20.6 21.3 21.8Strength (kips/ft) 0.453 0.405 0.366 0.335 0.305 0.281 0.260 0.242 0.227Stiffness, G' (kip/in) 13.6 15.2 16.7 18.0 19.1 20.0 20.8 21.5 22.1Strength (kips/ft) 0.465 0.418 0.379 0.349 0.322 0.297 0.276 0.259 0.244Stiffness, G' (kip/in) 13.6 15.3 16.8 18.1 19.2 20.2 21.0 21.7 22.3Strength (kips/ft) 0.488 0.442 0.406 0.376 0.351 0.330 0.310 0.292 0.277Stiffness, G' (kip/in) 13.7 15.4 16.9 18.2 19.4 20.5 21.4 22.2 22.9Strength (kips/ft) 0.510 0.466 0.431 0.402 0.378 0.358 0.341 0.326 0.311Stiffness, G' (kip/in) 13.7 15.4 17.0 18.4 19.6 20.7 21.7 22.6 23.3Strength (kips/ft) 0.55 0.51 0.48 0.45 0.43 0.41 0.39 0.38 0.37Stiffness, G' (kip/in) 13.8 15.5 17.2 18.6 20.0 21.2 22.3 23.3 24.1Strength (kips/ft) 0.498 0.438 0.386 0.344 0.311 0.284 0.262 0.243 0.227Stiffness, G' (kip/in) 53.8 54.9 55.1 54.7 53.9 52.8 51.6 50.3 49.0Strength (kips/ft) 0.512 0.452 0.402 0.361 0.328 0.301 0.279 0.260 0.243Stiffness, G' (kip/in) 54.1 55.3 55.6 55.3 54.6 53.6 52.5 51.3 50.1Strength (kips/ft) 0.526 0.467 0.419 0.378 0.345 0.318 0.295 0.276 0.260Stiffness, G' (kip/in) 54.3 55.7 56.1 55.9 55.3 54.4 53.4 52.3 51.1Strength (kips/ft) 0.554 0.495 0.450 0.411 0.378 0.351 0.329 0.310 0.293Stiffness, G' (kip/in) 54.8 56.4 57.0 57.0 56.6 55.9 55.1 54.1 53.1Strength (kips/ft) 0.580 0.523 0.478 0.443 0.411 0.384 0.362 0.343 0.327Stiffness, G' (kip/in) 55.3 57.0 57.8 58.1 57.9 57.4 56.7 55.9 55.1Strength (kips/ft) 0.632 0.577 0.534 0.500 0.472 0.449 0.429 0.410 0.393Stiffness, G' (kip/in) 56.2 58.3 59.4 60.0 60.2 60.0 59.7 59.2 58.6Strength (kips/ft) 0.797 0.702 0.626 0.566 0.515 0.469 0.432 0.399 0.372Stiffness, G' (kip/in) 59.9 62.4 63.8 64.4 64.4 64.0 63.3 62.3 61.2Strength (kips/ft) 0.810 0.715 0.641 0.580 0.531 0.486 0.448 0.416 0.389Stiffness, G' (kip/in) 60.0 62.6 64.1 64.8 64.9 64.5 63.9 63.0 62.0Strength (kips/ft) 0.823 0.729 0.655 0.595 0.546 0.503 0.465 0.433 0.405Stiffness, G' (kip/in) 60.2 62.8 64.4 65.1 65.3 65.0 64.5 63.7 62.8Strength (kips/ft) 0.848 0.756 0.683 0.624 0.575 0.535 0.498 0.466 0.439Stiffness, G' (kip/in) 60.4 63.2 64.9 65.8 66.2 66.1 65.6 65.0 64.2Strength (kips/ft) 0.873 0.782 0.710 0.652 0.605 0.565 0.531 0.499 0.472Stiffness, G' (kip/in) 60.7 63.6 65.5 66.5 67.0 67.0 66.8 66.3 65.6Strength (kips/ft) 0.921 0.834 0.764 0.708 0.662 0.623 0.590 0.562 0.537Stiffness, G' (kip/in) 61.2 64.4 66.5 67.8 68.5 68.9 68.9 68.6 68.2

Nominal Shear Strength due to Panel Buckling (kips/ft)

3 3.5 4 4.5 5 5.5 6 6.5 715.02 11.04 8.45 6.68 5.41 4.47 3.76 3.20 2.76

Span (ft)

3 3.5 4 4.5 5 5.5 6 6.5 7

36/4

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/7

36

24

18

12

9

6

Span (ft)

36/9

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

7

Design Thickness 0.0359 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.325 0.293 0.265 0.242 0.223 0.207 0.193 0.181 0.170Stiffness, G' (kip/in) 17.8 19.0 20.0 20.9 21.5 22.0 22.4 22.7 22.9Strength (kips/ft) 0.338 0.309 0.281 0.258 0.239 0.223 0.209 0.197 0.187Stiffness, G' (kip/in) 17.9 19.2 20.2 21.1 21.8 22.4 22.9 23.2 23.5Strength (kips/ft) 0.352 0.324 0.298 0.275 0.256 0.240 0.226 0.214 0.204Stiffness, G' (kip/in) 18.0 19.3 20.4 21.3 22.1 22.7 23.3 23.7 24.0Strength (kips/ft) 0.377 0.350 0.328 0.308 0.289 0.273 0.259 0.247 0.237Stiffness, G' (kip/in) 18.2 19.6 20.7 21.8 22.6 23.4 24.0 24.6 25.0Strength (kips/ft) 0.402 0.376 0.355 0.337 0.321 0.307 0.293 0.281 0.270Stiffness, G' (kip/in) 18.4 19.8 21.0 22.1 23.1 24.0 24.7 25.3 25.9Strength (kips/ft) 0.448 0.425 0.405 0.388 0.374 0.361 0.351 0.341 0.333Stiffness, G' (kip/in) 18.6 20.2 21.6 22.8 23.9 24.9 25.8 26.6 27.4Strength (kips/ft) 0.422 0.383 0.346 0.316 0.291 0.269 0.251 0.235 0.221Stiffness, G' (kip/in) 24.2 25.7 26.9 27.8 28.5 29.0 29.3 29.6 29.7Strength (kips/ft) 0.435 0.397 0.363 0.332 0.307 0.286 0.268 0.252 0.238Stiffness, G' (kip/in) 24.3 25.8 27.1 28.1 28.8 29.4 29.8 30.1 30.3Strength (kips/ft) 0.449 0.411 0.379 0.349 0.324 0.303 0.284 0.268 0.255Stiffness, G' (kip/in) 24.4 26.0 27.3 28.3 29.2 29.8 30.3 30.7 30.9Strength (kips/ft) 0.475 0.438 0.408 0.382 0.357 0.336 0.318 0.302 0.288Stiffness, G' (kip/in) 24.7 26.3 27.7 28.8 29.8 30.6 31.2 31.7 32.1Strength (kips/ft) 0.501 0.465 0.436 0.411 0.389 0.369 0.351 0.335 0.321Stiffness, G' (kip/in) 24.9 26.6 28.1 29.3 30.4 31.3 32.0 32.6 33.1Strength (kips/ft) 0.550 0.516 0.488 0.465 0.445 0.427 0.412 0.399 0.387Stiffness, G' (kip/in) 25.2 27.1 28.7 30.1 31.4 32.5 33.4 34.2 34.9Strength (kips/ft) 0.463 0.413 0.373 0.340 0.313 0.290 0.270 0.253 0.238Stiffness, G' (kip/in) 69.7 68.1 66.2 64.2 62.1 60.0 58.0 56.1 54.2Strength (kips/ft) 0.480 0.430 0.390 0.357 0.330 0.307 0.287 0.270 0.255Stiffness, G' (kip/in) 70.4 68.9 67.2 65.2 63.3 61.3 59.4 57.5 55.8Strength (kips/ft) 0.496 0.446 0.406 0.374 0.346 0.323 0.304 0.287 0.272Stiffness, G' (kip/in) 71.1 69.8 68.1 66.3 64.4 62.6 60.7 59.0 57.3Strength (kips/ft) 0.527 0.480 0.440 0.407 0.380 0.357 0.337 0.320 0.305Stiffness, G' (kip/in) 72.4 71.3 69.9 68.4 66.7 65.0 63.4 61.8 60.2Strength (kips/ft) 0.556 0.512 0.473 0.440 0.413 0.390 0.370 0.353 0.338Stiffness, G' (kip/in) 73.7 72.8 71.7 70.3 68.8 67.4 65.9 64.4 63.0Strength (kips/ft) 0.613 0.570 0.536 0.507 0.480 0.457 0.437 0.420 0.405Stiffness, G' (kip/in) 76.0 75.7 74.9 74.0 72.9 71.7 70.5 69.4 68.2Strength (kips/ft) 0.750 0.677 0.617 0.562 0.517 0.478 0.445 0.416 0.391Stiffness, G' (kip/in) 82.6 82.1 81.0 79.5 77.8 75.9 74.0 72.1 70.1Strength (kips/ft) 0.765 0.692 0.632 0.579 0.533 0.495 0.461 0.433 0.407Stiffness, G' (kip/in) 83.1 82.7 81.7 80.3 78.6 76.9 75.0 73.2 71.3Strength (kips/ft) 0.779 0.706 0.647 0.596 0.550 0.511 0.478 0.449 0.424Stiffness, G' (kip/in) 83.5 83.2 82.3 81.0 79.5 77.8 76.0 74.3 72.5Strength (kips/ft) 0.807 0.736 0.677 0.628 0.583 0.545 0.511 0.483 0.457Stiffness, G' (kip/in) 84.3 84.2 83.5 82.4 81.1 79.6 78.0 76.4 74.8Strength (kips/ft) 0.835 0.764 0.706 0.657 0.616 0.578 0.545 0.516 0.491Stiffness, G' (kip/in) 85.2 85.2 84.7 83.8 82.7 81.3 79.9 78.4 77.0Strength (kips/ft) 0.890 0.821 0.764 0.716 0.676 0.641 0.611 0.583 0.557Stiffness, G' (kip/in) 86.7 87.2 87.0 86.4 85.6 84.6 83.5 82.3 81.1

Nominal Shear Strength due to Panel Buckling (kips/ft)

4 4.5 5 5.5 6 6.5 7 7.5 811.47 9.060 7.339 6.065 5.096 4.343 3.744 3.262 2.867

Span (ft)

4 4.5 5 5.5 6 6.5 7 7.5 8

36/4

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/7

36

24

18

12

9

6

Span (ft)

36/9

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

8

Design Thickness 0.0478 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.351 0.320 0.295 0.273 0.254 0.238 0.223 0.211 0.200Stiffness, G' (kip/in) 33.4 34.0 34.3 34.4 34.4 34.3 34.0 33.7 33.3Strength (kips/ft) 0.368 0.337 0.311 0.289 0.271 0.254 0.240 0.228 0.216Stiffness, G' (kip/in) 33.8 34.5 35.0 35.2 35.3 35.3 35.1 34.9 34.6Strength (kips/ft) 0.385 0.354 0.328 0.306 0.287 0.271 0.257 0.244 0.233Stiffness, G' (kip/in) 34.3 35.1 35.6 36.0 36.2 36.2 36.2 36.0 35.9Strength (kips/ft) 0.415 0.387 0.361 0.339 0.321 0.304 0.290 0.278 0.266Stiffness, G' (kip/in) 35.1 36.1 36.8 37.4 37.8 38.0 38.1 38.2 38.2Strength (kips/ft) 0.442 0.417 0.395 0.373 0.354 0.338 0.323 0.311 0.300Stiffness, G' (kip/in) 35.8 37.0 37.9 38.7 39.2 39.6 39.9 40.2 40.3Strength (kips/ft) 0.495 0.471 0.450 0.433 0.417 0.404 0.390 0.378 0.366Stiffness, G' (kip/in) 37.1 38.6 39.8 40.9 41.7 42.5 43.1 43.6 44.0Strength (kips/ft) 0.460 0.419 0.385 0.356 0.331 0.310 0.291 0.275 0.260Stiffness, G' (kip/in) 43.7 44.2 44.4 44.3 44.1 43.7 43.1 42.5 41.9Strength (kips/ft) 0.477 0.436 0.402 0.373 0.348 0.327 0.308 0.291 0.277Stiffness, G' (kip/in) 44.3 44.9 45.2 45.2 45.0 44.7 44.3 43.8 43.3Strength (kips/ft) 0.492 0.452 0.418 0.389 0.365 0.343 0.325 0.308 0.293Stiffness, G' (kip/in) 44.8 45.5 45.9 46.0 46.0 45.8 45.5 45.1 44.6Strength (kips/ft) 0.521 0.486 0.452 0.423 0.398 0.377 0.358 0.341 0.327Stiffness, G' (kip/in) 45.7 46.6 47.2 47.6 47.7 47.8 47.6 47.4 47.2Strength (kips/ft) 0.549 0.514 0.485 0.456 0.431 0.410 0.391 0.375 0.360Stiffness, G' (kip/in) 46.6 47.7 48.5 49.0 49.4 49.6 49.6 49.6 49.5Strength (kips/ft) 0.603 0.570 0.542 0.518 0.496 0.477 0.458 0.441 0.427Stiffness, G' (kip/in) 48.2 49.6 50.7 51.6 52.3 52.8 53.2 53.5 53.7Strength (kips/ft) 0.496 0.452 0.415 0.378 0.357 0.334 0.314 0.296 0.280Stiffness, G' (kip/in) 87.6 83.7 80.0 75.9 73.3 70.3 67.6 65.0 62.6Strength (kips/ft) 0.513 0.468 0.432 0.395 0.374 0.351 0.330 0.313 0.297Stiffness, G' (kip/in) 89.0 85.3 81.7 77.7 75.2 72.3 69.7 67.2 64.9Strength (kips/ft) 0.529 0.485 0.448 0.412 0.391 0.367 0.347 0.329 0.313Stiffness, G' (kip/in) 90.5 86.8 83.4 79.5 77.1 74.3 71.7 69.3 67.1Strength (kips/ft) 0.563 0.518 0.482 0.445 0.424 0.401 0.380 0.363 0.347Stiffness, G' (kip/in) 93.3 89.9 86.7 83.1 80.8 78.2 75.7 73.4 71.3Strength (kips/ft) 0.596 0.552 0.515 0.478 0.457 0.434 0.414 0.396 0.380Stiffness, G' (kip/in) 96.0 92.8 89.8 86.5 84.3 81.9 79.6 77.4 75.4Strength (kips/ft) 0.660 0.618 0.582 0.545 0.524 0.501 0.480 0.463 0.447Stiffness, G' (kip/in) 101.1 98.4 95.8 92.9 91.0 88.9 86.9 85.0 83.2Strength (kips/ft) 0.817 0.747 0.686 0.634 0.589 0.551 0.517 0.487 0.461Stiffness, G' (kip/in) 110.8 107.0 103.2 99.6 96.1 92.7 89.5 86.5 83.7Strength (kips/ft) 0.832 0.764 0.703 0.651 0.606 0.568 0.534 0.504 0.477Stiffness, G' (kip/in) 111.8 108.2 104.5 101.0 97.6 94.3 91.2 88.3 85.5Strength (kips/ft) 0.847 0.781 0.719 0.667 0.623 0.584 0.550 0.521 0.494Stiffness, G' (kip/in) 112.9 109.3 105.8 102.4 99.1 95.9 92.9 90.0 87.3Strength (kips/ft) 0.877 0.811 0.753 0.701 0.656 0.618 0.584 0.554 0.527Stiffness, G' (kip/in) 114.9 111.6 108.3 105.1 102.0 99.0 96.1 93.4 90.9Strength (kips/ft) 0.907 0.841 0.785 0.734 0.689 0.651 0.617 0.587 0.561Stiffness, G' (kip/in) 116.9 113.8 110.7 107.7 104.8 102.0 99.3 96.7 94.3Strength (kips/ft) 0.966 0.901 0.846 0.799 0.756 0.718 0.684 0.654 0.627Stiffness, G' (kip/in) 120.6 118.0 115.4 112.7 110.1 107.6 105.2 103.0 100.8

Nominal Shear Strength due to Panel Buckling (kips/ft)

5 5.5 6 6.5 7 7.5 8 8.5 911.5 9.53 8.01 6.83 5.89 5.13 4.51 3.99 3.56

36/4

36

24

12

9

6

18

Span (ft)

5 5.5 6 6.5 7 7.5 8 8.5 9

36/5

36

24

12

9

6

18

36/7

36

24

12

9

6

18

Span (ft)

36/9

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

9

Design Thickness 0.0598 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.367 0.340 0.316 0.295 0.277 0.262 0.247 0.235 0.223Stiffness, G' (kip/in) 46.9 46.3 45.7 44.9 44.1 43.2 42.3 41.4 40.6Strength (kips/ft) 0.384 0.356 0.333 0.312 0.294 0.278 0.264 0.251 0.240Stiffness, G' (kip/in) 48.0 47.6 47.1 46.5 45.8 45.0 44.2 43.5 42.7Strength (kips/ft) 0.401 0.373 0.349 0.329 0.311 0.295 0.281 0.268 0.257Stiffness, G' (kip/in) 49.1 48.9 48.5 48.0 47.4 46.7 46.1 45.4 44.7Strength (kips/ft) 0.434 0.406 0.383 0.362 0.344 0.328 0.314 0.301 0.290Stiffness, G' (kip/in) 51.2 51.2 51.0 50.8 50.4 50.0 49.5 49.0 48.5Strength (kips/ft) 0.467 0.440 0.416 0.395 0.377 0.362 0.347 0.335 0.323Stiffness, G' (kip/in) 53.1 53.3 53.4 53.4 53.2 53.0 52.7 52.4 52.1Strength (kips/ft) 0.526 0.503 0.483 0.462 0.444 0.428 0.414 0.401 0.390Stiffness, G' (kip/in) 56.4 57.2 57.7 58.1 58.3 58.4 58.5 58.5 58.5Strength (kips/ft) 0.480 0.444 0.413 0.386 0.362 0.341 0.323 0.306 0.291Stiffness, G' (kip/in) 59.7 58.7 57.6 56.4 55.1 53.9 52.6 51.4 50.2Strength (kips/ft) 0.497 0.461 0.430 0.402 0.379 0.358 0.339 0.323 0.308Stiffness, G' (kip/in) 60.9 60.1 59.1 58.0 56.9 55.7 54.6 53.4 52.3Strength (kips/ft) 0.514 0.477 0.446 0.419 0.395 0.375 0.356 0.339 0.325Stiffness, G' (kip/in) 62.1 61.4 60.5 59.6 58.6 57.6 56.5 55.4 54.4Strength (kips/ft) 0.547 0.511 0.480 0.452 0.429 0.408 0.389 0.373 0.358Stiffness, G' (kip/in) 64.3 63.9 63.3 62.6 61.8 61.0 60.1 59.3 58.4Strength (kips/ft) 0.580 0.544 0.513 0.486 0.462 0.441 0.423 0.406 0.391Stiffness, G' (kip/in) 66.4 66.2 65.9 65.4 64.9 64.2 63.6 62.9 62.2Strength (kips/ft) 0.639 0.608 0.580 0.552 0.529 0.508 0.489 0.473 0.458Stiffness, G' (kip/in) 70.2 70.5 70.6 70.6 70.4 70.2 69.8 69.5 69.1Strength (kips/ft) 0.518 0.479 0.445 0.416 0.390 0.368 0.348 2.735 0.314Stiffness, G' (kip/in) 95.3 90.6 86.4 82.5 79.0 75.7 72.8 82.0 67.5Strength (kips/ft) 0.535 0.495 0.462 0.433 0.407 0.385 0.365 2.736 0.330Stiffness, G' (kip/in) 97.5 92.9 88.8 85.0 81.5 78.4 75.5 82.0 70.3Strength (kips/ft) 0.551 0.512 0.478 0.449 0.424 0.401 0.381 2.738 0.347Stiffness, G' (kip/in) 99.6 95.2 91.1 87.4 84.1 81.0 78.1 82.1 73.1Strength (kips/ft) 0.585 0.545 0.512 0.483 0.457 0.435 0.415 2.740 0.380Stiffness, G' (kip/in) 103.8 99.6 95.7 92.2 89.0 86.0 83.3 82.1 78.5Strength (kips/ft) 0.618 0.579 0.545 0.516 0.490 0.468 0.448 2.743 0.414Stiffness, G' (kip/in) 107.9 103.9 100.2 96.8 93.8 90.9 88.3 82.1 83.7Strength (kips/ft) 0.685 0.645 0.612 0.583 0.557 0.535 0.515 2.749 0.480Stiffness, G' (kip/in) 115.6 112.0 108.7 105.6 102.8 100.3 97.9 82.2 93.7Strength (kips/ft) 0.857 0.792 0.736 0.687 0.645 0.607 0.574 0.544 0.517Stiffness, G' (kip/in) 125.4 120.1 115.1 110.5 106.2 102.2 98.5 95.0 91.8Strength (kips/ft) 0.874 0.808 0.752 0.704 0.661 0.624 0.591 0.561 0.534Stiffness, G' (kip/in) 127.1 121.9 117.0 112.5 108.3 104.4 100.8 97.4 94.3Strength (kips/ft) 0.891 0.825 0.769 0.721 0.678 0.641 0.607 0.577 0.551Stiffness, G' (kip/in) 128.8 123.7 119.0 114.5 110.4 106.6 103.1 99.7 96.6Strength (kips/ft) 0.924 0.858 0.802 0.754 0.711 0.674 0.641 0.611 0.584Stiffness, G' (kip/in) 132.1 127.2 122.7 118.5 114.5 110.9 107.5 104.3 101.3Strength (kips/ft) 0.956 0.892 0.836 0.787 0.745 0.707 0.674 0.644 0.617Stiffness, G' (kip/in) 135.3 130.7 126.4 122.3 118.5 115.0 111.8 108.7 105.8Strength (kips/ft) 1.017 0.957 0.902 0.854 0.811 0.774 0.741 0.711 0.684Stiffness, G' (kip/in) 141.5 137.3 133.3 129.6 126.2 123.0 120.0 117.1 114.5

Nominal Shear Strength due to Panel Buckling (kips/ft)

6 6.5 7 7.5 8 8.5 9 9.5 1011.2 9.52 8.21 7.15 6.29 5.57 4.97 4.46 4.02

Span (ft)

6 6.5 7 7.5 8 8.5 9 9.5 10

36/4

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/7

36

24

18

12

9

6

Span (ft)

36/9

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

10

Design Thickness 0.0299 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.338 0.313 0.294 0.278 0.264 0.252 0.241 0.232 0.224Stiffness, G' (kip/in) 9.8 11.1 12.3 13.5 14.6 15.6 16.6 17.5 18.4Strength (kips/ft) 0.386 0.364 0.347 0.333 0.321 0.311 0.303 0.296 0.290Stiffness, G' (kip/in) 9.9 11.3 12.7 13.9 15.1 16.3 17.4 18.4 19.5Strength (kips/ft) 0.429 0.409 0.394 0.381 0.371 0.363 0.355 0.349 0.343Stiffness, G' (kip/in) 10.0 11.5 12.9 14.2 15.5 16.7 17.9 19.1 20.2Strength (kips/ft) 0.499 0.484 0.473 0.463 0.455 0.448 0.443 0.438 0.433Stiffness, G' (kip/in) 10.2 11.7 13.2 14.6 15.9 17.3 18.6 19.8 21.0Strength (kips/ft) 0.553 0.542 0.533 0.525 0.519 0.514 0.510 0.506 0.503Stiffness, G' (kip/in) 10.3 11.8 13.3 14.8 16.2 17.6 19.0 20.3 21.6Strength (kips/ft) 0.624 0.618 0.613 0.608 0.605 0.602 0.599 0.597 0.595Stiffness, G' (kip/in) 10.4 12.0 13.5 15.0 16.5 18.0 19.4 20.8 22.1Strength (kips/ft) 0.441 0.404 0.375 0.351 0.332 0.313 0.297 0.284 0.273Stiffness, G' (kip/in) 13.6 15.3 16.9 18.4 19.7 21.0 22.1 23.2 24.2Strength (kips/ft) 0.491 0.457 0.429 0.408 0.390 0.374 0.362 0.351 0.341Stiffness, G' (kip/in) 13.8 15.6 17.3 19.0 20.5 21.9 23.2 24.5 25.7Strength (kips/ft) 0.537 0.505 0.480 0.460 0.443 0.429 0.418 0.407 0.398Stiffness, G' (kip/in) 13.9 15.8 17.7 19.4 21.0 22.5 24.0 25.4 26.7Strength (kips/ft) 0.616 0.590 0.569 0.552 0.538 0.527 0.517 0.508 0.501Stiffness, G' (kip/in) 14.1 16.2 18.1 19.9 21.7 23.4 25.0 26.5 28.0Strength (kips/ft) 0.681 0.659 0.643 0.629 0.617 0.608 0.599 0.592 0.586Stiffness, G' (kip/in) 14.3 16.3 18.3 20.3 22.1 23.9 25.6 27.3 28.9Strength (kips/ft) 0.78 0.76 0.75 0.74 0.73 0.73 0.72 0.72 0.71Stiffness, G' (kip/in) 14.5 16.6 18.7 20.7 22.6 24.5 26.3 28.1 29.8Strength (kips/ft) 0.498 0.451 0.413 0.381 0.355 0.334 0.316 0.301 0.289Stiffness, G' (kip/in) 53.8 55.9 57.2 58.1 58.6 58.8 59.0 59.0 58.9Strength (kips/ft) 0.557 0.512 0.477 0.449 0.426 0.405 0.387 0.372 0.360Stiffness, G' (kip/in) 56.2 59.0 61.1 62.6 63.8 64.7 65.4 66.0 66.4Strength (kips/ft) 0.613 0.570 0.536 0.510 0.488 0.470 0.455 0.442 0.431Stiffness, G' (kip/in) 58.1 61.5 64.2 66.3 68.1 69.5 70.6 71.6 72.4Strength (kips/ft) 0.716 0.678 0.647 0.623 0.604 0.587 0.573 0.561 0.551Stiffness, G' (kip/in) 61.1 65.4 69.0 71.9 74.4 76.6 78.5 80.1 81.5Strength (kips/ft) 0.809 0.774 0.747 0.726 0.708 0.693 0.681 0.670 0.661Stiffness, G' (kip/in) 63.3 68.2 72.4 75.9 79.0 81.7 84.1 86.2 88.1Strength (kips/ft) 0.961 0.935 0.914 0.897 0.883 0.872 0.862 0.854 0.846Stiffness, G' (kip/in) 66.3 72.0 77.0 81.3 85.2 88.6 91.6 94.4 96.8Strength (kips/ft) 0.797 0.714 0.650 0.597 0.555 0.519 0.486 0.458 0.434Stiffness, G' (kip/in) 59.9 62.9 65.1 66.5 67.5 68.0 68.4 68.5 68.4Strength (kips/ft) 0.851 0.772 0.709 0.659 0.617 0.583 0.554 0.529 0.505Stiffness, G' (kip/in) 61.2 64.8 67.5 69.5 71.0 72.2 73.0 73.6 74.1Strength (kips/ft) 0.904 0.827 0.766 0.718 0.678 0.644 0.616 0.592 0.571Stiffness, G' (kip/in) 62.4 66.4 69.5 72.0 74.0 75.6 76.9 77.9 78.8Strength (kips/ft) 1.001 0.931 0.875 0.830 0.793 0.761 0.735 0.712 0.692Stiffness, G' (kip/in) 64.2 69.0 72.8 76.0 78.7 81.0 82.9 84.6 86.0Strength (kips/ft) 1.091 1.026 0.975 0.934 0.899 0.870 0.846 0.825 0.806Stiffness, G' (kip/in) 65.7 70.9 75.3 79.0 82.2 85.0 87.4 89.6 91.4Strength (kips/ft) 1.246 1.193 1.151 1.116 1.087 1.063 1.043 1.025 1.009Stiffness, G' (kip/in) 67.8 73.7 78.8 83.3 87.2 90.6 93.7 96.5 98.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

3 3.5 4 4.5 5 5.5 6 6.5 715.0 11.04 8.45 6.68 5.41 4.47 3.76 3.20 2.76

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

3 3.5 4 4.5 5 5.5 6 6.5 7

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

11

Design Thickness 0.0359 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.356 0.338 0.324 0.311 0.299 0.289 0.280 0.273 0.266Stiffness, G' (kip/in) 18.2 19.8 21.2 22.5 23.7 24.9 25.9 26.9 27.8Strength (kips/ft) 0.425 0.409 0.396 0.386 0.376 0.369 0.362 0.356 0.351Stiffness, G' (kip/in) 18.9 20.6 22.3 23.8 25.3 26.6 27.9 29.1 30.3Strength (kips/ft) 0.486 0.472 0.461 0.451 0.443 0.436 0.430 0.425 0.420Stiffness, G' (kip/in) 19.4 21.2 23.0 24.7 26.3 27.8 29.3 30.7 32.0Strength (kips/ft) 0.585 0.574 0.566 0.559 0.553 0.548 0.543 0.539 0.535Stiffness, G' (kip/in) 19.9 22.0 23.9 25.8 27.6 29.3 31.0 32.6 34.1Strength (kips/ft) 0.658 0.651 0.644 0.639 0.635 0.631 0.627 0.624 0.622Stiffness, G' (kip/in) 20.3 22.4 24.5 26.4 28.4 30.2 32.0 33.7 35.4Strength (kips/ft) 0.753 0.748 0.745 0.742 0.740 0.737 0.736 0.734 0.733Stiffness, G' (kip/in) 20.7 22.9 25.1 27.2 29.2 31.2 33.2 35.0 36.9Strength (kips/ft) 0.453 0.426 0.404 0.385 0.367 0.352 0.339 0.327 0.317Stiffness, G' (kip/in) 24.7 26.6 28.3 29.8 31.1 32.4 33.5 34.5 35.4Strength (kips/ft) 0.525 0.500 0.479 0.462 0.447 0.435 0.424 0.415 0.406Stiffness, G' (kip/in) 25.6 27.7 29.7 31.5 33.2 34.7 36.1 37.5 38.7Strength (kips/ft) 0.590 0.568 0.549 0.533 0.520 0.508 0.498 0.489 0.482Stiffness, G' (kip/in) 26.2 28.5 30.7 32.7 34.6 36.4 38.0 39.6 41.0Strength (kips/ft) 0.704 0.685 0.670 0.657 0.646 0.636 0.628 0.621 0.614Stiffness, G' (kip/in) 27.0 29.6 32.0 34.3 36.5 38.5 40.5 42.4 44.1Strength (kips/ft) 0.795 0.780 0.768 0.758 0.749 0.741 0.734 0.729 0.723Stiffness, G' (kip/in) 27.6 30.3 32.9 35.3 37.7 39.9 42.1 44.1 46.1Strength (kips/ft) 0.926 0.917 0.909 0.903 0.897 0.892 0.888 0.884 0.881Stiffness, G' (kip/in) 28.3 31.1 33.9 36.6 39.1 41.6 44.0 46.2 48.4Strength (kips/ft) 0.502 0.464 0.435 0.410 0.390 0.373 0.358 0.345 0.334Stiffness, G' (kip/in) 72.7 72.8 72.7 72.3 71.9 71.4 70.9 70.3 69.8Strength (kips/ft) 0.583 0.551 0.525 0.504 0.483 0.466 0.451 0.439 0.427Stiffness, G' (kip/in) 78.5 79.5 80.2 80.6 80.8 80.9 80.9 80.9 80.8Strength (kips/ft) 0.661 0.630 0.605 0.585 0.567 0.553 0.540 0.529 0.519Stiffness, G' (kip/in) 83.2 85.0 86.3 87.3 88.1 88.7 89.2 89.6 89.9Strength (kips/ft) 0.804 0.777 0.755 0.736 0.720 0.707 0.695 0.685 0.676Stiffness, G' (kip/in) 90.6 93.5 95.8 97.7 99.4 100.8 102.0 103.0 103.9Strength (kips/ft) 0.932 0.908 0.888 0.871 0.858 0.846 0.835 0.826 0.818Stiffness, G' (kip/in) 96.0 99.7 102.8 105.4 107.7 109.7 111.4 113.0 114.4Strength (kips/ft) 1.140 1.122 1.107 1.094 1.084 1.075 1.067 1.060 1.054Stiffness, G' (kip/in) 103.5 108.3 112.4 116.0 119.2 122.0 124.5 126.7 128.8Strength (kips/ft) 0.783 0.722 0.672 0.630 0.593 0.561 0.532 0.508 0.487Stiffness, G' (kip/in) 84.5 85.2 85.4 85.3 84.9 84.3 83.7 83.0 82.3Strength (kips/ft) 0.861 0.802 0.754 0.713 0.679 0.650 0.625 0.601 0.580Stiffness, G' (kip/in) 88.3 89.8 90.7 91.2 91.5 91.6 91.5 91.4 91.1Strength (kips/ft) 0.936 0.879 0.833 0.794 0.761 0.732 0.708 0.686 0.667Stiffness, G' (kip/in) 91.5 93.6 95.2 96.3 97.1 97.7 98.1 98.4 98.5Strength (kips/ft) 1.077 1.025 0.982 0.946 0.915 0.889 0.866 0.846 0.828Stiffness, G' (kip/in) 96.8 99.8 102.3 104.3 106.0 107.4 108.5 109.5 110.3Strength (kips/ft) 1.206 1.159 1.119 1.086 1.058 1.034 1.013 0.994 0.978Stiffness, G' (kip/in) 100.8 104.6 107.8 110.5 112.8 114.7 116.4 117.9 119.2Strength (kips/ft) 1.428 1.390 1.358 1.330 1.307 1.287 1.270 1.255 1.241Stiffness, G' (kip/in) 106.6 111.5 115.6 119.3 122.4 125.2 127.7 129.9 131.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

4 4.5 5 5.5 6 6.5 7 7.5 811.47 9.060 7.339 6.065 5.096 4.343 3.744 3.262 2.867

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

4 4.5 5 5.5 6 6.5 7 7.5 8

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

12

Design Thickness 0.0478 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.444 0.430 0.418 0.408 0.399 0.390 0.382 0.375 0.369Stiffness, G' (kip/in) 36.2 37.9 39.4 40.7 41.9 43.0 43.9 44.8 45.6Strength (kips/ft) 0.552 0.540 0.530 0.521 0.513 0.506 0.500 0.495 0.490Stiffness, G' (kip/in) 39.0 41.2 43.2 45.0 46.6 48.2 49.6 50.9 52.2Strength (kips/ft) 0.647 0.636 0.627 0.620 0.613 0.607 0.602 0.597 0.593Stiffness, G' (kip/in) 41.0 43.5 45.8 48.0 50.0 51.9 53.6 55.3 56.8Strength (kips/ft) 0.796 0.788 0.782 0.776 0.771 0.767 0.764 0.760 0.757Stiffness, G' (kip/in) 43.6 46.5 49.3 51.9 54.4 56.8 59.0 61.1 63.1Strength (kips/ft) 0.901 0.896 0.891 0.887 0.884 0.881 0.878 0.876 0.874Stiffness, G' (kip/in) 45.2 48.4 51.5 54.4 57.2 59.8 62.4 64.8 67.1Strength (kips/ft) 1.028 1.025 1.023 1.021 1.019 1.018 1.017 1.015 1.014Stiffness, G' (kip/in) 47.1 50.6 54.1 57.3 60.5 63.5 66.4 69.2 71.9Strength (kips/ft) 0.550 0.527 0.508 0.492 0.476 0.462 0.450 0.439 0.429Stiffness, G' (kip/in) 47.1 48.8 50.2 51.4 52.5 53.4 54.3 55.0 55.6Strength (kips/ft) 0.665 0.644 0.626 0.611 0.598 0.587 0.576 0.567 0.559Stiffness, G' (kip/in) 50.5 52.8 54.9 56.7 58.3 59.8 61.1 62.3 63.5Strength (kips/ft) 0.768 0.749 0.734 0.720 0.708 0.698 0.688 0.680 0.673Stiffness, G' (kip/in) 53.1 55.8 58.3 60.6 62.6 64.5 66.3 67.9 69.4Strength (kips/ft) 0.944 0.929 0.916 0.905 0.896 0.888 0.880 0.874 0.868Stiffness, G' (kip/in) 56.7 60.0 63.1 66.0 68.7 71.2 73.5 75.7 77.7Strength (kips/ft) 1.080 1.069 1.059 1.051 1.043 1.037 1.031 1.026 1.022Stiffness, G' (kip/in) 59.0 62.8 66.3 69.6 72.7 75.6 78.3 80.9 83.3Strength (kips/ft) 1.267 1.260 1.254 1.249 1.245 1.241 1.238 1.235 1.232Stiffness, G' (kip/in) 61.9 66.2 70.2 74.0 77.6 81.0 84.3 87.4 90.3Strength (kips/ft) 0.597 0.567 0.542 0.520 0.502 0.486 0.472 2.024 0.449Stiffness, G' (kip/in) 97.5 95.9 94.4 92.9 91.5 90.2 89.0 49.6 86.9Strength (kips/ft) 0.729 0.703 0.680 0.661 0.645 0.630 0.616 2.048 0.593Stiffness, G' (kip/in) 109.4 108.6 107.8 107.1 106.3 105.5 104.8 49.7 103.5Strength (kips/ft) 0.851 0.826 0.804 0.786 0.771 0.757 0.745 2.070 0.725Stiffness, G' (kip/in) 119.5 119.4 119.3 119.1 118.8 118.5 118.2 49.7 117.6Strength (kips/ft) 1.073 1.051 1.032 1.016 1.002 0.990 0.980 2.109 0.962Stiffness, G' (kip/in) 135.6 136.7 137.7 138.4 139.0 139.5 139.9 49.9 140.5Strength (kips/ft) 1.266 1.247 1.231 1.217 1.205 1.195 1.186 2.143 1.170Stiffness, G' (kip/in) 147.9 150.0 151.7 153.2 154.5 155.5 156.5 50.0 158.0Strength (kips/ft) 1.572 1.558 1.547 1.537 1.528 1.520 1.514 2.197 1.503Stiffness, G' (kip/in) 165.6 169.0 171.9 174.5 176.7 178.7 180.4 50.3 183.4Strength (kips/ft) 0.908 0.855 0.810 0.771 0.734 0.703 0.676 0.651 0.630Stiffness, G' (kip/in) 118.0 116.1 114.2 112.3 110.5 108.7 107.0 105.4 103.9Strength (kips/ft) 1.033 0.982 0.938 0.901 0.868 0.840 0.815 0.793 0.773Stiffness, G' (kip/in) 126.8 125.9 124.8 123.6 122.4 121.3 120.1 119.0 118.0Strength (kips/ft) 1.153 1.103 1.062 1.026 0.995 0.967 0.943 0.922 0.903Stiffness, G' (kip/in) 134.5 134.3 133.9 133.3 132.7 132.1 131.4 130.8 130.1Strength (kips/ft) 1.377 1.332 1.294 1.261 1.232 1.207 1.185 1.166 1.148Stiffness, G' (kip/in) 147.1 148.1 148.8 149.3 149.6 149.8 149.9 150.0 150.0Strength (kips/ft) 1.579 1.539 1.505 1.475 1.449 1.426 1.406 1.389 1.373Stiffness, G' (kip/in) 157.0 159.0 160.5 161.8 162.8 163.7 164.4 165.1 165.6Strength (kips/ft) 1.921 1.889 1.862 1.839 1.818 1.800 1.784 1.770 1.757Stiffness, G' (kip/in) 171.7 175.0 177.8 180.2 182.3 184.1 185.7 187.1 188.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

5 5.5 6 6.5 7 7.5 8 8.5 911.5 9.53 8.01 6.83 5.89 5.13 4.51 3.99 3.56

Span (ft)

36/9

36

24

12

9

6

18

36/7

36

24

12

9

6

18

36/5

36

24

12

9

6

18

Span (ft)

5 5.5 6 6.5 7 7.5 8 8.5 9

36/4

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

13

Design Thickness 0.0598 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.540 0.529 0.519 0.511 0.504 0.497 0.491 0.486 0.481Stiffness, G' (kip/in) 55.6 56.9 58.0 58.9 59.7 60.5 61.1 61.7 62.2Strength (kips/ft) 0.693 0.684 0.675 0.668 0.662 0.656 0.651 0.646 0.642Stiffness, G' (kip/in) 62.6 64.5 66.3 67.9 69.4 70.7 71.9 73.0 74.0Strength (kips/ft) 0.824 0.816 0.809 0.803 0.797 0.792 0.788 0.784 0.781Stiffness, G' (kip/in) 67.6 70.2 72.5 74.6 76.5 78.3 80.0 81.6 83.0Strength (kips/ft) 1.024 1.018 1.013 1.009 1.005 1.002 0.999 0.996 0.994Stiffness, G' (kip/in) 74.6 77.9 81.0 83.9 86.5 89.0 91.4 93.6 95.7Strength (kips/ft) 1.159 1.155 1.152 1.149 1.147 1.144 1.142 1.141 1.139Stiffness, G' (kip/in) 79.1 83.0 86.6 90.0 93.2 96.2 99.0 101.7 104.3Strength (kips/ft) 1.314 1.312 1.311 1.309 1.308 1.307 1.306 1.305 1.305Stiffness, G' (kip/in) 84.7 89.2 93.5 97.6 101.4 105.1 108.6 111.9 115.0Strength (kips/ft) 0.654 0.635 0.619 0.604 0.592 0.580 0.568 0.558 0.549Stiffness, G' (kip/in) 69.3 70.2 71.0 71.5 72.0 72.4 72.7 73.0 73.2Strength (kips/ft) 0.816 0.799 0.784 0.771 0.760 0.750 0.740 0.732 0.725Stiffness, G' (kip/in) 77.4 79.1 80.6 82.0 83.1 84.1 85.0 85.9 86.6Strength (kips/ft) 0.962 0.947 0.934 0.922 0.912 0.903 0.894 0.887 0.880Stiffness, G' (kip/in) 83.7 86.0 88.2 90.1 91.8 93.3 94.7 96.0 97.2Strength (kips/ft) 1.204 1.192 1.182 1.173 1.165 1.158 1.152 1.146 1.141Stiffness, G' (kip/in) 92.7 96.0 99.1 101.9 104.5 106.8 109.0 111.0 112.9Strength (kips/ft) 1.387 1.378 1.370 1.364 1.358 1.352 1.348 1.343 1.339Stiffness, G' (kip/in) 98.9 102.9 106.7 110.1 113.3 116.2 119.0 121.6 124.0Strength (kips/ft) 1.624 1.620 1.615 1.612 1.608 1.605 1.603 1.600 1.598Stiffness, G' (kip/in) 106.9 111.8 116.4 120.7 124.8 128.5 132.1 135.4 138.6Strength (kips/ft) 0.702 0.677 0.656 0.637 0.621 0.606 0.593 0.582 0.572Stiffness, G' (kip/in) 113.7 111.4 109.3 107.3 105.6 104.0 102.5 101.1 99.9Strength (kips/ft) 0.889 0.867 0.848 0.831 0.816 0.804 0.792 0.782 0.772Stiffness, G' (kip/in) 131.5 129.8 128.3 126.9 125.6 124.5 123.4 122.4 121.4Strength (kips/ft) 1.060 1.039 1.021 1.005 0.991 0.979 0.968 0.958 0.950Stiffness, G' (kip/in) 146.8 145.8 144.8 143.9 143.1 142.3 141.5 140.8 140.2Strength (kips/ft) 1.369 1.351 1.335 1.321 1.309 1.299 1.289 1.281 1.273Stiffness, G' (kip/in) 172.1 172.1 172.0 171.9 171.8 171.6 171.5 171.3 171.2Strength (kips/ft) 1.633 1.618 1.605 1.593 1.583 1.574 1.566 1.558 1.552Stiffness, G' (kip/in) 192.0 192.8 193.5 194.0 194.5 194.8 195.2 195.5 195.7Strength (kips/ft) 2.037 2.027 2.018 2.010 2.003 1.997 1.991 1.986 1.981Stiffness, G' (kip/in) 221.4 223.4 225.2 226.7 228.0 229.2 230.3 231.2 232.1Strength (kips/ft) 1.032 0.986 0.946 0.908 0.875 0.845 0.819 0.796 0.775Stiffness, G' (kip/in) 140.0 136.8 133.8 131.1 128.5 126.1 123.9 121.8 119.9Strength (kips/ft) 1.211 1.166 1.127 1.093 1.063 1.037 1.013 0.992 0.973Stiffness, G' (kip/in) 154.3 151.9 149.6 147.5 145.5 143.7 142.0 140.3 138.8Strength (kips/ft) 1.382 1.339 1.302 1.269 1.240 1.215 1.192 1.172 1.153Stiffness, G' (kip/in) 166.8 165.1 163.5 161.9 160.5 159.1 157.8 156.6 155.4Strength (kips/ft) 1.699 1.661 1.627 1.598 1.572 1.549 1.528 1.509 1.492Stiffness, G' (kip/in) 187.8 187.3 186.7 186.1 185.5 184.9 184.3 183.7 183.2Strength (kips/ft) 1.984 1.949 1.919 1.893 1.870 1.849 1.831 1.814 1.799Stiffness, G' (kip/in) 204.7 205.0 205.3 205.4 205.5 205.5 205.5 205.5 205.4Strength (kips/ft) 2.453 2.427 2.404 2.384 2.366 2.350 2.336 2.323 2.312Stiffness, G' (kip/in) 230.1 231.9 233.4 234.6 235.7 236.6 237.4 238.1 238.8

Nominal Shear Strength due to Panel Buckling (kips/ft)

6 6.5 7 7.5 8 8.5 9 9.5 1011.2 9.52 8.21 7.15 6.29 5.57 4.97 4.46 4.02

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

6 6.5 7 7.5 8 8.5 9 9.5 10

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

14

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" arc seam weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.834 0.813 0.797 0.784 0.774 0.766 0.758 0.752 0.747Stiffness, G' (kip/in) 9.9 11.3 12.7 14.1 15.4 16.7 17.9 19.1 20.3Strength (kips/ft) 1.066 1.050 1.037 1.028 1.020 1.013 1.007 1.003 0.999Stiffness, G' (kip/in) 10.1 11.7 13.2 14.6 16.0 17.4 18.7 20.0 21.3Strength (kips/ft) 1.244 1.232 1.222 1.215 1.209 1.204 1.199 1.196 1.193Stiffness, G' (kip/in) 10.3 11.8 13.4 14.9 16.3 17.7 19.1 20.5 21.8Strength (kips/ft) 1.478 1.471 1.466 1.461 1.458 1.455 1.453 1.451 1.449Stiffness, G' (kip/in) 10.4 12.0 13.6 15.1 16.6 18.1 19.6 21.0 22.4Strength (kips/ft) 1.611 1.607 1.604 1.602 1.600 1.598 1.597 1.596 1.595Stiffness, G' (kip/in) 10.5 12.1 13.7 15.3 16.8 18.3 19.8 21.2 22.7Strength (kips/ft) 1.741 1.740 1.738 1.737 1.737 1.736 1.735 1.735 1.735Stiffness, G' (kip/in) 10.5 12.2 13.8 15.4 16.9 18.5 20.0 21.5 22.9Strength (kips/ft) 1.089 1.038 0.999 0.968 0.942 0.921 0.903 0.888 0.875Stiffness, G' (kip/in) 13.7 15.6 17.5 19.2 20.9 22.5 24.0 25.5 26.9Strength (kips/ft) 1.333 1.290 1.257 1.231 1.209 1.192 1.177 1.164 1.153Stiffness, G' (kip/in) 14.1 16.1 18.1 20.0 21.8 23.5 25.2 26.9 28.4Strength (kips/ft) 1.533 1.499 1.471 1.450 1.432 1.418 1.405 1.394 1.385Stiffness, G' (kip/in) 14.3 16.4 18.4 20.4 22.3 24.1 25.9 27.6 29.3Strength (kips/ft) 1.827 1.805 1.787 1.773 1.761 1.752 1.744 1.737 1.731Stiffness, G' (kip/in) 14.5 16.7 18.8 20.8 22.8 24.7 26.6 28.5 30.2Strength (kips/ft) 2.018 2.003 1.992 1.983 1.975 1.969 1.964 1.959 1.955Stiffness, G' (kip/in) 14.6 16.8 19.0 21.0 23.1 25.1 27.0 28.9 30.7Strength (kips/ft) 2.23 2.22 2.22 2.21 2.21 2.21 2.20 2.20 2.20Stiffness, G' (kip/in) 14.7 17.0 19.1 21.3 23.4 25.4 27.4 29.3 31.2Strength (kips/ft) 1.231 1.161 1.107 1.065 1.027 0.995 0.969 0.947 0.928Stiffness, G' (kip/in) 55.8 59.5 62.5 65.1 67.4 69.3 71.0 72.5 73.8Strength (kips/ft) 1.523 1.460 1.411 1.373 1.342 1.316 1.294 1.276 1.260Stiffness, G' (kip/in) 60.4 65.2 69.2 72.7 75.7 78.4 80.8 82.9 84.8Strength (kips/ft) 1.787 1.730 1.686 1.652 1.624 1.600 1.581 1.564 1.550Stiffness, G' (kip/in) 63.5 68.8 73.5 77.6 81.2 84.4 87.2 89.8 92.1Strength (kips/ft) 2.225 2.181 2.147 2.120 2.098 2.080 2.065 2.052 2.041Stiffness, G' (kip/in) 67.1 73.3 78.7 83.5 87.8 91.7 95.2 98.3 101.2Strength (kips/ft) 2.558 2.525 2.499 2.479 2.462 2.449 2.437 2.427 2.419Stiffness, G' (kip/in) 69.2 75.9 81.8 87.0 91.8 96.0 99.9 103.4 106.6Strength (kips/ft) 2.995 2.976 2.962 2.951 2.941 2.934 2.927 2.922 2.917Stiffness, G' (kip/in) 71.6 78.8 85.2 91.0 96.2 100.9 105.2 109.2 112.8Strength (kips/ft) 1.968 1.808 1.683 1.583 1.502 1.435 1.378 1.330 1.287Stiffness, G' (kip/in) 61.5 65.7 69.1 71.9 74.2 76.2 77.9 79.3 80.5Strength (kips/ft) 2.240 2.092 1.976 1.884 1.808 1.745 1.692 1.646 1.607Stiffness, G' (kip/in) 64.2 69.2 73.4 77.0 80.1 82.8 85.2 87.3 89.2Strength (kips/ft) 2.490 2.354 2.248 2.162 2.092 2.034 1.985 1.942 1.906Stiffness, G' (kip/in) 66.1 71.6 76.4 80.6 84.2 87.5 90.3 92.9 95.2Strength (kips/ft) 2.923 2.811 2.723 2.652 2.594 2.545 2.503 2.468 2.437Stiffness, G' (kip/in) 68.6 74.9 80.4 85.2 89.6 93.5 96.9 100.1 103.0Strength (kips/ft) 3.276 3.185 3.113 3.056 3.008 2.968 2.934 2.905 2.879Stiffness, G' (kip/in) 70.2 76.9 82.8 88.1 92.9 97.2 101.0 104.5 107.8Strength (kips/ft) 3.790 3.731 3.685 3.647 3.616 3.590 3.568 3.549 3.532Stiffness, G' (kip/in) 72.1 79.3 85.8 91.5 96.8 101.5 105.8 109.8 113.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

3 3.5 4 4.5 5 5.5 6 6.5 715.0 11.0 8.45 6.68 5.41 4.47 3.76 3.20 2.76

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

3 3.5 4 4.5 5 5.5 6 6.5 7

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

15

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" arc seam weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.064 1.043 1.027 1.013 1.002 0.992 0.984 0.976 0.970Stiffness, G' (kip/in) 19.0 20.9 22.8 24.6 26.2 27.9 29.4 30.9 32.4Strength (kips/ft) 1.375 1.359 1.345 1.334 1.325 1.318 1.311 1.305 1.300Stiffness, G' (kip/in) 19.9 22.0 24.0 26.0 27.9 29.7 31.5 33.2 34.8Strength (kips/ft) 1.618 1.605 1.595 1.586 1.579 1.573 1.568 1.564 1.560Stiffness, G' (kip/in) 20.4 22.5 24.7 26.7 28.7 30.7 32.5 34.4 36.1Strength (kips/ft) 1.945 1.937 1.932 1.927 1.923 1.919 1.916 1.913 1.911Stiffness, G' (kip/in) 20.8 23.1 25.3 27.5 29.6 31.7 33.7 35.6 37.5Strength (kips/ft) 2.136 2.132 2.128 2.125 2.123 2.121 2.119 2.117 2.116Stiffness, G' (kip/in) 21.0 23.4 25.7 27.9 30.1 32.2 34.2 36.3 38.2Strength (kips/ft) 2.326 2.324 2.322 2.321 2.320 2.320 2.319 2.318 2.318Stiffness, G' (kip/in) 21.3 23.7 26.0 28.3 30.5 32.7 34.9 36.9 39.0Strength (kips/ft) 1.336 1.290 1.253 1.222 1.196 1.174 1.155 1.138 1.123Stiffness, G' (kip/in) 25.8 28.2 30.4 32.6 34.6 36.5 38.3 40.1 41.7Strength (kips/ft) 1.668 1.629 1.598 1.571 1.549 1.530 1.513 1.499 1.486Stiffness, G' (kip/in) 27.0 29.7 32.2 34.6 37.0 39.2 41.3 43.3 45.2Strength (kips/ft) 1.947 1.915 1.889 1.866 1.848 1.832 1.818 1.806 1.795Stiffness, G' (kip/in) 27.7 30.5 33.2 35.8 38.3 40.7 43.0 45.2 47.3Strength (kips/ft) 2.366 2.344 2.326 2.312 2.299 2.288 2.279 2.271 2.264Stiffness, G' (kip/in) 28.5 31.4 34.3 37.1 39.7 42.3 44.8 47.2 49.5Strength (kips/ft) 2.644 2.629 2.618 2.608 2.600 2.592 2.586 2.581 2.576Stiffness, G' (kip/in) 28.9 31.9 34.9 37.7 40.5 43.2 45.8 48.3 50.7Strength (kips/ft) 2.958 2.951 2.946 2.941 2.937 2.934 2.931 2.929 2.926Stiffness, G' (kip/in) 29.3 32.4 35.5 38.4 41.3 44.1 46.8 49.5 52.0Strength (kips/ft) 1.481 1.420 1.368 1.323 1.285 1.253 1.226 1.202 1.182Stiffness, G' (kip/in) 80.7 83.2 85.3 87.1 88.6 89.9 91.1 92.1 93.1Strength (kips/ft) 1.870 1.814 1.769 1.732 1.700 1.674 1.651 1.631 1.613Stiffness, G' (kip/in) 91.0 94.6 97.8 100.5 102.8 104.9 106.8 108.4 109.9Strength (kips/ft) 2.225 2.174 2.133 2.099 2.071 2.047 2.026 2.007 1.991Stiffness, G' (kip/in) 97.8 102.3 106.1 109.5 112.5 115.1 117.5 119.6 121.5Strength (kips/ft) 2.826 2.786 2.754 2.727 2.704 2.685 2.668 2.654 2.641Stiffness, G' (kip/in) 106.4 111.9 116.7 120.9 124.7 128.1 131.2 133.9 136.4Strength (kips/ft) 3.294 3.264 3.239 3.218 3.200 3.185 3.172 3.161 3.151Stiffness, G' (kip/in) 111.6 117.7 123.1 127.9 132.2 136.0 139.5 142.7 145.6Strength (kips/ft) 3.924 3.906 3.891 3.879 3.869 3.861 3.853 3.847 3.841Stiffness, G' (kip/in) 117.5 124.3 130.4 135.9 140.8 145.2 149.3 152.9 156.3Strength (kips/ft) 2.257 2.119 2.006 1.913 1.834 1.766 1.708 1.654 1.605Stiffness, G' (kip/in) 90.8 93.4 95.4 97.1 98.5 99.7 100.6 101.4 102.1Strength (kips/ft) 2.632 2.503 2.398 2.310 2.236 2.172 2.117 2.069 2.027Stiffness, G' (kip/in) 97.7 101.4 104.5 107.2 109.5 111.4 113.2 114.7 116.1Strength (kips/ft) 2.982 2.862 2.764 2.682 2.613 2.553 2.502 2.457 2.417Stiffness, G' (kip/in) 102.6 107.1 111.0 114.3 117.2 119.8 122.1 124.1 125.9Strength (kips/ft) 3.598 3.498 3.415 3.345 3.287 3.236 3.192 3.154 3.120Stiffness, G' (kip/in) 109.2 114.7 119.5 123.8 127.5 130.9 133.9 136.6 139.0Strength (kips/ft) 4.111 4.028 3.960 3.902 3.853 3.811 3.775 3.742 3.714Stiffness, G' (kip/in) 113.4 119.5 124.9 129.7 134.0 137.8 141.3 144.5 147.3Strength (kips/ft) 4.876 4.821 4.775 4.736 4.704 4.675 4.651 4.629 4.610Stiffness, G' (kip/in) 118.4 125.3 131.4 136.9 141.8 146.2 150.2 153.9 157.2

Nominal Shear Strength due to Panel Buckling (kips/ft)

4 4.5 5 5.5 6 6.5 7 7.5 811.47 9.060 7.339 6.065 5.096 4.343 3.744 3.262 2.867

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

4 4.5 5 5.5 6 6.5 7 7.5 8

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

16

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" arc seam weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.388 1.376 1.366 1.358 1.351 1.345 1.339 1.335 1.330Stiffness, G' (kip/in) 40.4 43.1 45.7 48.1 50.4 52.6 54.6 56.6 58.4Strength (kips/ft) 1.838 1.829 1.821 1.815 1.809 1.805 1.800 1.797 1.793Stiffness, G' (kip/in) 43.9 47.1 50.1 53.0 55.7 58.3 60.8 63.2 65.5Strength (kips/ft) 2.178 2.172 2.166 2.161 2.157 2.154 2.150 2.148 2.145Stiffness, G' (kip/in) 45.8 49.2 52.5 55.7 58.7 61.6 64.3 67.0 69.6Strength (kips/ft) 2.616 2.612 2.609 2.607 2.604 2.602 2.601 2.599 2.598Stiffness, G' (kip/in) 47.8 51.5 55.1 58.6 61.9 65.2 68.3 71.3 74.1Strength (kips/ft) 2.858 2.855 2.854 2.852 2.851 2.850 2.849 2.848 2.847Stiffness, G' (kip/in) 48.8 52.7 56.5 60.2 63.7 67.1 70.4 73.6 76.6Strength (kips/ft) 3.086 3.085 3.084 3.084 3.083 3.083 3.082 3.082 3.082Stiffness, G' (kip/in) 49.9 54.0 58.0 61.8 65.5 69.1 72.6 76.0 79.3Strength (kips/ft) 1.686 1.652 1.624 1.600 1.579 1.561 1.545 1.531 1.518Stiffness, G' (kip/in) 52.5 55.5 58.3 61.0 63.4 65.7 67.8 69.8 71.6Strength (kips/ft) 2.178 2.150 2.126 2.106 2.089 2.073 2.060 2.048 2.037Stiffness, G' (kip/in) 57.2 60.9 64.3 67.6 70.6 73.5 76.2 78.7 81.1Strength (kips/ft) 2.583 2.561 2.541 2.525 2.510 2.498 2.487 2.477 2.469Stiffness, G' (kip/in) 60.0 64.1 67.9 71.5 74.9 78.2 81.3 84.2 87.0Strength (kips/ft) 3.170 3.155 3.143 3.133 3.123 3.115 3.108 3.102 3.097Stiffness, G' (kip/in) 63.1 67.6 71.9 76.0 79.9 83.6 87.2 90.5 93.8Strength (kips/ft) 3.542 3.532 3.525 3.518 3.512 3.507 3.503 3.499 3.495Stiffness, G' (kip/in) 64.8 69.6 74.2 78.5 82.7 86.7 90.5 94.1 97.6Strength (kips/ft) 3.939 3.935 3.932 3.929 3.926 3.924 3.922 3.921 3.919Stiffness, G' (kip/in) 66.6 71.7 76.5 81.2 85.7 89.9 94.1 98.0 101.8Strength (kips/ft) 1.846 1.800 1.762 1.728 1.697 1.670 1.646 1.626 1.607Stiffness, G' (kip/in) 117.8 119.1 120.1 121.0 121.8 122.5 123.1 123.6 124.0Strength (kips/ft) 2.421 2.380 2.345 2.315 2.289 2.267 2.248 2.230 2.215Stiffness, G' (kip/in) 139.0 141.4 143.4 145.2 146.7 148.1 149.3 150.4 151.4Strength (kips/ft) 2.940 2.903 2.872 2.845 2.822 2.802 2.785 2.769 2.755Stiffness, G' (kip/in) 154.0 157.2 160.0 162.4 164.6 166.5 168.2 169.7 171.1Strength (kips/ft) 3.802 3.774 3.750 3.729 3.711 3.696 3.683 3.671 3.660Stiffness, G' (kip/in) 173.7 178.2 182.0 185.4 188.5 191.2 193.6 195.8 197.8Strength (kips/ft) 4.450 4.429 4.412 4.396 4.383 4.372 4.362 4.353 4.345Stiffness, G' (kip/in) 186.2 191.4 196.0 200.1 203.7 206.9 209.9 212.5 214.9Strength (kips/ft) 5.283 5.271 5.262 5.253 5.246 5.240 5.234 5.230 5.225Stiffness, G' (kip/in) 201.1 207.3 212.8 217.7 222.0 225.9 229.5 232.7 235.7Strength (kips/ft) 2.676 2.561 2.464 2.382 2.310 2.248 2.193 2.144 2.099Stiffness, G' (kip/in) 134.9 135.7 136.2 136.5 136.8 136.9 137.0 137.1 137.1Strength (kips/ft) 3.244 3.137 3.046 2.969 2.902 2.844 2.792 2.746 2.706Stiffness, G' (kip/in) 151.0 153.1 154.8 156.2 157.3 158.4 159.2 160.0 160.7Strength (kips/ft) 3.769 3.670 3.587 3.515 3.454 3.399 3.352 3.309 3.271Stiffness, G' (kip/in) 162.9 165.9 168.4 170.6 172.5 174.2 175.6 176.9 178.1Strength (kips/ft) 4.686 4.605 4.536 4.476 4.425 4.380 4.340 4.304 4.273Stiffness, G' (kip/in) 179.2 183.5 187.2 190.5 193.3 195.9 198.2 200.2 202.1Strength (kips/ft) 5.434 5.368 5.312 5.264 5.222 5.186 5.153 5.125 5.099Stiffness, G' (kip/in) 189.9 195.0 199.5 203.5 207.0 210.1 213.0 215.5 217.8Strength (kips/ft) 6.509 6.467 6.432 6.402 6.375 6.352 6.331 6.313 6.296Stiffness, G' (kip/in) 203.1 209.2 214.7 219.5 223.8 227.7 231.2 234.4 237.3

Nominal Shear Strength due to Panel Buckling (kips/ft)

5 5.5 6 6.5 7 7.5 8 8.5 911.5 9.53 8.01 6.83 5.89 5.13 4.51 3.99 3.56

Span (ft)

36/9

36

24

12

9

6

18

36/7

36

24

12

9

6

18

36/5

36

24

12

9

6

18

Span (ft)

5 5.5 6 6.5 7 7.5 8 8.5 9

36/4

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

17

Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" arc seam weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.740 1.734 1.730 1.726 1.722 1.719 1.716 1.714 1.712Stiffness, G' (kip/in) 67.4 70.4 73.2 75.9 78.3 80.7 82.8 84.9 86.8Strength (kips/ft) 2.330 2.326 2.323 2.320 2.317 2.315 2.313 2.311 2.309Stiffness, G' (kip/in) 76.2 80.0 83.6 86.9 90.1 93.1 95.9 98.6 101.1Strength (kips/ft) 2.763 2.760 2.758 2.756 2.754 2.752 2.751 2.749 2.748Stiffness, G' (kip/in) 81.3 85.6 89.7 93.5 97.2 100.6 103.9 107.1 110.1Strength (kips/ft) 3.297 3.295 3.294 3.293 3.292 3.291 3.290 3.289 3.289Stiffness, G' (kip/in) 87.0 91.9 96.6 101.1 105.3 109.4 113.3 117.0 120.5Strength (kips/ft) 3.578 3.577 3.576 3.576 3.575 3.575 3.574 3.574 3.574Stiffness, G' (kip/in) 90.1 95.4 100.5 105.3 109.9 114.3 118.5 122.6 126.5Strength (kips/ft) 3.833 3.833 3.832 3.832 3.832 3.832 3.832 3.832 3.831Stiffness, G' (kip/in) 93.4 99.1 104.6 109.8 114.8 119.6 124.2 128.7 133.0Strength (kips/ft) 2.060 4.201 2.015 1.997 1.981 1.967 1.954 1.942 1.932Stiffness, G' (kip/in) 83.7 13.9 89.5 92.0 94.4 96.5 98.5 100.4 102.2Strength (kips/ft) 2.720 4.411 2.683 2.668 2.655 2.643 2.633 2.623 2.615Stiffness, G' (kip/in) 95.1 14.1 102.7 106.2 109.4 112.3 115.1 117.7 120.2Strength (kips/ft) 3.252 4.575 3.223 3.211 3.200 3.191 3.183 3.175 3.168Stiffness, G' (kip/in) 102.2 14.2 111.1 115.2 118.9 122.5 125.8 129.0 131.9Strength (kips/ft) 3.997 4.811 3.979 3.972 3.965 3.960 3.955 3.950 3.946Stiffness, G' (kip/in) 110.5 14.3 121.1 125.9 130.5 134.8 138.8 142.7 146.4Strength (kips/ft) 4.449 4.967 4.438 4.434 4.430 4.427 4.423 4.421 4.418Stiffness, G' (kip/in) 115.2 14.3 126.8 132.2 137.2 142.0 146.5 150.8 154.9Strength (kips/ft) 4.913 5.148 4.908 4.906 4.905 4.903 4.902 4.901 4.900Stiffness, G' (kip/in) 120.5 14.4 133.2 139.1 144.7 150.0 155.1 159.9 164.5Strength (kips/ft) 2.238 2.203 2.174 2.148 2.126 2.106 2.089 2.073 2.057Stiffness, G' (kip/in) 148.0 148.4 148.8 149.1 149.4 149.6 149.8 150.0 150.2Strength (kips/ft) 3.012 2.981 2.955 2.932 2.911 2.893 2.877 2.863 2.850Stiffness, G' (kip/in) 180.2 181.5 182.7 183.7 184.6 185.4 186.1 186.8 187.4Strength (kips/ft) 3.703 3.676 3.653 3.632 3.614 3.598 3.584 3.572 3.560Stiffness, G' (kip/in) 203.9 206.0 207.8 209.4 210.8 212.1 213.2 214.2 215.1Strength (kips/ft) 4.827 4.807 4.790 4.774 4.761 4.749 4.739 4.729 4.721Stiffness, G' (kip/in) 236.5 239.7 242.4 244.9 247.1 249.1 250.8 252.4 253.9Strength (kips/ft) 5.646 5.632 5.619 5.608 5.599 5.590 5.583 5.576 5.570Stiffness, G' (kip/in) 257.9 261.8 265.3 268.3 271.1 273.5 275.8 277.8 279.6Strength (kips/ft) 6.655 6.647 6.641 6.635 6.630 6.626 6.622 6.619 6.615Stiffness, G' (kip/in) 284.2 289.1 293.4 297.3 300.8 303.9 306.7 309.3 311.7Strength (kips/ft) 3.101 3.005 2.922 2.850 2.787 2.731 2.681 2.636 2.595Stiffness, G' (kip/in) 170.0 169.5 169.0 168.5 167.9 167.4 167.0 166.5 166.1Strength (kips/ft) 3.877 3.788 3.712 3.644 3.585 3.533 3.486 3.444 3.406Stiffness, G' (kip/in) 196.3 197.0 197.5 197.9 198.3 198.5 198.8 198.9 199.1Strength (kips/ft) 4.591 4.510 4.440 4.378 4.324 4.276 4.233 4.194 4.159Stiffness, G' (kip/in) 216.2 217.8 219.1 220.3 221.3 222.1 222.9 223.6 224.2Strength (kips/ft) 5.824 5.758 5.701 5.651 5.607 5.568 5.532 5.501 5.472Stiffness, G' (kip/in) 244.4 247.2 249.7 251.9 253.8 255.5 257.0 258.4 259.7Strength (kips/ft) 6.808 6.756 6.711 6.671 6.636 6.605 6.577 6.552 6.529Stiffness, G' (kip/in) 263.3 267.0 270.3 273.2 275.7 278.0 280.1 282.0 283.7Strength (kips/ft) 8.178 8.146 8.119 8.095 8.074 8.055 8.038 8.023 8.009Stiffness, G' (kip/in) 287.3 292.0 296.3 300.0 303.4 306.4 309.2 311.7 314.0

Nominal Shear Strength due to Panel Buckling (kips/ft)

6 6.5 7 7.5 8 8.5 9 9.5 1011.2 9.52 8.21 7.15 6.29 5.57 4.97 4.46 4.02

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

6 6.5 7 7.5 8 8.5 9 9.5 10

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

18

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.834 0.738 0.661 0.586 0.526 0.477 0.436 0.402 0.372Stiffness, G' (kip/in) 9.9 11.1 12.3 13.4 14.3 15.1 15.8 16.4 16.9Strength (kips/ft) 0.846 0.751 0.675 0.602 0.543 0.494 0.453 0.419 0.389Stiffness, G' (kip/in) 9.9 11.2 12.3 13.4 14.4 15.2 15.9 16.6 17.2Strength (kips/ft) 0.858 0.764 0.688 0.619 0.559 0.510 0.470 0.435 0.406Stiffness, G' (kip/in) 9.9 11.2 12.4 13.5 14.4 15.3 16.1 16.8 17.4Strength (kips/ft) 0.881 0.789 0.715 0.652 0.593 0.544 0.503 0.469 0.439Stiffness, G' (kip/in) 9.9 11.2 12.5 13.6 14.6 15.5 16.3 17.1 17.7Strength (kips/ft) 0.904 0.814 0.741 0.682 0.626 0.577 0.536 0.502 0.472Stiffness, G' (kip/in) 9.9 11.3 12.5 13.7 14.7 15.7 16.6 17.3 18.1Strength (kips/ft) 0.948 0.861 0.792 0.735 0.687 0.644 0.603 0.569 0.539Stiffness, G' (kip/in) 10.0 11.4 12.6 13.8 14.9 16.0 16.9 17.8 18.6Strength (kips/ft) 1.089 0.962 0.860 0.772 0.693 0.629 0.576 0.531 0.492Stiffness, G' (kip/in) 13.7 15.4 16.9 18.3 19.4 20.4 21.3 22.0 22.6Strength (kips/ft) 1.102 0.975 0.874 0.789 0.710 0.646 0.593 0.547 0.509Stiffness, G' (kip/in) 13.7 15.5 17.0 18.3 19.5 20.6 21.4 22.2 22.8Strength (kips/ft) 1.114 0.988 0.887 0.805 0.727 0.663 0.609 0.564 0.525Stiffness, G' (kip/in) 13.8 15.5 17.0 18.4 19.6 20.7 21.6 22.4 23.1Strength (kips/ft) 1.137 1.014 0.914 0.834 0.760 0.696 0.643 0.597 0.559Stiffness, G' (kip/in) 13.8 15.5 17.1 18.5 19.8 20.9 21.9 22.8 23.5Strength (kips/ft) 1.161 1.039 0.941 0.862 0.793 0.729 0.676 0.631 0.592Stiffness, G' (kip/in) 13.8 15.6 17.2 18.7 20.0 21.1 22.2 23.1 23.9Strength (kips/ft) 1.21 1.09 0.99 0.92 0.85 0.80 0.74 0.70 0.66Stiffness, G' (kip/in) 13.9 15.7 17.4 18.9 20.3 21.5 22.7 23.7 24.6Strength (kips/ft) 1.231 1.074 0.940 0.834 0.749 0.680 0.622 0.574 0.532Stiffness, G' (kip/in) 55.8 57.3 57.9 57.7 57.1 56.2 55.1 53.9 52.6Strength (kips/ft) 1.245 1.089 0.956 0.851 0.766 0.697 0.639 0.590 0.548Stiffness, G' (kip/in) 56.0 57.6 58.3 58.2 57.7 56.9 55.9 54.8 53.6Strength (kips/ft) 1.259 1.104 0.973 0.867 0.783 0.713 0.656 0.607 0.565Stiffness, G' (kip/in) 56.2 57.9 58.7 58.7 58.3 57.6 56.7 55.7 54.5Strength (kips/ft) 1.287 1.133 1.006 0.901 0.816 0.747 0.689 0.640 0.598Stiffness, G' (kip/in) 56.6 58.5 59.5 59.7 59.5 59.0 58.2 57.3 56.4Strength (kips/ft) 1.314 1.161 1.040 0.934 0.849 0.780 0.722 0.674 0.632Stiffness, G' (kip/in) 57.0 59.1 60.2 60.6 60.6 60.3 59.7 59.0 58.1Strength (kips/ft) 1.369 1.218 1.101 1.001 0.916 0.847 0.789 0.740 0.698Stiffness, G' (kip/in) 57.8 60.2 61.6 62.4 62.7 62.7 62.4 62.0 61.4Strength (kips/ft) 1.968 1.726 1.536 1.382 1.252 1.137 1.041 0.960 0.891Stiffness, G' (kip/in) 61.5 64.4 66.2 67.2 67.5 67.3 66.8 66.0 65.0Strength (kips/ft) 1.981 1.740 1.550 1.397 1.268 1.153 1.058 0.977 0.907Stiffness, G' (kip/in) 61.6 64.6 66.5 67.5 67.9 67.8 67.3 66.6 65.7Strength (kips/ft) 1.994 1.754 1.564 1.411 1.285 1.170 1.074 0.993 0.924Stiffness, G' (kip/in) 61.7 64.8 66.7 67.8 68.2 68.2 67.8 67.2 66.4Strength (kips/ft) 2.020 1.781 1.593 1.441 1.316 1.203 1.108 1.027 0.957Stiffness, G' (kip/in) 61.9 65.1 67.2 68.4 69.0 69.1 68.9 68.4 67.7Strength (kips/ft) 2.045 1.808 1.621 1.470 1.346 1.237 1.141 1.060 0.991Stiffness, G' (kip/in) 62.2 65.4 67.6 69.0 69.7 70.0 69.9 69.5 69.0Strength (kips/ft) 2.096 1.862 1.677 1.528 1.405 1.303 1.208 1.127 1.057Stiffness, G' (kip/in) 62.6 66.1 68.5 70.1 71.0 71.6 71.7 71.6 71.3

Nominal Shear Strength due to Panel Buckling (kips/ft)

3 3.5 4 4.5 5 5.5 6 6.5 715.0 11.0 8.45 6.68 5.41 4.47 3.76 3.20 2.76

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

3 3.5 4 4.5 5 5.5 6 6.5 7

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

19

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.888 0.791 0.710 0.643 0.588 0.541 0.500 0.466 0.435Stiffness, G' (kip/in) 18.2 19.5 20.6 21.5 22.3 22.9 23.4 23.8 24.0Strength (kips/ft) 0.902 0.808 0.726 0.660 0.604 0.557 0.517 0.482 0.452Stiffness, G' (kip/in) 18.3 19.6 20.8 21.7 22.6 23.2 23.8 24.2 24.5Strength (kips/ft) 0.916 0.824 0.743 0.676 0.621 0.574 0.534 0.499 0.468Stiffness, G' (kip/in) 18.4 19.7 20.9 21.9 22.8 23.5 24.1 24.6 25.0Strength (kips/ft) 0.942 0.858 0.776 0.710 0.654 0.607 0.567 0.532 0.502Stiffness, G' (kip/in) 18.5 19.9 21.2 22.3 23.3 24.1 24.8 25.4 25.9Strength (kips/ft) 0.969 0.887 0.810 0.743 0.688 0.641 0.600 0.566 0.535Stiffness, G' (kip/in) 18.6 20.1 21.5 22.6 23.7 24.6 25.4 26.1 26.7Strength (kips/ft) 1.021 0.941 0.875 0.810 0.754 0.707 0.667 0.632 0.602Stiffness, G' (kip/in) 18.9 20.5 21.9 23.2 24.4 25.4 26.4 27.2 28.0Strength (kips/ft) 1.156 1.042 0.935 0.848 0.776 0.714 0.662 0.616 0.576Stiffness, G' (kip/in) 24.8 26.4 27.7 28.8 29.6 30.2 30.7 31.0 31.2Strength (kips/ft) 1.170 1.058 0.952 0.865 0.792 0.731 0.678 0.633 0.593Stiffness, G' (kip/in) 24.9 26.5 27.9 29.0 29.9 30.6 31.1 31.5 31.8Strength (kips/ft) 1.184 1.072 0.968 0.881 0.809 0.747 0.695 0.649 0.609Stiffness, G' (kip/in) 25.0 26.6 28.1 29.2 30.2 31.0 31.6 32.0 32.3Strength (kips/ft) 1.211 1.101 1.002 0.915 0.842 0.781 0.728 0.683 0.643Stiffness, G' (kip/in) 25.1 26.9 28.4 29.7 30.7 31.6 32.3 32.9 33.4Strength (kips/ft) 1.238 1.129 1.035 0.948 0.876 0.814 0.762 0.716 0.676Stiffness, G' (kip/in) 25.3 27.1 28.7 30.1 31.2 32.2 33.0 33.7 34.3Strength (kips/ft) 1.291 1.184 1.095 1.015 0.942 0.881 0.828 0.783 0.743Stiffness, G' (kip/in) 25.6 27.6 29.3 30.8 32.1 33.3 34.3 35.2 35.9Strength (kips/ft) 1.269 1.125 1.010 0.916 0.838 0.772 0.715 0.666 0.623Stiffness, G' (kip/in) 73.7 72.4 70.7 68.7 66.7 64.7 62.6 60.7 58.8Strength (kips/ft) 1.285 1.142 1.027 0.933 0.855 0.789 0.732 0.683 0.640Stiffness, G' (kip/in) 74.3 73.1 71.5 69.7 67.8 65.9 63.9 62.0 60.2Strength (kips/ft) 1.302 1.158 1.044 0.950 0.872 0.805 0.749 0.699 0.656Stiffness, G' (kip/in) 74.9 73.8 72.4 70.7 68.9 67.0 65.2 63.4 61.6Strength (kips/ft) 1.335 1.192 1.077 0.983 0.905 0.839 0.782 0.733 0.690Stiffness, G' (kip/in) 76.0 75.2 74.0 72.5 70.9 69.3 67.6 66.0 64.4Strength (kips/ft) 1.369 1.225 1.110 1.016 0.938 0.872 0.815 0.766 0.723Stiffness, G' (kip/in) 77.2 76.6 75.6 74.3 72.9 71.4 69.9 68.4 67.0Strength (kips/ft) 1.431 1.292 1.177 1.083 1.005 0.939 0.882 0.833 0.790Stiffness, G' (kip/in) 79.3 79.1 78.5 77.6 76.6 75.4 74.3 73.1 71.9Strength (kips/ft) 2.067 1.859 1.687 1.532 1.402 1.293 1.199 1.117 1.046Stiffness, G' (kip/in) 86.3 86.2 85.4 84.2 82.7 80.9 79.1 77.2 75.3Strength (kips/ft) 2.081 1.873 1.703 1.548 1.419 1.309 1.215 1.134 1.063Stiffness, G' (kip/in) 86.7 86.7 86.0 84.9 83.4 81.8 80.1 78.3 76.4Strength (kips/ft) 2.095 1.888 1.718 1.565 1.436 1.326 1.232 1.151 1.079Stiffness, G' (kip/in) 87.1 87.2 86.6 85.5 84.2 82.6 81.0 79.2 77.5Strength (kips/ft) 2.124 1.918 1.748 1.598 1.469 1.359 1.265 1.184 1.113Stiffness, G' (kip/in) 87.8 88.1 87.7 86.8 85.6 84.2 82.7 81.2 79.6Strength (kips/ft) 2.152 1.947 1.778 1.632 1.502 1.393 1.299 1.217 1.146Stiffness, G' (kip/in) 88.5 88.9 88.7 88.0 87.0 85.8 84.5 83.0 81.6Strength (kips/ft) 2.209 2.005 1.838 1.698 1.569 1.459 1.365 1.284 1.213Stiffness, G' (kip/in) 89.8 90.6 90.7 90.3 89.7 88.7 87.7 86.5 85.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

4 4.5 5 5.5 6 6.5 7 7.5 811.47 9.060 7.339 6.065 5.096 4.343 3.744 3.262 2.867

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

4 4.5 5 5.5 6 6.5 7 7.5 8

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

20

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.935 0.847 0.774 0.712 0.659 0.613 0.573 0.537 0.506Stiffness, G' (kip/in) 34.8 35.5 36.1 36.3 36.4 36.4 36.2 35.9 35.6Strength (kips/ft) 0.951 0.864 0.790 0.729 0.676 0.630 0.590 0.554 0.523Stiffness, G' (kip/in) 35.2 36.0 36.6 37.0 37.2 37.3 37.2 37.0 36.8Strength (kips/ft) 0.968 0.880 0.807 0.745 0.692 0.646 0.606 0.571 0.539Stiffness, G' (kip/in) 35.5 36.5 37.2 37.7 38.0 38.1 38.2 38.1 37.9Strength (kips/ft) 1.001 0.914 0.840 0.779 0.726 0.680 0.640 0.604 0.573Stiffness, G' (kip/in) 36.2 37.4 38.3 38.9 39.4 39.7 39.9 40.1 40.1Strength (kips/ft) 1.035 0.947 0.874 0.812 0.759 0.713 0.673 0.637 0.606Stiffness, G' (kip/in) 36.9 38.2 39.2 40.1 40.7 41.2 41.6 41.8 42.0Strength (kips/ft) 1.099 1.014 0.940 0.879 0.826 0.780 0.740 0.704 0.673Stiffness, G' (kip/in) 38.1 39.6 41.0 42.1 43.0 43.8 44.5 45.0 45.5Strength (kips/ft) 1.230 1.115 1.020 0.939 0.870 0.810 0.757 0.711 0.670Stiffness, G' (kip/in) 45.7 46.4 46.8 46.9 46.8 46.5 46.0 45.5 44.9Strength (kips/ft) 1.247 1.132 1.037 0.956 0.887 0.827 0.774 0.728 0.687Stiffness, G' (kip/in) 46.2 47.0 47.5 47.7 47.6 47.4 47.1 46.7 46.2Strength (kips/ft) 1.263 1.149 1.053 0.973 0.903 0.843 0.791 0.744 0.703Stiffness, G' (kip/in) 46.6 47.5 48.1 48.4 48.5 48.4 48.2 47.8 47.4Strength (kips/ft) 1.297 1.182 1.087 1.006 0.937 0.877 0.824 0.778 0.737Stiffness, G' (kip/in) 47.4 48.5 49.3 49.8 50.1 50.2 50.1 50.0 49.7Strength (kips/ft) 1.329 1.215 1.120 1.039 0.970 0.910 0.857 0.811 0.770Stiffness, G' (kip/in) 48.2 49.4 50.4 51.1 51.5 51.8 52.0 52.0 51.9Strength (kips/ft) 1.387 1.282 1.187 1.106 1.037 0.977 0.924 0.878 0.837Stiffness, G' (kip/in) 49.5 51.1 52.4 53.4 54.2 54.8 55.2 55.6 55.8Strength (kips/ft) 1.328 1.205 1.102 0.999 0.940 0.876 0.819 0.769 0.725Stiffness, G' (kip/in) 94.4 90.4 86.7 82.4 79.8 76.7 73.8 71.0 68.5Strength (kips/ft) 1.345 1.222 1.119 1.016 0.957 0.892 0.836 0.786 0.741Stiffness, G' (kip/in) 95.7 91.9 88.3 84.2 81.6 78.6 75.7 73.1 70.6Strength (kips/ft) 1.362 1.238 1.135 1.032 0.974 0.909 0.852 0.802 0.758Stiffness, G' (kip/in) 97.0 93.4 89.8 85.9 83.4 80.4 77.7 75.1 72.7Strength (kips/ft) 1.395 1.272 1.169 1.066 1.007 0.942 0.886 0.836 0.791Stiffness, G' (kip/in) 99.6 96.2 92.9 89.2 86.8 84.0 81.5 79.0 76.8Strength (kips/ft) 1.428 1.305 1.202 1.099 1.040 0.976 0.919 0.869 0.825Stiffness, G' (kip/in) 102.1 98.9 95.8 92.3 90.1 87.5 85.1 82.8 80.7Strength (kips/ft) 1.495 1.372 1.269 1.166 1.107 1.042 0.986 0.936 0.891Stiffness, G' (kip/in) 106.7 104.1 101.4 98.4 96.4 94.2 92.0 90.0 88.1Strength (kips/ft) 2.206 2.010 1.840 1.697 1.573 1.466 1.373 1.290 1.217Stiffness, G' (kip/in) 118.0 114.4 110.8 107.1 103.6 100.2 96.9 93.8 90.9Strength (kips/ft) 2.221 2.027 1.857 1.713 1.590 1.483 1.390 1.307 1.234Stiffness, G' (kip/in) 119.0 115.5 112.0 108.4 105.0 101.7 98.5 95.5 92.6Strength (kips/ft) 2.236 2.044 1.874 1.730 1.607 1.500 1.406 1.324 1.250Stiffness, G' (kip/in) 119.9 116.5 113.1 109.7 106.4 103.1 100.1 97.1 94.3Strength (kips/ft) 2.267 2.077 1.907 1.763 1.640 1.533 1.440 1.357 1.284Stiffness, G' (kip/in) 121.7 118.6 115.4 112.2 109.0 106.0 103.1 100.3 97.6Strength (kips/ft) 2.297 2.110 1.940 1.797 1.673 1.566 1.473 1.390 1.317Stiffness, G' (kip/in) 123.5 120.6 117.6 114.6 111.6 108.7 106.0 103.3 100.8Strength (kips/ft) 2.357 2.172 2.007 1.863 1.740 1.633 1.540 1.457 1.384Stiffness, G' (kip/in) 126.9 124.4 121.8 119.2 116.5 114.0 111.5 109.2 106.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

5 5.5 6 6.5 7 7.5 8 8.5 911.54 9.53 8.01 6.83 5.89 5.13 4.51 3.99 3.56

Span (ft)

36/9

36

24

12

9

6

18

36/7

36

24

12

9

6

18

36/5

36

24

12

9

6

18

Span (ft)

5 5.5 6 6.5 7 7.5 8 8.5 9

36/4

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

21

Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.956 0.880 0.814 0.758 0.708 0.664 0.625 0.590 0.559Stiffness, G' (kip/in) 49.8 49.4 48.9 48.2 47.4 46.5 45.7 44.8 43.9Strength (kips/ft) 0.973 0.896 0.831 0.774 0.725 0.681 0.642 0.607 0.576Stiffness, G' (kip/in) 50.8 50.6 50.2 49.6 48.9 48.2 47.5 46.7 45.9Strength (kips/ft) 0.989 0.913 0.848 0.791 0.741 0.697 0.659 0.624 0.592Stiffness, G' (kip/in) 51.8 51.7 51.4 51.0 50.4 49.8 49.2 48.5 47.8Strength (kips/ft) 1.023 0.946 0.881 0.824 0.775 0.731 0.692 0.657 0.626Stiffness, G' (kip/in) 53.7 53.8 53.8 53.6 53.3 52.9 52.4 51.9 51.4Strength (kips/ft) 1.056 0.980 0.914 0.858 0.808 0.764 0.725 0.690 0.659Stiffness, G' (kip/in) 55.4 55.8 55.9 56.0 55.9 55.7 55.4 55.1 54.8Strength (kips/ft) 1.123 1.046 0.981 0.924 0.875 0.831 0.792 0.757 0.726Stiffness, G' (kip/in) 58.5 59.3 59.9 60.3 60.6 60.8 60.8 60.9 60.8Strength (kips/ft) 1.259 1.159 1.074 1.000 0.935 0.878 0.827 0.782 0.741Stiffness, G' (kip/in) 63.6 62.8 61.8 60.6 59.4 58.2 56.9 55.7 54.4Strength (kips/ft) 1.275 1.176 1.090 1.016 0.952 0.894 0.844 0.798 0.757Stiffness, G' (kip/in) 64.7 64.0 63.1 62.1 61.0 59.9 58.8 57.6 56.4Strength (kips/ft) 1.292 1.192 1.107 1.033 0.968 0.911 0.860 0.815 0.774Stiffness, G' (kip/in) 65.7 65.2 64.5 63.6 62.6 61.6 60.5 59.5 58.4Strength (kips/ft) 1.325 1.226 1.140 1.066 1.002 0.944 0.894 0.848 0.807Stiffness, G' (kip/in) 67.7 67.5 67.0 66.3 65.6 64.8 63.9 63.1 62.2Strength (kips/ft) 1.359 1.259 1.174 1.100 1.035 0.978 0.927 0.882 0.841Stiffness, G' (kip/in) 69.6 69.6 69.4 68.9 68.4 67.8 67.1 66.4 65.7Strength (kips/ft) 1.425 1.326 1.240 1.166 1.102 1.044 0.994 0.948 0.907Stiffness, G' (kip/in) 73.1 73.5 73.7 73.7 73.6 73.3 73.0 72.7 72.3Strength (kips/ft) 1.360 1.252 1.160 1.080 1.011 0.949 0.894 0.845 0.801Stiffness, G' (kip/in) 103.8 98.9 94.5 90.4 86.6 83.1 79.9 77.0 74.2Strength (kips/ft) 1.376 1.269 1.177 1.097 1.027 0.966 0.911 0.862 0.818Stiffness, G' (kip/in) 105.9 101.1 96.7 92.7 89.0 85.6 82.5 79.6 76.9Strength (kips/ft) 1.393 1.285 1.193 1.114 1.044 0.982 0.928 0.879 0.835Stiffness, G' (kip/in) 107.9 103.2 99.0 95.0 91.4 88.1 85.0 82.2 79.6Strength (kips/ft) 1.426 1.319 1.227 1.147 1.077 1.016 0.961 0.912 0.868Stiffness, G' (kip/in) 111.8 107.4 103.3 99.6 96.1 92.9 90.0 87.3 84.8Strength (kips/ft) 1.460 1.352 1.260 1.180 1.111 1.049 0.994 0.945 0.901Stiffness, G' (kip/in) 115.7 111.4 107.5 104.0 100.7 97.6 94.8 92.2 89.8Strength (kips/ft) 1.526 1.419 1.327 1.247 1.177 1.116 1.061 1.012 0.968Stiffness, G' (kip/in) 123.0 119.1 115.6 112.3 109.3 106.6 104.0 101.6 99.4Strength (kips/ft) 2.268 2.090 1.938 1.807 1.692 1.590 1.500 1.419 1.346Stiffness, G' (kip/in) 135.4 129.9 124.8 120.1 115.6 111.4 107.5 103.8 100.4Strength (kips/ft) 2.284 2.107 1.955 1.823 1.708 1.607 1.516 1.435 1.363Stiffness, G' (kip/in) 136.9 131.6 126.6 122.0 117.6 113.5 109.7 106.1 102.7Strength (kips/ft) 2.301 2.124 1.972 1.840 1.725 1.623 1.533 1.452 1.379Stiffness, G' (kip/in) 138.5 133.3 128.4 123.8 119.5 115.5 111.8 108.3 105.0Strength (kips/ft) 2.334 2.157 2.005 1.873 1.758 1.657 1.566 1.485 1.413Stiffness, G' (kip/in) 141.5 136.6 131.9 127.5 123.4 119.5 115.9 112.6 109.4Strength (kips/ft) 2.368 2.190 2.038 1.907 1.792 1.690 1.600 1.519 1.446Stiffness, G' (kip/in) 144.5 139.8 135.3 131.1 127.1 123.4 120.0 116.7 113.7Strength (kips/ft) 2.434 2.257 2.105 1.973 1.858 1.757 1.666 1.585 1.513Stiffness, G' (kip/in) 150.2 145.9 141.8 137.9 134.3 130.9 127.7 124.7 121.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

6 6.5 7 7.5 8 8.5 9 9.5 1011.18 9.52 8.21 7.15 6.29 5.57 4.97 4.46 4.02

Span (ft)

36/9

36

24

18

12

9

6

36/7

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/4

36

24

18

12

9

6

Span (ft)

6 6.5 7 7.5 8 8.5 9 9.5 10

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

22

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.834 0.750 0.683 0.622 0.569 0.526 0.491 0.460 0.434Stiffness, G' (kip/in) 9.9 11.2 12.5 13.7 14.8 15.8 16.8 17.8 18.7Strength (kips/ft) 0.884 0.804 0.740 0.687 0.640 0.597 0.562 0.531 0.505Stiffness, G' (kip/in) 10.0 11.4 12.8 14.0 15.3 16.4 17.6 18.6 19.6Strength (kips/ft) 0.932 0.855 0.794 0.744 0.702 0.668 0.633 0.602 0.576Stiffness, G' (kip/in) 10.1 11.5 13.0 14.3 15.6 16.8 18.0 19.2 20.3Strength (kips/ft) 1.020 0.951 0.895 0.849 0.811 0.779 0.752 0.728 0.708Stiffness, G' (kip/in) 10.2 11.7 13.2 14.6 16.0 17.3 18.6 19.9 21.1Strength (kips/ft) 1.101 1.038 0.987 0.946 0.911 0.882 0.857 0.835 0.816Stiffness, G' (kip/in) 10.3 11.8 13.4 14.8 16.2 17.6 19.0 20.3 21.6Strength (kips/ft) 1.237 1.186 1.145 1.112 1.084 1.060 1.039 1.021 1.006Stiffness, G' (kip/in) 10.4 12.0 13.5 15.1 16.5 18.0 19.4 20.8 22.2Strength (kips/ft) 1.089 0.974 0.882 0.808 0.737 0.679 0.630 0.589 0.554Stiffness, G' (kip/in) 13.7 15.5 17.1 18.7 20.1 21.4 22.6 23.7 24.7Strength (kips/ft) 1.141 1.029 0.940 0.868 0.808 0.750 0.701 0.660 0.625Stiffness, G' (kip/in) 13.9 15.8 17.5 19.2 20.7 22.2 23.5 24.8 26.0Strength (kips/ft) 1.190 1.082 0.996 0.925 0.867 0.819 0.772 0.731 0.696Stiffness, G' (kip/in) 14.0 15.9 17.8 19.5 21.2 22.7 24.2 25.6 27.0Strength (kips/ft) 1.283 1.183 1.102 1.036 0.981 0.935 0.896 0.863 0.833Stiffness, G' (kip/in) 14.2 16.2 18.2 20.0 21.8 23.5 25.1 26.7 28.2Strength (kips/ft) 1.370 1.277 1.202 1.140 1.089 1.046 1.009 0.977 0.949Stiffness, G' (kip/in) 14.3 16.4 18.4 20.3 22.2 24.0 25.7 27.3 28.9Strength (kips/ft) 1.52 1.44 1.38 1.33 1.28 1.25 1.21 1.19 1.16Stiffness, G' (kip/in) 14.5 16.6 18.7 20.7 22.6 24.5 26.4 28.1 29.9Strength (kips/ft) 1.231 1.088 0.967 0.870 0.793 0.729 0.677 0.632 0.594Stiffness, G' (kip/in) 55.8 58.1 59.6 60.6 61.3 61.6 61.7 61.7 61.6Strength (kips/ft) 1.290 1.150 1.038 0.941 0.864 0.800 0.748 0.703 0.665Stiffness, G' (kip/in) 57.8 60.8 63.0 64.7 66.0 66.9 67.6 68.2 68.6Strength (kips/ft) 1.348 1.211 1.103 1.012 0.935 0.871 0.819 0.774 0.736Stiffness, G' (kip/in) 59.5 63.0 65.8 68.0 69.8 71.2 72.4 73.4 74.2Strength (kips/ft) 1.462 1.329 1.226 1.143 1.075 1.013 0.961 0.916 0.878Stiffness, G' (kip/in) 62.1 66.5 70.1 73.1 75.7 77.8 79.7 81.4 82.8Strength (kips/ft) 1.571 1.443 1.344 1.264 1.198 1.144 1.098 1.058 1.020Stiffness, G' (kip/in) 64.0 69.0 73.2 76.8 79.9 82.6 85.0 87.1 89.0Strength (kips/ft) 1.775 1.658 1.566 1.492 1.432 1.381 1.339 1.302 1.270Stiffness, G' (kip/in) 66.7 72.5 77.5 81.9 85.7 89.1 92.2 94.9 97.4Strength (kips/ft) 1.968 1.739 1.559 1.414 1.295 1.186 1.095 1.018 0.953Stiffness, G' (kip/in) 61.5 64.9 67.3 69.0 70.1 70.8 71.3 71.5 71.5Strength (kips/ft) 2.023 1.797 1.620 1.476 1.359 1.257 1.166 1.089 1.024Stiffness, G' (kip/in) 62.6 66.4 69.4 71.6 73.2 74.5 75.4 76.1 76.6Strength (kips/ft) 2.077 1.855 1.679 1.538 1.422 1.325 1.237 1.160 1.095Stiffness, G' (kip/in) 63.6 67.8 71.1 73.8 75.9 77.6 78.9 80.0 80.9Strength (kips/ft) 2.183 1.967 1.797 1.659 1.546 1.451 1.371 1.302 1.237Stiffness, G' (kip/in) 65.2 70.0 74.0 77.3 80.1 82.4 84.4 86.1 87.6Strength (kips/ft) 2.285 2.076 1.911 1.777 1.666 1.574 1.496 1.428 1.370Stiffness, G' (kip/in) 66.4 71.8 76.2 80.0 83.3 86.1 88.6 90.7 92.6Strength (kips/ft) 2.478 2.284 2.128 2.002 1.898 1.811 1.736 1.672 1.617Stiffness, G' (kip/in) 68.3 74.3 79.4 83.9 87.9 91.3 94.4 97.2 99.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

3 3.5 4 4.5 5 5.5 6 6.5 715.0 11.0 8.45 6.68 5.41 4.47 3.76 3.20 2.76

Span (ft)

3 3.5 4 4.5 5 5.5 6 6.5 7

36/4

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/7

36

24

18

12

9

6

Span (ft)

36/9

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

23

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.920 0.842 0.771 0.713 0.664 0.623 0.588 0.558 0.531Stiffness, G' (kip/in) 18.5 20.1 21.6 23.0 24.2 25.4 26.4 27.4 28.4Strength (kips/ft) 0.994 0.923 0.864 0.806 0.758 0.717 0.681 0.651 0.624Stiffness, G' (kip/in) 19.1 20.9 22.5 24.1 25.6 27.0 28.3 29.5 30.7Strength (kips/ft) 1.065 0.997 0.941 0.894 0.851 0.810 0.775 0.744 0.718Stiffness, G' (kip/in) 19.5 21.4 23.2 24.9 26.5 28.1 29.5 30.9 32.3Strength (kips/ft) 1.199 1.137 1.085 1.042 1.004 0.972 0.944 0.920 0.898Stiffness, G' (kip/in) 20.0 22.1 24.0 25.9 27.7 29.4 31.1 32.7 34.3Strength (kips/ft) 1.321 1.264 1.217 1.177 1.143 1.114 1.088 1.065 1.045Stiffness, G' (kip/in) 20.3 22.5 24.5 26.5 28.4 30.3 32.1 33.8 35.5Strength (kips/ft) 1.532 1.485 1.447 1.414 1.386 1.361 1.340 1.321 1.304Stiffness, G' (kip/in) 20.7 23.0 25.1 27.2 29.3 31.3 33.2 35.1 36.9Strength (kips/ft) 1.188 1.088 0.996 0.918 0.852 0.797 0.749 0.708 0.672Stiffness, G' (kip/in) 25.2 27.1 28.9 30.5 31.9 33.2 34.4 35.4 36.4Strength (kips/ft) 1.264 1.166 1.085 1.011 0.946 0.890 0.843 0.801 0.765Stiffness, G' (kip/in) 25.9 28.1 30.1 32.0 33.7 35.3 36.7 38.1 39.4Strength (kips/ft) 1.337 1.242 1.164 1.098 1.039 0.984 0.936 0.895 0.859Stiffness, G' (kip/in) 26.4 28.8 31.0 33.1 35.0 36.8 38.5 40.0 41.5Strength (kips/ft) 1.477 1.388 1.314 1.252 1.199 1.153 1.113 1.078 1.046Stiffness, G' (kip/in) 27.2 29.8 32.2 34.5 36.7 38.8 40.8 42.6 44.4Strength (kips/ft) 1.609 1.525 1.456 1.397 1.347 1.304 1.266 1.233 1.204Stiffness, G' (kip/in) 27.7 30.4 33.0 35.5 37.8 40.1 42.3 44.3 46.3Strength (kips/ft) 1.846 1.774 1.713 1.662 1.618 1.580 1.547 1.517 1.492Stiffness, G' (kip/in) 28.3 31.2 34.0 36.6 39.2 41.7 44.1 46.3 48.5Strength (kips/ft) 1.307 1.176 1.072 0.986 0.915 0.855 0.803 0.758 0.719Stiffness, G' (kip/in) 76.3 76.6 76.5 76.2 75.7 75.1 74.6 73.9 73.3Strength (kips/ft) 1.400 1.270 1.165 1.080 1.008 0.948 0.896 0.852 0.812Stiffness, G' (kip/in) 81.5 82.6 83.3 83.7 83.9 84.0 83.9 83.8 83.7Strength (kips/ft) 1.482 1.363 1.258 1.173 1.102 1.041 0.990 0.945 0.906Stiffness, G' (kip/in) 85.7 87.5 88.9 89.9 90.7 91.3 91.7 92.0 92.3Strength (kips/ft) 1.643 1.531 1.439 1.360 1.288 1.228 1.177 1.132 1.093Stiffness, G' (kip/in) 92.4 95.3 97.7 99.6 101.3 102.6 103.8 104.8 105.7Strength (kips/ft) 1.798 1.690 1.602 1.528 1.466 1.413 1.363 1.319 1.279Stiffness, G' (kip/in) 97.4 101.1 104.2 106.9 109.1 111.1 112.8 114.4 115.7Strength (kips/ft) 2.092 1.992 1.910 1.841 1.783 1.733 1.690 1.653 1.619Stiffness, G' (kip/in) 104.4 109.2 113.3 116.9 120.1 122.9 125.4 127.6 129.6Strength (kips/ft) 2.100 1.904 1.743 1.601 1.479 1.375 1.286 1.209 1.142Stiffness, G' (kip/in) 88.0 88.9 89.3 89.3 89.0 88.5 87.9 87.2 86.5Strength (kips/ft) 2.179 1.986 1.827 1.695 1.572 1.469 1.380 1.303 1.235Stiffness, G' (kip/in) 91.3 92.9 94.0 94.6 95.0 95.1 95.0 94.9 94.6Strength (kips/ft) 2.258 2.067 1.910 1.779 1.666 1.562 1.473 1.396 1.329Stiffness, G' (kip/in) 94.1 96.3 98.0 99.2 100.1 100.7 101.1 101.4 101.5Strength (kips/ft) 2.413 2.226 2.073 1.945 1.837 1.744 1.660 1.583 1.516Stiffness, G' (kip/in) 98.7 101.9 104.5 106.5 108.2 109.6 110.8 111.7 112.5Strength (kips/ft) 2.563 2.382 2.232 2.107 2.001 1.910 1.832 1.763 1.702Stiffness, G' (kip/in) 102.3 106.2 109.5 112.2 114.5 116.5 118.2 119.7 121.0Strength (kips/ft) 2.850 2.680 2.538 2.420 2.319 2.233 2.157 2.091 2.033Stiffness, G' (kip/in) 107.6 112.5 116.7 120.4 123.6 126.3 128.8 131.0 133.0

Nominal Shear Strength due to Panel Buckling (kips/ft)

4 4.5 5 5.5 6 6.5 7 7.5 811.5 9.06 7.34 6.07 5.10 4.34 3.74 3.26 2.87

Span (ft)

4 4.5 5 5.5 6 6.5 7 7.5 8

36/4

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/7

36

24

18

12

9

6

Span (ft)

36/9

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

24

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.036 0.962 0.901 0.849 0.804 0.765 0.731 0.702 0.675Stiffness, G' (kip/in) 37.3 39.0 40.5 41.9 43.2 44.3 45.3 46.2 47.0Strength (kips/ft) 1.164 1.103 1.044 0.992 0.947 0.909 0.875 0.845 0.818Stiffness, G' (kip/in) 39.7 41.9 44.0 45.8 47.5 49.1 50.5 51.9 53.1Strength (kips/ft) 1.279 1.221 1.171 1.128 1.090 1.052 1.018 0.989 0.962Stiffness, G' (kip/in) 41.5 44.0 46.4 48.6 50.6 52.5 54.3 56.0 57.5Strength (kips/ft) 1.495 1.441 1.396 1.356 1.322 1.292 1.266 1.242 1.221Stiffness, G' (kip/in) 43.9 46.8 49.6 52.3 54.8 57.1 59.4 61.5 63.5Strength (kips/ft) 1.688 1.641 1.600 1.564 1.533 1.506 1.482 1.460 1.441Stiffness, G' (kip/in) 45.4 48.6 51.7 54.6 57.4 60.1 62.6 65.1 67.4Strength (kips/ft) 2.015 1.977 1.945 1.917 1.892 1.871 1.851 1.834 1.819Stiffness, G' (kip/in) 47.2 50.8 54.2 57.5 60.6 63.6 66.5 69.3 72.0Strength (kips/ft) 1.330 1.231 1.147 1.076 1.015 0.962 0.916 0.875 0.839Stiffness, G' (kip/in) 48.6 50.4 51.9 53.2 54.4 55.3 56.2 56.9 57.6Strength (kips/ft) 1.453 1.367 1.290 1.219 1.158 1.106 1.059 1.019 0.983Stiffness, G' (kip/in) 51.6 54.0 56.1 58.0 59.7 61.2 62.6 63.8 64.9Strength (kips/ft) 1.572 1.489 1.418 1.358 1.302 1.249 1.203 1.162 1.126Stiffness, G' (kip/in) 53.9 56.7 59.3 61.6 63.7 65.6 67.4 69.0 70.5Strength (kips/ft) 1.799 1.721 1.655 1.598 1.548 1.504 1.466 1.431 1.401Stiffness, G' (kip/in) 57.2 60.6 63.7 66.6 69.3 71.8 74.2 76.4 78.4Strength (kips/ft) 2.010 1.938 1.876 1.823 1.776 1.736 1.700 1.667 1.638Stiffness, G' (kip/in) 59.4 63.2 66.7 70.0 73.1 76.0 78.8 81.4 83.8Strength (kips/ft) 2.385 2.324 2.271 2.226 2.186 2.151 2.120 2.092 2.067Stiffness, G' (kip/in) 62.2 66.4 70.5 74.3 77.9 81.3 84.6 87.6 90.6Strength (kips/ft) 1.430 1.320 1.229 1.152 1.085 1.028 0.978 0.933 0.894Stiffness, G' (kip/in) 103.5 101.8 100.1 98.4 96.9 95.4 94.1 92.8 91.6Strength (kips/ft) 1.573 1.464 1.372 1.295 1.229 1.171 1.121 1.077 1.037Stiffness, G' (kip/in) 114.4 113.6 112.7 111.7 110.8 109.9 109.1 108.3 107.5Strength (kips/ft) 1.717 1.607 1.516 1.439 1.372 1.315 1.265 1.220 1.181Stiffness, G' (kip/in) 123.8 123.7 123.4 123.1 122.7 122.3 121.9 121.5 121.1Strength (kips/ft) 1.974 1.878 1.797 1.725 1.659 1.602 1.552 1.507 1.468Stiffness, G' (kip/in) 138.8 139.9 140.8 141.4 141.9 142.3 142.6 142.9 143.1Strength (kips/ft) 2.219 2.127 2.048 1.981 1.924 1.873 1.828 1.789 1.754Stiffness, G' (kip/in) 150.5 152.5 154.2 155.6 156.8 157.8 158.7 159.4 160.1Strength (kips/ft) 2.680 2.595 2.523 2.461 2.408 2.361 2.320 2.283 2.251Stiffness, G' (kip/in) 167.3 170.7 173.5 176.0 178.2 180.1 181.8 183.4 184.7Strength (kips/ft) 2.298 2.125 1.967 1.833 1.718 1.619 1.531 1.454 1.386Stiffness, G' (kip/in) 124.5 122.7 120.8 118.8 116.9 115.0 113.2 111.5 109.8Strength (kips/ft) 2.426 2.256 2.111 1.977 1.862 1.762 1.675 1.598 1.530Stiffness, G' (kip/in) 132.5 131.5 130.4 129.2 127.9 126.7 125.4 124.2 123.1Strength (kips/ft) 2.553 2.385 2.242 2.120 2.005 1.906 1.818 1.741 1.673Stiffness, G' (kip/in) 139.4 139.2 138.8 138.2 137.5 136.8 136.0 135.3 134.5Strength (kips/ft) 2.802 2.638 2.499 2.380 2.276 2.186 2.105 2.028 1.960Stiffness, G' (kip/in) 150.9 151.9 152.6 153.1 153.3 153.5 153.5 153.5 153.4Strength (kips/ft) 3.043 2.884 2.749 2.633 2.532 2.444 2.366 2.297 2.236Stiffness, G' (kip/in) 160.1 162.1 163.6 164.8 165.8 166.6 167.3 167.8 168.3Strength (kips/ft) 3.503 3.354 3.227 3.118 3.023 2.940 2.867 2.801 2.743Stiffness, G' (kip/in) 173.8 177.1 179.9 182.3 184.3 186.1 187.6 189.0 190.2

Nominal Shear Strength due to Panel Buckling (kips/ft)

5 5.5 6 6.5 7 7.5 8 8.5 911.5 9.53 8.01 6.83 5.89 5.13 4.51 3.99 3.56

36/4

36

24

12

9

6

18

Span (ft)

5 5.5 6 6.5 7 7.5 8 8.5 9

36/5

36

24

12

9

6

18

36/7

36

24

12

9

6

18

Span (ft)

36/9

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

25

Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.140 1.078 1.025 0.978 1.140 0.902 0.871 0.842 0.817Stiffness, G' (kip/in) 57.7 59.0 60.1 61.1 57.7 62.6 63.3 63.9 64.4Strength (kips/ft) 1.333 1.279 1.225 1.179 1.333 1.103 1.071 1.043 1.018Stiffness, G' (kip/in) 64.1 66.1 67.9 69.5 64.1 72.3 73.5 74.6 75.6Strength (kips/ft) 1.499 1.449 1.405 1.366 1.499 1.302 1.272 1.244 1.218Stiffness, G' (kip/in) 68.8 71.3 73.7 75.8 68.8 79.6 81.2 82.8 84.2Strength (kips/ft) 1.806 1.760 1.721 1.686 1.806 1.628 1.604 1.581 1.561Stiffness, G' (kip/in) 75.3 78.6 81.7 84.6 75.3 89.8 92.2 94.4 96.5Strength (kips/ft) 2.079 2.039 2.004 1.973 2.079 1.921 1.899 1.879 1.862Stiffness, G' (kip/in) 79.6 83.5 87.1 90.5 79.6 96.7 99.6 102.3 104.8Strength (kips/ft) 2.528 2.497 2.471 2.447 2.528 2.408 2.391 2.376 2.362Stiffness, G' (kip/in) 85.0 89.5 93.8 97.9 85.0 105.4 108.9 112.2 115.4Strength (kips/ft) 1.443 1.357 1.284 1.221 1.165 1.116 1.072 1.034 0.998Stiffness, G' (kip/in) 72.3 73.2 74.0 74.6 75.1 75.5 75.7 76.0 76.1Strength (kips/ft) 1.634 1.558 1.485 1.421 1.366 1.317 1.273 1.234 1.199Stiffness, G' (kip/in) 79.7 81.4 83.0 84.3 85.5 86.5 87.4 88.2 88.9Strength (kips/ft) 1.806 1.733 1.671 1.616 1.567 1.518 1.474 1.435 1.400Stiffness, G' (kip/in) 85.4 87.9 90.0 91.9 93.7 95.2 96.6 97.9 99.1Strength (kips/ft) 2.131 2.064 2.005 1.954 1.909 1.868 1.832 1.799 1.770Stiffness, G' (kip/in) 93.9 97.3 100.3 103.2 105.7 108.1 110.3 112.3 114.2Strength (kips/ft) 2.432 2.370 2.316 2.268 2.226 2.189 2.155 2.125 2.098Stiffness, G' (kip/in) 99.8 103.8 107.6 111.0 114.2 117.2 119.9 122.5 125.0Strength (kips/ft) 2.957 2.906 2.861 2.821 2.786 2.755 2.727 2.702 2.679Stiffness, G' (kip/in) 107.4 112.4 117.0 121.3 125.3 129.1 132.6 136.0 139.2Strength (kips/ft) 1.544 1.450 1.371 1.301 1.241 1.187 1.140 1.097 1.059Stiffness, G' (kip/in) 121.2 118.6 116.2 114.0 111.9 110.1 108.4 106.8 105.3Strength (kips/ft) 1.744 1.651 1.571 1.502 1.442 1.388 1.341 1.298 1.260Stiffness, G' (kip/in) 137.9 136.0 134.3 132.6 131.1 129.8 128.5 127.3 126.2Strength (kips/ft) 1.945 1.852 1.772 1.703 1.642 1.589 1.541 1.499 1.461Stiffness, G' (kip/in) 152.4 151.2 150.0 148.9 147.9 146.9 146.0 145.1 144.3Strength (kips/ft) 2.317 2.235 2.163 2.101 2.044 1.990 1.943 1.900 1.862Stiffness, G' (kip/in) 176.4 176.3 176.0 175.8 175.5 175.2 175.0 174.7 174.4Strength (kips/ft) 2.664 2.585 2.516 2.457 2.404 2.357 2.315 2.278 2.244Stiffness, G' (kip/in) 195.5 196.2 196.7 197.1 197.5 197.7 198.0 198.2 198.3Strength (kips/ft) 3.311 3.239 3.177 3.122 3.074 3.032 2.994 2.959 2.928Stiffness, G' (kip/in) 223.8 225.7 227.4 228.8 230.1 231.2 232.2 233.1 233.9Strength (kips/ft) 2.452 2.289 2.149 2.028 1.922 1.828 1.745 1.671 1.604Stiffness, G' (kip/in) 148.8 145.4 142.2 139.3 136.5 133.9 131.4 129.2 127.0Strength (kips/ft) 2.641 2.489 2.350 2.229 2.123 2.029 1.946 1.872 1.805Stiffness, G' (kip/in) 162.0 159.4 157.0 154.7 152.5 150.5 148.6 146.8 145.1Strength (kips/ft) 2.823 2.675 2.547 2.429 2.323 2.230 2.147 2.072 2.005Stiffness, G' (kip/in) 173.6 171.8 170.0 168.3 166.6 165.1 163.6 162.3 160.9Strength (kips/ft) 3.180 3.036 2.912 2.803 2.707 2.622 2.545 2.474 2.407Stiffness, G' (kip/in) 193.2 192.6 191.9 191.1 190.4 189.6 188.9 188.2 187.5Strength (kips/ft) 3.526 3.387 3.266 3.160 3.067 2.984 2.910 2.843 2.783Stiffness, G' (kip/in) 209.1 209.4 209.5 209.5 209.5 209.4 209.3 209.1 208.9Strength (kips/ft) 4.182 4.053 3.940 3.842 3.754 3.677 3.607 3.544 3.488Stiffness, G' (kip/in) 233.3 234.9 236.3 237.5 238.5 239.3 240.1 240.7 241.3

Nominal Shear Strength due to Panel Buckling (kips/ft)

6 6.5 7 7.5 6 8.5 9 9.5 1011.2 9.52 8.21 7.15 11.18 5.57 4.97 4.46 4.02

Span (ft)

6 6.5 7 7.5 6 8.5 9 9.5 10

36/4

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/7

36

24

18

12

9

6

Span (ft)

36/9

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

26

Design Thickness 0.0299 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.129 0.123 0.118 0.114 0.110 0.106 0.103 0.100 0.097Stiffness, G' (kip/in) 6.91 7.09 7.25 7.38 7.50 7.60 7.69 7.76 7.82Strength (kips/ft) 0.146 0.140 0.135 0.130 0.126 0.123 0.120 0.116 0.114Stiffness, G' (kip/in) 7.05 7.26 7.44 7.60 7.75 7.88 7.99 8.09 8.18Strength (kips/ft) 0.162 0.157 0.152 0.147 0.143 0.139 0.136 0.133 0.130Stiffness, G' (kip/in) 7.18 7.41 7.61 7.80 7.97 8.12 8.26 8.38 8.50Strength (kips/ft) 0.196 0.190 0.185 0.180 0.176 0.173 0.170 0.166 0.164Stiffness, G' (kip/in) 7.40 7.66 7.91 8.13 8.34 8.53 8.71 8.88 9.04Strength (kips/ft) 0.229 0.223 0.218 0.214 0.210 0.206 0.203 0.200 0.197Stiffness, G' (kip/in) 7.59 7.88 8.15 8.41 8.65 8.88 9.09 9.29 9.48Strength (kips/ft) 0.291 0.286 0.281 0.276 0.272 0.269 0.266 0.263 0.260Stiffness, G' (kip/in) 7.88 8.21 8.53 8.84 9.13 9.41 9.67 9.93 10.2Strength (kips/ft) 0.161 0.153 0.147 0.141 0.135 0.130 0.126 0.122 0.118Stiffness, G' (kip/in) 23.8 23.2 22.7 22.1 21.6 21.0 20.5 20.1 19.6Strength (kips/ft) 0.177 0.170 0.163 0.157 0.152 0.147 0.143 0.139 0.135Stiffness, G' (kip/in) 24.7 24.1 23.6 23.1 22.6 22.1 21.6 21.2 20.8Strength (kips/ft) 0.194 0.187 0.180 0.174 0.169 0.164 0.159 0.155 0.152Stiffness, G' (kip/in) 25.5 25.0 24.5 24.0 23.6 23.1 22.7 22.3 21.9Strength (kips/ft) 0.227 0.220 0.213 0.207 0.202 0.197 0.193 0.189 0.185Stiffness, G' (kip/in) 27.0 26.6 26.3 25.9 25.5 25.1 24.7 24.4 24.0Strength (kips/ft) 0.261 0.253 0.247 0.241 0.235 0.230 0.226 0.222 0.218Stiffness, G' (kip/in) 28.5 28.2 27.9 27.6 27.2 26.9 26.6 26.3 26.0Strength (kips/ft) 0.33 0.32 0.31 0.31 0.30 0.30 0.29 0.29 0.28Stiffness, G' (kip/in) 31.1 31.0 30.8 30.6 30.5 30.3 30.1 29.9 29.7Strength (kips/ft) 0.288 0.273 0.260 0.248 0.237 0.227 0.218 0.210 0.203Stiffness, G' (kip/in) 32.0 31.5 31.0 30.4 29.9 29.3 28.7 28.2 27.6Strength (kips/ft) 0.305 0.290 0.276 0.264 0.254 0.244 0.235 0.227 0.220Stiffness, G' (kip/in) 32.6 32.2 31.7 31.2 30.6 30.1 29.6 29.0 28.5Strength (kips/ft) 0.321 0.306 0.293 0.281 0.270 0.261 0.252 0.244 0.236Stiffness, G' (kip/in) 33.2 32.8 32.3 31.9 31.4 30.9 30.4 29.9 29.4Strength (kips/ft) 0.355 0.340 0.326 0.314 0.304 0.294 0.285 0.277 0.270Stiffness, G' (kip/in) 34.3 33.9 33.6 33.2 32.8 32.4 32.0 31.5 31.1Strength (kips/ft) 0.388 0.373 0.360 0.348 0.337 0.327 0.318 0.310 0.303Stiffness, G' (kip/in) 35.3 35.1 34.8 34.5 34.1 33.8 33.4 33.1 32.7Strength (kips/ft) 0.455 0.440 0.426 0.414 0.404 0.394 0.385 0.377 0.370Stiffness, G' (kip/in) 37.2 37.1 37.0 36.8 36.6 36.4 36.2 35.9 35.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 127.12 6.30 5.62 5.05 4.56 4.13 3.76 3.44 3.16

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

27

Design Thickness 0.0359 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.138 0.132 0.127 0.123 0.119 0.115 0.112 0.108 0.105Stiffness, G' (kip/in) 9.90 10.00 10.08 10.1 10.2 10.2 10.2 10.2 10.2Strength (kips/ft) 0.154 0.149 0.144 0.139 0.135 0.132 0.128 0.125 0.122Stiffness, G' (kip/in) 10.23 10.4 10.5 10.6 10.7 10.7 10.8 10.8 10.8Strength (kips/ft) 0.171 0.165 0.160 0.156 0.152 0.148 0.145 0.142 0.139Stiffness, G' (kip/in) 10.5 10.7 10.9 11.0 11.1 11.2 11.3 11.4 11.4Strength (kips/ft) 0.204 0.199 0.194 0.189 0.185 0.182 0.178 0.175 0.172Stiffness, G' (kip/in) 11.0 11.3 11.5 11.7 11.9 12.0 12.2 12.3 12.4Strength (kips/ft) 0.238 0.232 0.227 0.223 0.219 0.215 0.212 0.208 0.205Stiffness, G' (kip/in) 11.5 11.8 12.0 12.3 12.5 12.7 12.9 13.1 13.3Strength (kips/ft) 0.304 0.299 0.294 0.289 0.285 0.282 0.278 0.275 0.272Stiffness, G' (kip/in) 12.2 12.6 12.9 13.2 13.5 13.8 14.1 14.4 14.6Strength (kips/ft) 0.171 0.164 0.158 0.152 0.146 0.141 0.137 0.133 0.129Stiffness, G' (kip/in) 26.5 25.7 25.0 24.3 23.7 23.0 22.4 21.9 21.4Strength (kips/ft) 0.188 0.181 0.174 0.168 0.163 0.158 0.154 0.149 0.146Stiffness, G' (kip/in) 27.7 27.0 26.3 25.6 25.0 24.4 23.8 23.3 22.8Strength (kips/ft) 0.205 0.198 0.191 0.185 0.180 0.175 0.170 0.166 0.162Stiffness, G' (kip/in) 28.8 28.1 27.5 26.9 26.3 25.7 25.2 24.7 24.2Strength (kips/ft) 0.238 0.231 0.224 0.218 0.213 0.208 0.204 0.199 0.196Stiffness, G' (kip/in) 31.0 30.4 29.8 29.3 28.8 28.3 27.8 27.3 26.9Strength (kips/ft) 0.271 0.264 0.258 0.252 0.246 0.241 0.237 0.233 0.229Stiffness, G' (kip/in) 33.1 32.6 32.1 31.6 31.1 30.7 30.2 29.8 29.4Strength (kips/ft) 0.338 0.331 0.324 0.318 0.313 0.308 0.304 0.299 0.296Stiffness, G' (kip/in) 36.9 36.5 36.2 35.8 35.5 35.1 34.8 34.5 34.2Strength (kips/ft) 0.307 0.293 0.280 0.268 0.257 0.248 0.239 0.231 0.223Stiffness, G' (kip/in) 37.2 36.3 35.4 34.6 33.8 33.0 32.2 31.5 30.8Strength (kips/ft) 0.324 0.309 0.296 0.285 0.274 0.264 0.255 0.247 0.240Stiffness, G' (kip/in) 38.0 37.2 36.4 35.6 34.8 34.1 33.4 32.7 32.0Strength (kips/ft) 0.341 0.326 0.313 0.301 0.291 0.281 0.272 0.264 0.256Stiffness, G' (kip/in) 38.9 38.1 37.4 36.6 35.9 35.2 34.5 33.8 33.2Strength (kips/ft) 0.374 0.359 0.346 0.335 0.324 0.314 0.305 0.297 0.290Stiffness, G' (kip/in) 40.6 39.9 39.2 38.5 37.9 37.2 36.6 36.0 35.4Strength (kips/ft) 0.407 0.393 0.380 0.368 0.357 0.348 0.339 0.331 0.323Stiffness, G' (kip/in) 42.2 41.6 41.0 40.4 39.8 39.2 38.6 38.1 37.6Strength (kips/ft) 0.474 0.459 0.446 0.435 0.424 0.414 0.405 0.397 0.390Stiffness, G' (kip/in) 45.1 44.7 44.2 43.8 43.3 42.9 42.4 42.0 41.6

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.39 6.64 5.99 5.43 4.95 4.53 4.16 3.83 3.54

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

28

Design Thickness 0.0478 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.162 0.155 0.150 0.145 0.140 0.136 0.132 0.128 0.125Stiffness, G' (kip/in) 15.0 14.9 14.8 14.7 14.6 14.5 14.3 14.2 14.0Strength (kips/ft) 0.178 0.172 0.167 0.161 0.157 0.153 0.149 0.145 0.142Stiffness, G' (kip/in) 15.8 15.8 15.7 15.7 15.6 15.5 15.4 15.3 15.2Strength (kips/ft) 0.195 0.189 0.183 0.178 0.174 0.169 0.165 0.162 0.158Stiffness, G' (kip/in) 16.6 16.6 16.6 16.5 16.5 16.5 16.4 16.4 16.3Strength (kips/ft) 0.228 0.222 0.217 0.211 0.207 0.203 0.199 0.195 0.192Stiffness, G' (kip/in) 17.9 18.0 18.1 18.1 18.2 18.2 18.3 18.3 18.3Strength (kips/ft) 0.262 0.255 0.250 0.245 0.240 0.236 0.232 0.228 0.225Stiffness, G' (kip/in) 19.0 19.2 19.4 19.5 19.7 19.8 19.9 20.0 20.0Strength (kips/ft) 0.328 0.322 0.317 0.311 0.307 0.303 0.299 0.295 0.292Stiffness, G' (kip/in) 20.9 21.3 21.6 21.9 22.1 22.4 22.6 22.8 23.0Strength (kips/ft) 0.202 0.194 0.187 1.162 0.174 0.168 0.163 0.158 0.154Stiffness, G' (kip/in) 30.8 29.8 28.9 45.6 27.2 26.5 25.8 25.1 24.5Strength (kips/ft) 0.219 0.211 0.204 1.173 0.191 0.185 0.180 0.175 0.171Stiffness, G' (kip/in) 32.4 31.5 30.6 45.7 29.0 28.3 27.6 27.0 26.4Strength (kips/ft) 0.236 0.228 0.220 1.185 0.207 0.202 0.197 0.192 0.187Stiffness, G' (kip/in) 34.0 33.1 32.3 45.8 30.7 30.0 29.4 28.8 28.2Strength (kips/ft) 0.269 0.261 0.254 1.207 0.241 0.235 0.230 0.225 0.221Stiffness, G' (kip/in) 37.2 36.3 35.5 46.0 34.1 33.5 32.8 32.3 31.7Strength (kips/ft) 0.302 0.294 0.287 1.228 0.274 0.268 0.263 0.258 0.254Stiffness, G' (kip/in) 40.2 39.4 38.7 46.2 37.3 36.7 36.2 35.6 35.1Strength (kips/ft) 0.369 0.361 0.354 1.271 0.341 0.335 0.330 0.325 0.321Stiffness, G' (kip/in) 45.8 45.2 44.6 46.6 43.4 42.9 42.4 41.9 41.5Strength (kips/ft) 0.365 0.349 0.335 0.322 0.310 2.010 0.288 0.279 0.270Stiffness, G' (kip/in) 44.8 43.5 42.2 41.1 40.0 49.8 37.9 37.0 36.1Strength (kips/ft) 0.381 0.366 0.351 0.338 0.326 2.020 0.305 0.296 0.287Stiffness, G' (kip/in) 46.2 44.9 43.7 42.6 41.5 49.9 39.5 38.6 37.7Strength (kips/ft) 0.398 0.382 0.368 0.355 0.343 2.030 0.322 0.312 0.303Stiffness, G' (kip/in) 47.5 46.3 45.1 44.0 43.0 49.9 41.0 40.2 39.3Strength (kips/ft) 0.431 0.416 0.401 0.388 0.376 2.049 0.355 0.346 0.337Stiffness, G' (kip/in) 50.1 48.9 47.9 46.8 45.9 50.0 44.0 43.2 42.4Strength (kips/ft) 0.465 0.449 0.435 0.422 0.410 2.067 0.388 0.379 0.370Stiffness, G' (kip/in) 52.6 51.5 50.5 49.5 48.6 50.1 46.9 46.2 45.4Strength (kips/ft) 0.531 0.516 0.501 0.488 0.476 2.104 0.455 0.446 0.437Stiffness, G' (kip/in) 57.3 56.4 55.5 54.7 53.9 50.3 52.4 51.7 51.1

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 149.18 8.33 7.59 6.94 6.37 5.87 5.43 5.04 4.68

Span (ft)

24/7

36

24

12

9

6

18

24/5

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

24/3

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

29

Design Thickness 0.0598 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.181 0.175 0.169 0.164 0.159 0.154 0.150 0.146 0.142Stiffness, G' (kip/in) 18.9 18.7 18.4 18.1 17.8 17.6 17.3 17.1 16.8Strength (kips/ft) 0.198 0.192 0.186 0.180 0.175 0.171 0.166 0.162 0.159Stiffness, G' (kip/in) 20.3 20.0 19.8 19.6 19.4 19.1 18.9 18.7 18.5Strength (kips/ft) 0.215 0.208 0.202 0.197 0.192 0.187 0.183 0.179 0.175Stiffness, G' (kip/in) 21.5 21.3 21.2 21.0 20.8 20.6 20.4 20.3 20.1Strength (kips/ft) 0.248 0.242 0.236 0.230 0.225 0.221 0.216 0.212 0.209Stiffness, G' (kip/in) 23.8 23.7 23.7 23.6 23.5 23.4 23.3 23.2 23.1Strength (kips/ft) 0.281 0.275 0.269 0.264 0.259 0.254 0.250 0.246 0.242Stiffness, G' (kip/in) 25.9 25.9 25.9 25.9 25.9 25.9 25.9 25.8 25.8Strength (kips/ft) 0.348 0.342 0.336 0.330 0.325 0.321 0.316 0.312 0.309Stiffness, G' (kip/in) 29.5 29.7 29.8 30.0 30.1 30.2 30.3 30.4 30.5Strength (kips/ft) 0.228 0.219 0.211 0.204 0.198 0.192 0.186 0.181 0.176Stiffness, G' (kip/in) 33.3 32.3 31.3 30.4 29.5 28.8 28.0 27.3 26.7Strength (kips/ft) 0.244 0.236 0.228 0.221 0.214 0.208 0.203 0.197 0.193Stiffness, G' (kip/in) 35.4 34.3 33.4 32.5 31.7 30.9 30.2 29.5 28.9Strength (kips/ft) 0.261 0.253 0.245 0.238 0.231 0.225 0.219 0.214 0.209Stiffness, G' (kip/in) 37.4 36.4 35.5 34.6 33.8 33.0 32.3 31.7 31.0Strength (kips/ft) 0.294 0.286 0.278 0.271 0.264 0.258 0.253 0.247 0.243Stiffness, G' (kip/in) 41.3 40.4 39.5 38.7 37.9 37.2 36.5 35.9 35.3Strength (kips/ft) 0.328 0.319 0.311 0.304 0.298 0.292 0.286 0.281 0.276Stiffness, G' (kip/in) 45.1 44.2 43.4 42.6 41.9 41.2 40.5 39.9 39.4Strength (kips/ft) 0.394 0.386 0.378 0.371 0.364 0.358 0.353 0.347 0.343Stiffness, G' (kip/in) 52.3 51.5 50.8 50.1 49.4 48.8 48.2 47.7 47.2Strength (kips/ft) 1.064 1.020 0.978 0.941 0.906 0.873 0.843 0.815 0.789Stiffness, G' (kip/in) 54.2 52.6 51.1 49.7 48.3 47.1 45.9 44.7 43.7Strength (kips/ft) 1.081 1.036 0.995 0.957 0.922 0.890 0.860 0.832 0.806Stiffness, G' (kip/in) 55.9 54.4 52.9 51.5 50.2 48.9 47.7 46.6 45.6Strength (kips/ft) 1.098 1.053 1.012 0.974 0.939 0.907 0.877 0.849 0.823Stiffness, G' (kip/in) 57.6 56.1 54.6 53.3 52.0 50.8 49.6 48.5 47.5Strength (kips/ft) 1.131 1.086 1.045 1.007 0.972 0.940 0.910 0.882 0.856Stiffness, G' (kip/in) 60.8 59.4 58.0 56.7 55.5 54.3 53.2 52.2 51.2Strength (kips/ft) 1.164 1.120 1.078 1.041 1.006 0.973 0.943 0.915 0.889Stiffness, G' (kip/in) 64.0 62.6 61.3 60.0 58.9 57.8 56.7 55.7 54.8Strength (kips/ft) 1.231 1.186 1.145 1.107 1.072 1.040 1.010 0.982 0.956Stiffness, G' (kip/in) 70.0 68.8 67.6 66.4 65.4 64.4 63.4 62.5 61.6

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.6 9.69 8.90 8.20 7.58 7.03 6.54 6.09 5.69

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

30

Design Thickness 0.0299 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.197 0.194 0.191 0.188 0.186 0.184 0.182 0.180 0.179Stiffness, G' (kip/in) 7.95 8.32 8.68 9.03 9.37 9.70 10.01 10.32 10.62Strength (kips/ft) 0.268 0.265 0.262 0.259 0.256 0.254 0.252 0.250 0.248Stiffness, G' (kip/in) 8.38 8.80 9.21 9.61 10.00 10.38 10.76 11.12 11.48Strength (kips/ft) 0.324 0.321 0.318 0.315 0.313 0.311 0.309 0.307 0.305Stiffness, G' (kip/in) 8.63 9.08 9.52 9.95 10.38 10.79 11.20 11.60 11.99Strength (kips/ft) 0.418 0.416 0.413 0.411 0.409 0.408 0.406 0.405 0.403Stiffness, G' (kip/in) 8.91 9.40 9.87 10.34 10.80 11.26 11.70 12.15 12.58Strength (kips/ft) 0.491 0.489 0.487 0.486 0.484 0.483 0.482 0.481 0.480Stiffness, G' (kip/in) 9.07 9.57 10.07 10.56 11.04 11.51 11.98 12.45 12.91Strength (kips/ft) 0.589 0.588 0.587 0.586 0.585 0.584 0.583 0.583 0.582Stiffness, G' (kip/in) 9.24 9.76 10.28 10.79 11.29 11.79 12.28 12.77 13.3Strength (kips/ft) 0.229 0.224 0.219 0.215 0.211 0.208 0.205 0.202 0.200Stiffness, G' (kip/in) 31.9 32.0 32.2 32.3 32.3 32.4 32.5 32.5 32.6Strength (kips/ft) 0.300 0.294 0.290 0.286 0.282 0.279 0.276 0.273 0.271Stiffness, G' (kip/in) 37.1 37.5 37.9 38.2 38.5 38.8 39.0 39.3 39.5Strength (kips/ft) 0.371 0.365 0.361 0.357 0.353 0.350 0.347 0.344 0.342Stiffness, G' (kip/in) 41.1 41.7 42.3 42.8 43.3 43.7 44.2 44.5 44.9Strength (kips/ft) 0.502 0.497 0.492 0.488 0.484 0.481 0.478 0.475 0.472Stiffness, G' (kip/in) 46.8 47.8 48.7 49.5 50.3 51.0 51.7 52.3 52.9Strength (kips/ft) 0.616 0.611 0.607 0.603 0.600 0.597 0.594 0.591 0.589Stiffness, G' (kip/in) 50.7 52.0 53.1 54.1 55.1 56.0 56.9 57.7 58.4Strength (kips/ft) 0.81 0.81 0.80 0.80 0.80 0.80 0.79 0.79 0.79Stiffness, G' (kip/in) 55.8 57.3 58.8 60.1 61.4 62.6 63.7 64.7 65.8Strength (kips/ft) 0.356 0.343 0.332 0.322 0.313 0.305 0.297 0.291 0.284Stiffness, G' (kip/in) 37.7 37.9 38.0 38.0 38.1 38.1 38.1 38.1 38.0Strength (kips/ft) 0.427 0.414 0.403 0.393 0.384 0.376 0.368 0.362 0.355Stiffness, G' (kip/in) 41.6 42.0 42.4 42.7 43.0 43.2 43.4 43.6 43.7Strength (kips/ft) 0.498 0.485 0.474 0.464 0.455 0.447 0.439 0.433 0.426Stiffness, G' (kip/in) 44.7 45.3 45.9 46.4 46.9 47.3 47.7 48.0 48.3Strength (kips/ft) 0.633 0.621 0.610 0.600 0.591 0.583 0.576 0.569 0.563Stiffness, G' (kip/in) 49.2 50.2 51.1 51.9 52.7 53.4 54.1 54.7 55.2Strength (kips/ft) 0.756 0.744 0.734 0.725 0.716 0.709 0.702 0.695 0.690Stiffness, G' (kip/in) 52.5 53.7 54.9 55.9 56.9 57.8 58.6 59.4 60.2Strength (kips/ft) 0.980 0.970 0.961 0.953 0.945 0.939 0.933 0.927 0.922Stiffness, G' (kip/in) 56.8 58.4 59.8 61.2 62.4 63.6 64.7 65.8 66.8

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 127.12 6.30 5.62 5.05 4.56 4.13 3.76 3.44 3.16

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

31

Design Thickness 0.0359 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.240 0.237 0.235 0.232 0.230 0.228 0.227 0.225 0.224Stiffness, G' (kip/in) 12.47 12.92 13.35 13.8 14.2 14.5 14.9 15.3 15.6Strength (kips/ft) 0.330 0.327 0.324 0.321 0.319 0.317 0.315 0.313 0.311Stiffness, G' (kip/in) 13.48 14.0 14.5 15.0 15.5 16.0 16.5 16.9 17.4Strength (kips/ft) 0.402 0.399 0.396 0.394 0.392 0.390 0.388 0.387 0.385Stiffness, G' (kip/in) 14.1 14.7 15.3 15.8 16.4 16.9 17.5 18.0 18.5Strength (kips/ft) 0.521 0.519 0.517 0.515 0.514 0.512 0.511 0.510 0.508Stiffness, G' (kip/in) 14.8 15.5 16.1 16.8 17.4 18.0 18.6 19.2 19.8Strength (kips/ft) 0.611 0.610 0.608 0.607 0.606 0.605 0.604 0.603 0.602Stiffness, G' (kip/in) 15.2 15.9 16.6 17.3 18.0 18.6 19.3 19.9 20.5Strength (kips/ft) 0.727 0.726 0.725 0.724 0.724 0.723 0.723 0.722 0.722Stiffness, G' (kip/in) 15.7 16.4 17.1 17.9 18.6 19.3 20.0 20.7 21.3Strength (kips/ft) 0.274 0.269 0.265 0.261 0.258 0.255 0.252 0.249 0.247Stiffness, G' (kip/in) 38.7 38.7 38.6 38.6 38.5 38.5 38.4 38.4 38.3Strength (kips/ft) 0.367 0.363 0.358 0.355 0.351 0.348 0.345 0.343 0.340Stiffness, G' (kip/in) 46.4 46.6 46.8 46.9 47.1 47.2 47.4 47.5 47.6Strength (kips/ft) 0.461 0.456 0.452 0.448 0.445 0.442 0.439 0.436 0.434Stiffness, G' (kip/in) 52.5 52.9 53.3 53.7 54.0 54.3 54.6 54.8 55.1Strength (kips/ft) 0.627 0.623 0.618 0.615 0.611 0.608 0.605 0.602 0.600Stiffness, G' (kip/in) 61.7 62.4 63.2 63.8 64.4 65.0 65.6 66.0 66.5Strength (kips/ft) 0.774 0.770 0.766 0.763 0.760 0.757 0.754 0.752 0.750Stiffness, G' (kip/in) 68.2 69.3 70.2 71.1 72.0 72.8 73.5 74.2 74.8Strength (kips/ft) 1.020 1.017 1.014 1.011 1.009 1.007 1.005 1.003 1.001Stiffness, G' (kip/in) 77.0 78.4 79.7 81.0 82.1 83.2 84.2 85.2 86.1Strength (kips/ft) 0.410 0.398 0.387 0.378 0.369 0.361 0.354 0.347 0.341Stiffness, G' (kip/in) 46.5 46.4 46.2 46.0 45.8 45.7 45.5 45.3 45.1Strength (kips/ft) 0.503 0.491 0.481 0.471 0.462 0.454 0.447 0.441 0.434Stiffness, G' (kip/in) 52.6 52.8 52.9 52.9 53.0 53.0 53.0 53.0 53.0Strength (kips/ft) 0.596 0.585 0.574 0.564 0.556 0.548 0.541 0.534 0.528Stiffness, G' (kip/in) 57.6 58.0 58.3 58.6 58.8 59.1 59.3 59.4 59.6Strength (kips/ft) 0.771 0.760 0.750 0.740 0.732 0.724 0.717 0.710 0.704Stiffness, G' (kip/in) 65.3 66.0 66.7 67.3 67.9 68.4 68.9 69.3 69.7Strength (kips/ft) 0.932 0.921 0.911 0.903 0.895 0.887 0.880 0.874 0.869Stiffness, G' (kip/in) 70.9 71.9 72.9 73.7 74.6 75.3 76.0 76.7 77.3Strength (kips/ft) 1.222 1.212 1.204 1.196 1.190 1.183 1.177 1.172 1.167Stiffness, G' (kip/in) 78.6 80.0 81.3 82.6 83.7 84.8 85.8 86.7 87.6

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.39 6.64 5.99 5.43 4.95 4.53 4.16 3.83 3.54

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

32

Design Thickness 0.0478 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.339 0.337 0.334 0.332 0.330 0.329 0.327 0.326 0.324Stiffness, G' (kip/in) 22.0 22.5 23.0 23.4 23.9 24.3 24.7 25.1 25.4Strength (kips/ft) 0.468 0.465 0.463 0.460 0.458 0.456 0.454 0.452 0.451Stiffness, G' (kip/in) 24.9 25.6 26.2 26.9 27.5 28.1 28.7 29.2 29.8Strength (kips/ft) 0.574 0.571 0.569 0.567 0.565 0.563 0.562 0.560 0.559Stiffness, G' (kip/in) 26.8 27.6 28.4 29.2 29.9 30.7 31.4 32.0 32.7Strength (kips/ft) 0.743 0.741 0.740 0.738 0.737 0.736 0.734 0.733 0.732Stiffness, G' (kip/in) 29.1 30.1 31.1 32.1 33.0 33.9 34.7 35.6 36.4Strength (kips/ft) 0.864 0.863 0.862 0.861 0.860 0.859 0.858 0.857 0.856Stiffness, G' (kip/in) 30.5 31.6 32.7 33.8 34.8 35.8 36.8 37.7 38.7Strength (kips/ft) 1.009 1.009 1.008 1.008 1.007 1.007 1.006 1.006 1.005Stiffness, G' (kip/in) 32.1 33.3 34.5 35.7 36.9 38.0 39.1 40.2 41.3Strength (kips/ft) 0.380 0.375 0.371 0.368 0.364 0.361 0.358 0.356 0.353Stiffness, G' (kip/in) 49.3 49.0 48.8 48.6 48.4 48.2 48.0 47.8 47.6Strength (kips/ft) 0.523 0.519 0.515 0.511 0.508 0.505 0.502 0.499 0.497Stiffness, G' (kip/in) 61.0 61.0 61.0 60.9 60.9 60.8 60.8 60.7 60.7Strength (kips/ft) 0.665 0.660 0.655 0.651 0.648 0.644 0.641 0.638 0.635Stiffness, G' (kip/in) 70.9 71.0 71.2 71.3 71.4 71.5 71.6 71.7 71.7Strength (kips/ft) 0.908 0.903 0.899 0.896 0.892 0.889 0.886 0.883 0.881Stiffness, G' (kip/in) 86.4 86.9 87.3 87.7 88.1 88.5 88.8 89.1 89.4Strength (kips/ft) 1.123 1.119 1.116 1.112 1.109 1.107 1.104 1.102 1.099Stiffness, G' (kip/in) 98.1 98.8 99.6 100.2 100.8 101.4 101.9 102.4 102.9Strength (kips/ft) 1.468 1.466 1.463 1.461 1.458 1.456 1.455 1.453 1.451Stiffness, G' (kip/in) 114.5 115.7 116.8 117.9 118.8 119.7 120.6 121.4 122.1Strength (kips/ft) 0.542 0.530 0.519 0.509 0.500 0.491 0.483 0.476 0.469Stiffness, G' (kip/in) 60.2 59.7 59.1 58.7 58.2 57.7 57.3 56.9 56.5Strength (kips/ft) 0.686 0.674 0.663 0.653 0.643 0.635 0.627 0.620 0.613Stiffness, G' (kip/in) 70.2 69.9 69.6 69.4 69.1 68.9 68.6 68.4 68.2Strength (kips/ft) 0.829 0.817 0.806 0.796 0.787 0.778 0.770 0.763 0.756Stiffness, G' (kip/in) 78.6 78.6 78.5 78.5 78.4 78.3 78.3 78.2 78.1Strength (kips/ft) 1.089 1.077 1.067 1.057 1.048 1.040 1.032 1.025 1.019Stiffness, G' (kip/in) 92.2 92.5 92.8 93.1 93.4 93.6 93.8 94.0 94.2Strength (kips/ft) 1.330 1.319 1.309 1.300 1.292 1.284 1.277 1.271 1.265Stiffness, G' (kip/in) 102.6 103.2 103.8 104.4 104.9 105.4 105.8 106.3 106.6Strength (kips/ft) 1.756 1.747 1.739 1.731 1.724 1.718 1.712 1.706 1.701Stiffness, G' (kip/in) 117.5 118.6 119.7 120.6 121.5 122.4 123.2 123.9 124.6

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 149.18 8.33 7.59 6.94 6.37 5.87 5.43 5.04 4.68

Span (ft)

24/7

36

24

12

9

6

18

24/5

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

24/3

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

33

Design Thickness 0.0598 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.449 0.447 0.445 0.444 0.442 0.440 0.439 0.438 0.437Stiffness, G' (kip/in) 31.8 32.3 32.7 33.1 33.5 33.9 34.3 34.6 34.9Strength (kips/ft) 0.619 0.617 0.615 0.612 0.611 0.609 0.607 0.605 0.604Stiffness, G' (kip/in) 37.6 38.4 39.0 39.7 40.3 40.9 41.5 42.1 42.6Strength (kips/ft) 0.761 0.759 0.757 0.755 0.754 0.752 0.751 0.749 0.748Stiffness, G' (kip/in) 41.7 42.6 43.5 44.4 45.2 46.0 46.7 47.5 48.2Strength (kips/ft) 0.981 0.979 0.978 0.977 0.975 0.974 0.973 0.972 0.972Stiffness, G' (kip/in) 47.0 48.3 49.4 50.6 51.7 52.7 53.8 54.8 55.7Strength (kips/ft) 1.130 1.129 1.128 1.127 1.126 1.126 1.125 1.124 1.124Stiffness, G' (kip/in) 50.4 51.8 53.2 54.5 55.8 57.0 58.3 59.4 60.6Strength (kips/ft) 1.300 1.300 1.299 1.299 1.299 1.298 1.298 1.298 1.297Stiffness, G' (kip/in) 54.3 56.0 57.6 59.2 60.7 62.2 63.7 65.1 66.5Strength (kips/ft) 0.495 0.491 0.488 0.484 0.481 0.478 0.475 0.473 0.470Stiffness, G' (kip/in) 57.5 57.2 56.8 56.5 56.2 55.9 55.7 55.4 55.2Strength (kips/ft) 0.696 0.692 0.688 0.685 0.682 0.679 0.676 0.674 0.671Stiffness, G' (kip/in) 72.8 72.6 72.5 72.3 72.1 72.0 71.8 71.7 71.5Strength (kips/ft) 0.885 0.880 0.876 0.872 0.869 0.865 0.862 0.859 0.857Stiffness, G' (kip/in) 86.0 86.0 85.9 85.9 85.9 85.8 85.8 85.7 85.7Strength (kips/ft) 1.216 1.212 1.209 1.205 1.202 1.199 1.196 1.194 1.191Stiffness, G' (kip/in) 107.5 107.8 108.0 108.2 108.4 108.6 108.7 108.9 109.0Strength (kips/ft) 1.504 1.500 1.497 1.494 1.491 1.489 1.486 1.484 1.482Stiffness, G' (kip/in) 124.3 124.8 125.3 125.7 126.1 126.5 126.8 127.1 127.4Strength (kips/ft) 1.948 1.946 1.944 1.942 1.940 1.938 1.936 1.935 1.933Stiffness, G' (kip/in) 148.9 149.8 150.7 151.4 152.2 152.8 153.4 154.0 154.6Strength (kips/ft) 0.680 0.668 0.657 0.647 0.638 0.629 0.621 0.613 0.606Stiffness, G' (kip/in) 70.5 69.8 69.1 68.4 67.8 67.2 66.6 66.1 65.5Strength (kips/ft) 0.881 0.869 0.858 0.848 0.838 0.830 0.821 0.814 0.807Stiffness, G' (kip/in) 84.0 83.5 83.0 82.5 82.1 81.6 81.2 80.9 80.5Strength (kips/ft) 1.079 1.066 1.055 1.045 1.035 1.026 1.018 1.010 1.003Stiffness, G' (kip/in) 95.7 95.4 95.1 94.8 94.5 94.3 94.0 93.8 93.5Strength (kips/ft) 1.435 1.424 1.413 1.404 1.395 1.386 1.379 1.371 1.365Stiffness, G' (kip/in) 115.0 115.1 115.1 115.1 115.1 115.2 115.2 115.1 115.1Strength (kips/ft) 1.765 1.755 1.745 1.736 1.728 1.720 1.713 1.706 1.700Stiffness, G' (kip/in) 130.3 130.7 131.0 131.3 131.5 131.7 132.0 132.1 132.3Strength (kips/ft) 2.336 2.327 2.320 2.312 2.306 2.299 2.294 2.288 2.283Stiffness, G' (kip/in) 153.0 153.8 154.5 155.2 155.8 156.4 157.0 157.5 158.0

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.6 9.69 8.90 8.20 7.58 7.03 6.54 6.09 5.69

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

34

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.628 0.625 0.623 0.620 0.618 0.616 0.614 0.611 0.609Stiffness, G' (kip/in) 8.68 9.15 9.61 10.06 10.50 10.94 11.38 11.80 12.22Strength (kips/ft) 0.859 0.855 0.851 0.848 0.845 0.842 0.840 0.838 0.836Stiffness, G' (kip/in) 9.00 9.50 9.99 10.47 10.95 11.43 11.89 12.35 12.81Strength (kips/ft) 1.044 1.040 1.038 1.035 1.033 1.030 1.028 1.027 1.025Stiffness, G' (kip/in) 9.15 9.67 10.18 10.68 11.18 11.67 12.16 12.64 13.11Strength (kips/ft) 1.313 1.311 1.309 1.308 1.306 1.305 1.304 1.302 1.301Stiffness, G' (kip/in) 9.31 9.84 10.37 10.89 11.40 11.91 12.42 12.92 13.42Strength (kips/ft) 1.484 1.483 1.482 1.481 1.480 1.479 1.478 1.477 1.477Stiffness, G' (kip/in) 9.38 9.92 10.46 10.99 11.52 12.04 12.55 13.07 13.57Strength (kips/ft) 1.666 1.665 1.665 1.664 1.664 1.663 1.663 1.663 1.662Stiffness, G' (kip/in) 9.46 10.01 10.55 11.09 11.63 12.16 12.69 13.21 13.7Strength (kips/ft) 0.707 0.699 0.693 0.687 0.681 0.676 0.672 0.668 0.664Stiffness, G' (kip/in) 42.2 43.1 43.9 44.7 45.4 46.1 46.7 47.3 47.9Strength (kips/ft) 0.996 0.989 0.982 0.976 0.970 0.966 0.961 0.957 0.953Stiffness, G' (kip/in) 49.0 50.2 51.3 52.4 53.4 54.3 55.2 56.0 56.8Strength (kips/ft) 1.256 1.247 1.240 1.233 1.227 1.221 1.216 1.211 1.207Stiffness, G' (kip/in) 53.2 54.7 56.0 57.3 58.5 59.6 60.7 61.7 62.6Strength (kips/ft) 1.704 1.697 1.690 1.684 1.679 1.674 1.670 1.666 1.662Stiffness, G' (kip/in) 58.3 60.0 61.7 63.2 64.6 66.0 67.3 68.6 69.7Strength (kips/ft) 2.077 2.071 2.065 2.061 2.056 2.052 2.049 2.046 2.042Stiffness, G' (kip/in) 61.2 63.1 64.9 66.6 68.2 69.8 71.2 72.6 73.9Strength (kips/ft) 2.62 2.62 2.61 2.61 2.61 2.60 2.60 2.60 2.60Stiffness, G' (kip/in) 64.4 66.5 68.5 70.4 72.2 74.0 75.6 77.2 78.6Strength (kips/ft) 1.021 0.995 0.972 0.951 0.932 0.915 0.900 0.886 0.873Stiffness, G' (kip/in) 45.9 46.8 47.6 48.3 49.0 49.6 50.2 50.8 51.3Strength (kips/ft) 1.310 1.284 1.261 1.240 1.222 1.205 1.189 1.175 1.163Stiffness, G' (kip/in) 51.2 52.5 53.6 54.6 55.6 56.5 57.4 58.2 59.0Strength (kips/ft) 1.581 1.555 1.532 1.512 1.493 1.477 1.461 1.447 1.435Stiffness, G' (kip/in) 54.8 56.2 57.6 58.8 60.0 61.1 62.2 63.2 64.1Strength (kips/ft) 2.070 2.047 2.026 2.007 1.991 1.975 1.961 1.948 1.937Stiffness, G' (kip/in) 59.1 60.9 62.5 64.0 65.5 66.9 68.2 69.4 70.6Strength (kips/ft) 2.511 2.490 2.472 2.455 2.440 2.426 2.414 2.402 2.392Stiffness, G' (kip/in) 61.7 63.6 65.4 67.2 68.8 70.3 71.8 73.1 74.4Strength (kips/ft) 3.243 3.227 3.213 3.200 3.189 3.178 3.168 3.160 3.152Stiffness, G' (kip/in) 64.7 66.8 68.8 70.7 72.5 74.2 75.9 77.4 78.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 127.12 6.30 5.62 5.05 4.56 4.13 3.76 3.44 3.16

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

35

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.811 0.808 0.804 0.801 0.798 0.795 0.793 0.790 0.787Stiffness, G' (kip/in) 14.27 14.91 15.53 16.1 16.7 17.3 17.9 18.5 19.0Strength (kips/ft) 1.112 1.107 1.102 1.098 1.094 1.091 1.088 1.085 1.082Stiffness, G' (kip/in) 15.05 15.7 16.4 17.1 17.8 18.4 19.1 19.7 20.3Strength (kips/ft) 1.357 1.353 1.349 1.346 1.342 1.340 1.337 1.335 1.332Stiffness, G' (kip/in) 15.4 16.2 16.9 17.6 18.3 19.0 19.7 20.4 21.0Strength (kips/ft) 1.722 1.719 1.717 1.714 1.712 1.710 1.709 1.707 1.706Stiffness, G' (kip/in) 15.8 16.6 17.4 18.1 18.9 19.6 20.3 21.0 21.7Strength (kips/ft) 1.959 1.957 1.956 1.954 1.953 1.952 1.951 1.949 1.949Stiffness, G' (kip/in) 16.0 16.8 17.6 18.4 19.2 19.9 20.6 21.4 22.1Strength (kips/ft) 2.217 2.216 2.216 2.215 2.214 2.214 2.213 2.213 2.213Stiffness, G' (kip/in) 16.3 17.1 17.9 18.7 19.4 20.2 21.0 21.7 22.5Strength (kips/ft) 0.905 0.897 0.889 0.881 0.875 0.869 0.864 0.858 0.854Stiffness, G' (kip/in) 54.8 55.6 56.3 57.0 57.6 58.1 58.7 59.2 59.7Strength (kips/ft) 1.274 1.265 1.258 1.250 1.244 1.238 1.232 1.227 1.223Stiffness, G' (kip/in) 65.6 66.7 67.7 68.7 69.5 70.4 71.2 71.9 72.6Strength (kips/ft) 1.612 1.602 1.592 1.584 1.577 1.570 1.564 1.558 1.552Stiffness, G' (kip/in) 72.7 74.0 75.3 76.5 77.6 78.6 79.6 80.5 81.4Strength (kips/ft) 2.197 2.188 2.181 2.174 2.167 2.161 2.156 2.151 2.146Stiffness, G' (kip/in) 81.5 83.2 84.8 86.3 87.7 89.0 90.3 91.4 92.6Strength (kips/ft) 2.692 2.685 2.678 2.672 2.667 2.662 2.657 2.653 2.649Stiffness, G' (kip/in) 86.8 88.7 90.5 92.2 93.8 95.3 96.7 98.1 99.4Strength (kips/ft) 3.429 3.424 3.420 3.416 3.413 3.409 3.406 3.404 3.401Stiffness, G' (kip/in) 92.7 94.9 97.0 99.0 100.8 102.6 104.2 105.8 107.3Strength (kips/ft) 1.281 1.253 1.227 1.204 1.183 1.163 1.146 1.129 1.114Stiffness, G' (kip/in) 60.1 60.7 61.4 61.9 62.4 62.9 63.3 63.7 64.1Strength (kips/ft) 1.650 1.622 1.596 1.573 1.551 1.532 1.514 1.498 1.483Stiffness, G' (kip/in) 69.0 70.0 71.0 71.9 72.7 73.5 74.2 74.9 75.5Strength (kips/ft) 2.002 1.974 1.948 1.925 1.904 1.885 1.867 1.850 1.835Stiffness, G' (kip/in) 75.1 76.4 77.6 78.8 79.8 80.8 81.8 82.7 83.5Strength (kips/ft) 2.639 2.613 2.589 2.568 2.548 2.530 2.514 2.499 2.485Stiffness, G' (kip/in) 82.9 84.5 86.1 87.6 89.0 90.3 91.5 92.7 93.8Strength (kips/ft) 3.218 3.195 3.173 3.154 3.136 3.120 3.105 3.092 3.079Stiffness, G' (kip/in) 87.6 89.6 91.4 93.0 94.6 96.1 97.6 98.9 100.2Strength (kips/ft) 4.195 4.176 4.160 4.145 4.131 4.118 4.106 4.096 4.086Stiffness, G' (kip/in) 93.2 95.4 97.4 99.4 101.2 103.0 104.6 106.2 107.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.39 6.64 5.99 5.43 4.95 4.53 4.16 3.83 3.54

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

36

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.128 1.123 1.119 1.115 1.111 1.108 1.105 1.102 1.099Stiffness, G' (kip/in) 27.5 28.4 29.3 30.2 31.1 31.9 32.7 33.5 34.3Strength (kips/ft) 1.540 1.537 1.533 1.530 1.527 1.524 1.521 1.519 1.517Stiffness, G' (kip/in) 30.0 31.1 32.2 33.2 34.2 35.2 36.2 37.2 38.1Strength (kips/ft) 1.879 1.876 1.873 1.870 1.868 1.866 1.864 1.862 1.860Stiffness, G' (kip/in) 31.4 32.6 33.7 34.9 36.0 37.1 38.2 39.2 40.2Strength (kips/ft) 2.362 2.360 2.358 2.357 2.355 2.354 2.352 2.351 2.350Stiffness, G' (kip/in) 32.8 34.1 35.4 36.6 37.9 39.1 40.3 41.4 42.6Strength (kips/ft) 2.660 2.659 2.658 2.657 2.656 2.655 2.654 2.653 2.652Stiffness, G' (kip/in) 33.6 34.9 36.3 37.6 38.9 40.1 41.4 42.6 43.8Strength (kips/ft) 2.968 2.967 2.967 2.966 2.966 2.966 2.965 2.965 2.965Stiffness, G' (kip/in) 34.3 35.8 37.2 38.5 39.9 41.2 42.6 43.9 45.1Strength (kips/ft) 1.243 1.235 1.228 1.222 1.216 1.210 1.205 1.201 1.196Stiffness, G' (kip/in) 75.4 76.0 76.6 77.1 77.5 78.0 78.4 78.8 79.1Strength (kips/ft) 1.782 1.772 1.763 1.755 1.747 1.740 1.734 1.728 1.723Stiffness, G' (kip/in) 93.8 94.7 95.5 96.3 97.0 97.7 98.3 98.9 99.5Strength (kips/ft) 2.248 2.239 2.231 2.223 2.216 2.210 2.204 2.198 2.193Stiffness, G' (kip/in) 106.8 107.9 109.0 110.0 110.9 111.8 112.6 113.4 114.1Strength (kips/ft) 3.075 3.067 3.061 3.054 3.048 3.043 3.038 3.033 3.029Stiffness, G' (kip/in) 123.8 125.3 126.8 128.1 129.4 130.6 131.7 132.7 133.7Strength (kips/ft) 3.753 3.747 3.742 3.737 3.732 3.728 3.724 3.720 3.716Stiffness, G' (kip/in) 134.5 136.3 138.0 139.6 141.1 142.5 143.8 145.1 146.3Strength (kips/ft) 4.721 4.717 4.714 4.711 4.708 4.705 4.702 4.700 4.698Stiffness, G' (kip/in) 147.2 149.4 151.5 153.4 155.2 156.9 158.5 160.0 161.4Strength (kips/ft) 1.686 1.657 1.631 1.607 1.585 1.565 1.546 1.529 1.513Stiffness, G' (kip/in) 83.4 83.8 84.1 84.4 84.7 84.9 85.1 85.3 85.5Strength (kips/ft) 2.226 2.197 2.171 2.147 2.125 2.105 2.086 2.069 2.053Stiffness, G' (kip/in) 99.4 100.1 100.8 101.4 102.0 102.6 103.1 103.5 104.0Strength (kips/ft) 2.724 2.696 2.670 2.646 2.624 2.604 2.585 2.568 2.552Stiffness, G' (kip/in) 110.8 111.9 112.9 113.8 114.6 115.4 116.1 116.8 117.4Strength (kips/ft) 3.641 3.616 3.592 3.570 3.550 3.532 3.515 3.499 3.485Stiffness, G' (kip/in) 126.2 127.7 129.1 130.4 131.6 132.8 133.8 134.8 135.8Strength (kips/ft) 4.463 4.440 4.419 4.400 4.382 4.366 4.351 4.337 4.324Stiffness, G' (kip/in) 136.1 137.9 139.6 141.2 142.6 144.0 145.3 146.5 147.7Strength (kips/ft) 5.810 5.793 5.777 5.763 5.750 5.738 5.726 5.716 5.706Stiffness, G' (kip/in) 148.1 150.3 152.3 154.2 156.0 157.7 159.3 160.8 162.2

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 149.18 8.33 7.59 6.94 6.37 5.87 5.43 5.04 4.68

Span (ft)

24/7

36

24

12

9

6

18

24/5

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

24/3

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

37

Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.452 1.448 1.445 1.442 1.439 1.437 1.434 1.432 1.430Stiffness, G' (kip/in) 43.5 44.6 45.7 46.8 47.8 48.8 49.7 50.6 51.5Strength (kips/ft) 1.991 1.988 1.986 1.983 1.981 1.979 1.977 1.975 1.973Stiffness, G' (kip/in) 49.3 50.7 52.0 53.4 54.6 55.9 57.1 58.3 59.4Strength (kips/ft) 2.422 2.420 2.418 2.416 2.414 2.412 2.411 2.409 2.408Stiffness, G' (kip/in) 52.6 54.2 55.7 57.2 58.7 60.1 61.5 62.8 64.1Strength (kips/ft) 3.013 3.012 3.011 3.010 3.009 3.008 3.007 3.006 3.005Stiffness, G' (kip/in) 56.3 58.1 59.8 61.6 63.2 64.9 66.5 68.0 69.6Strength (kips/ft) 3.362 3.361 3.361 3.360 3.359 3.359 3.358 3.358 3.357Stiffness, G' (kip/in) 58.2 60.2 62.1 63.9 65.7 67.5 69.2 70.9 72.6Strength (kips/ft) 3.708 3.708 3.707 3.707 3.707 3.707 3.706 3.706 3.706Stiffness, G' (kip/in) 60.3 62.4 64.5 66.4 68.4 70.3 72.2 74.0 75.8Strength (kips/ft) 1.602 1.596 1.590 1.585 1.580 1.575 1.571 1.567 1.563Stiffness, G' (kip/in) 93.1 93.6 94.0 94.3 94.7 95.0 95.3 95.6 95.8Strength (kips/ft) 2.306 2.298 2.290 2.283 2.276 2.270 2.264 2.259 2.254Stiffness, G' (kip/in) 118.7 119.4 120.1 120.7 121.2 121.7 122.2 122.6 123.1Strength (kips/ft) 2.924 2.916 2.909 2.902 2.896 2.890 2.885 2.880 2.875Stiffness, G' (kip/in) 137.6 138.5 139.4 140.2 140.9 141.6 142.2 142.8 143.4Strength (kips/ft) 3.999 3.992 3.987 3.981 3.976 3.971 3.967 3.963 3.959Stiffness, G' (kip/in) 163.5 164.8 166.0 167.1 168.2 169.1 170.0 170.9 171.7Strength (kips/ft) 4.857 4.852 4.847 4.843 4.839 4.836 4.832 4.829 4.826Stiffness, G' (kip/in) 180.5 182.1 183.5 184.9 186.1 187.3 188.4 189.5 190.5Strength (kips/ft) 6.034 6.031 6.029 6.026 6.024 6.022 6.020 6.018 6.016Stiffness, G' (kip/in) 201.4 203.3 205.1 206.8 208.4 209.9 211.3 212.6 213.9Strength (kips/ft) 2.098 2.070 2.044 2.021 1.999 1.979 1.960 1.942 1.926Stiffness, G' (kip/in) 103.2 103.3 103.4 103.5 103.5 103.6 103.7 103.7 103.8Strength (kips/ft) 2.821 2.793 2.766 2.742 2.719 2.698 2.679 2.661 2.644Stiffness, G' (kip/in) 126.1 126.5 126.9 127.3 127.7 128.0 128.3 128.6 128.9Strength (kips/ft) 3.477 3.450 3.424 3.401 3.380 3.360 3.341 3.324 3.307Stiffness, G' (kip/in) 143.2 143.9 144.6 145.2 145.8 146.4 146.9 147.4 147.9Strength (kips/ft) 4.693 4.669 4.646 4.625 4.606 4.588 4.571 4.556 4.541Stiffness, G' (kip/in) 167.0 168.2 169.3 170.4 171.3 172.2 173.0 173.8 174.6Strength (kips/ft) 5.767 5.745 5.725 5.707 5.690 5.675 5.660 5.646 5.634Stiffness, G' (kip/in) 182.9 184.4 185.8 187.1 188.3 189.5 190.5 191.5 192.5Strength (kips/ft) 7.481 7.465 7.451 7.438 7.426 7.414 7.404 7.394 7.385Stiffness, G' (kip/in) 202.7 204.6 206.4 208.1 209.6 211.1 212.5 213.8 215.0

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.6 9.69 8.90 8.20 7.58 7.03 6.54 6.09 5.69

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

38

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.288 0.273 0.259 0.248 0.237 0.227 0.218 0.210 0.203Stiffness, G' (kip/in) 7.12 7.32 7.50 7.66 7.79 7.91 8.02 8.11 8.18Strength (kips/ft) 0.304 0.289 0.276 0.264 0.253 0.244 0.235 0.227 0.220Stiffness, G' (kip/in) 7.24 7.46 7.66 7.84 8.01 8.15 8.28 8.40 8.50Strength (kips/ft) 0.321 0.306 0.293 0.281 0.270 0.260 0.252 0.244 0.236Stiffness, G' (kip/in) 7.35 7.59 7.81 8.02 8.20 8.37 8.52 8.66 8.78Strength (kips/ft) 0.354 0.339 0.326 0.314 0.303 0.294 0.285 0.277 0.270Stiffness, G' (kip/in) 7.55 7.82 8.07 8.31 8.53 8.74 8.93 9.11 9.27Strength (kips/ft) 0.388 0.373 0.359 0.348 0.337 0.327 0.318 0.310 0.303Stiffness, G' (kip/in) 7.71 8.01 8.29 8.56 8.81 9.05 9.27 9.48 9.68Strength (kips/ft) 0.454 0.439 0.426 0.414 0.403 0.394 0.385 0.377 0.370Stiffness, G' (kip/in) 7.97 8.31 8.64 8.95 9.24 9.53 9.80 10.06 10.3Strength (kips/ft) 0.366 0.347 0.329 0.314 0.300 0.287 0.275 0.265 0.255Stiffness, G' (kip/in) 25.7 25.1 24.5 24.0 23.4 22.9 22.3 21.8 21.3Strength (kips/ft) 0.383 0.363 0.346 0.330 0.316 0.304 0.292 0.282 0.272Stiffness, G' (kip/in) 26.5 25.9 25.4 24.9 24.4 23.9 23.4 22.9 22.4Strength (kips/ft) 0.399 0.380 0.363 0.347 0.333 0.320 0.309 0.298 0.289Stiffness, G' (kip/in) 27.2 26.7 26.3 25.8 25.3 24.8 24.4 23.9 23.5Strength (kips/ft) 0.433 0.413 0.396 0.380 0.366 0.354 0.342 0.332 0.322Stiffness, G' (kip/in) 28.7 28.3 27.9 27.5 27.1 26.7 26.3 25.9 25.5Strength (kips/ft) 0.466 0.447 0.429 0.414 0.400 0.387 0.375 0.365 0.355Stiffness, G' (kip/in) 30.0 29.7 29.4 29.1 28.7 28.4 28.1 27.8 27.4Strength (kips/ft) 0.53 0.51 0.50 0.48 0.47 0.45 0.44 0.43 0.42Stiffness, G' (kip/in) 32.5 32.3 32.2 32.0 31.8 31.6 31.4 31.2 31.0Strength (kips/ft) 0.680 0.642 0.608 0.578 0.551 0.526 0.504 0.483 0.464Stiffness, G' (kip/in) 34.2 33.7 33.2 32.6 32.1 31.5 31.0 30.4 29.9Strength (kips/ft) 0.697 0.659 0.625 0.595 0.567 0.543 0.520 0.500 0.481Stiffness, G' (kip/in) 34.7 34.3 33.8 33.3 32.8 32.3 31.8 31.2 30.7Strength (kips/ft) 0.713 0.675 0.642 0.611 0.584 0.559 0.537 0.517 0.498Stiffness, G' (kip/in) 35.2 34.8 34.4 33.9 33.5 33.0 32.5 32.0 31.5Strength (kips/ft) 0.747 0.709 0.675 0.645 0.617 0.593 0.570 0.550 0.531Stiffness, G' (kip/in) 36.2 35.9 35.5 35.2 34.8 34.4 34.0 33.5 33.1Strength (kips/ft) 0.780 0.742 0.708 0.678 0.651 0.626 0.604 0.583 0.564Stiffness, G' (kip/in) 37.1 36.9 36.6 36.3 36.0 35.7 35.3 35.0 34.6Strength (kips/ft) 0.847 0.809 0.775 0.745 0.717 0.693 0.670 0.650 0.631Stiffness, G' (kip/in) 38.8 38.7 38.6 38.5 38.3 38.1 37.9 37.6 37.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 127.12 6.30 5.62 5.05 4.56 4.13 3.76 3.44 3.16

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

39

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.342 0.326 0.311 0.298 0.286 0.275 0.265 0.255 0.247Stiffness, G' (kip/in) 10.33 10.46 10.57 10.7 10.7 10.8 10.8 10.8 10.8Strength (kips/ft) 0.358 0.342 0.328 0.314 0.302 0.291 0.281 0.272 0.264Stiffness, G' (kip/in) 10.62 10.8 10.9 11.0 11.1 11.2 11.3 11.3 11.4Strength (kips/ft) 0.375 0.359 0.344 0.331 0.319 0.308 0.298 0.289 0.280Stiffness, G' (kip/in) 10.9 11.1 11.3 11.4 11.5 11.7 11.7 11.8 11.9Strength (kips/ft) 0.408 0.392 0.378 0.364 0.352 0.341 0.331 0.322 0.314Stiffness, G' (kip/in) 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.7 12.8Strength (kips/ft) 0.442 0.426 0.411 0.398 0.386 0.375 0.365 0.355 0.347Stiffness, G' (kip/in) 11.7 12.0 12.3 12.6 12.8 13.0 13.2 13.4 13.6Strength (kips/ft) 0.508 0.492 0.478 0.464 0.452 0.441 0.431 0.422 0.414Stiffness, G' (kip/in) 12.4 12.8 13.1 13.5 13.8 14.1 14.4 14.6 14.9Strength (kips/ft) 0.436 0.415 0.396 0.378 0.363 0.348 0.335 0.323 0.312Stiffness, G' (kip/in) 28.8 28.0 27.3 26.5 25.8 25.2 24.5 23.9 23.4Strength (kips/ft) 0.452 0.431 0.412 0.395 0.379 0.365 0.352 0.340 0.329Stiffness, G' (kip/in) 30.0 29.2 28.5 27.8 27.1 26.5 25.9 25.3 24.7Strength (kips/ft) 0.469 0.448 0.429 0.412 0.396 0.382 0.369 0.356 0.345Stiffness, G' (kip/in) 31.0 30.3 29.6 29.0 28.3 27.7 27.2 26.6 26.1Strength (kips/ft) 0.502 0.481 0.462 0.445 0.429 0.415 0.402 0.390 0.379Stiffness, G' (kip/in) 33.1 32.5 31.9 31.3 30.7 30.2 29.6 29.2 28.7Strength (kips/ft) 0.536 0.515 0.496 0.478 0.463 0.448 0.435 0.423 0.412Stiffness, G' (kip/in) 35.1 34.5 34.0 33.5 33.0 32.5 32.0 31.6 31.1Strength (kips/ft) 0.602 0.581 0.562 0.545 0.529 0.515 0.502 0.490 0.479Stiffness, G' (kip/in) 38.7 38.3 37.9 37.5 37.1 36.8 36.4 36.1 35.7Strength (kips/ft) 0.812 0.771 0.734 0.701 0.670 0.643 0.617 0.594 0.572Stiffness, G' (kip/in) 40.0 39.2 38.3 37.4 36.6 35.8 35.0 34.3 33.5Strength (kips/ft) 0.828 0.788 0.751 0.717 0.687 0.659 0.634 0.611 0.589Stiffness, G' (kip/in) 40.9 40.0 39.2 38.4 37.6 36.8 36.1 35.4 34.7Strength (kips/ft) 0.845 0.804 0.767 0.734 0.704 0.676 0.651 0.627 0.606Stiffness, G' (kip/in) 41.7 40.9 40.1 39.3 38.6 37.8 37.1 36.4 35.8Strength (kips/ft) 0.878 0.838 0.801 0.767 0.737 0.709 0.684 0.661 0.639Stiffness, G' (kip/in) 43.2 42.5 41.8 41.1 40.4 39.8 39.1 38.5 37.9Strength (kips/ft) 0.912 0.871 0.834 0.801 0.770 0.743 0.717 0.694 0.672Stiffness, G' (kip/in) 44.7 44.1 43.5 42.8 42.2 41.6 41.0 40.5 39.9Strength (kips/ft) 0.978 0.938 0.901 0.867 0.837 0.809 0.784 0.761 0.739Stiffness, G' (kip/in) 47.4 47.0 46.5 46.0 45.6 45.1 44.6 44.2 43.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.39 6.64 5.99 5.43 4.95 4.53 4.16 3.83 3.54

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

40

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.400 0.382 0.367 0.352 0.339 0.327 0.315 0.305 0.295Stiffness, G' (kip/in) 16.0 15.9 15.8 15.7 15.6 15.5 15.3 15.2 15.0Strength (kips/ft) 0.417 0.399 0.383 0.369 0.356 0.343 0.332 0.322 0.312Stiffness, G' (kip/in) 16.7 16.7 16.6 16.6 16.5 16.4 16.4 16.3 16.2Strength (kips/ft) 0.433 0.416 0.400 0.385 0.372 0.360 0.349 0.338 0.329Stiffness, G' (kip/in) 17.4 17.4 17.4 17.4 17.4 17.4 17.3 17.2 17.2Strength (kips/ft) 0.467 0.449 0.433 0.419 0.406 0.393 0.382 0.372 0.362Stiffness, G' (kip/in) 18.6 18.7 18.8 18.9 19.0 19.0 19.0 19.1 19.1Strength (kips/ft) 0.500 0.482 0.467 0.452 0.439 0.427 0.415 0.405 0.395Stiffness, G' (kip/in) 19.6 19.9 20.0 20.2 20.3 20.5 20.6 20.6 20.7Strength (kips/ft) 0.567 0.549 0.533 0.519 0.506 0.493 0.482 0.472 0.462Stiffness, G' (kip/in) 21.4 21.8 22.1 22.4 22.7 22.9 23.1 23.3 23.5Strength (kips/ft) 0.511 0.488 0.467 0.448 0.431 0.415 0.401 0.387 0.374Stiffness, G' (kip/in) 33.7 32.7 31.7 30.8 29.9 29.1 28.3 27.6 26.9Strength (kips/ft) 0.527 0.505 0.484 0.465 0.448 0.432 0.417 0.404 0.391Stiffness, G' (kip/in) 35.3 34.3 33.3 32.4 31.6 30.8 30.1 29.4 28.7Strength (kips/ft) 0.544 0.521 0.501 0.482 0.464 0.449 0.434 0.420 0.408Stiffness, G' (kip/in) 36.9 35.9 35.0 34.1 33.3 32.5 31.8 31.1 30.5Strength (kips/ft) 0.577 0.555 0.534 0.515 0.498 0.482 0.467 0.454 0.441Stiffness, G' (kip/in) 39.9 39.0 38.1 37.3 36.5 35.8 35.2 34.5 33.9Strength (kips/ft) 0.611 0.588 0.567 0.548 0.531 0.515 0.501 0.487 0.474Stiffness, G' (kip/in) 42.8 41.9 41.1 40.4 39.7 39.0 38.4 37.8 37.2Strength (kips/ft) 0.677 0.655 0.634 0.615 0.598 0.582 0.567 0.554 0.541Stiffness, G' (kip/in) 48.2 47.5 46.8 46.2 45.6 45.0 44.5 44.0 43.5Strength (kips/ft) 0.954 0.910 0.870 0.834 0.800 0.770 0.741 0.715 0.691Stiffness, G' (kip/in) 48.8 47.4 46.1 44.9 43.7 42.6 41.5 40.5 39.5Strength (kips/ft) 0.970 0.927 0.887 0.850 0.817 0.786 0.758 0.732 0.707Stiffness, G' (kip/in) 50.1 48.8 47.5 46.3 45.2 44.1 43.0 42.0 41.1Strength (kips/ft) 0.987 0.943 0.903 0.867 0.834 0.803 0.775 0.748 0.724Stiffness, G' (kip/in) 51.4 50.1 48.8 47.7 46.6 45.5 44.5 43.6 42.6Strength (kips/ft) 1.020 0.977 0.937 0.900 0.867 0.836 0.808 0.782 0.757Stiffness, G' (kip/in) 53.8 52.6 51.5 50.4 49.3 48.3 47.4 46.5 45.6Strength (kips/ft) 1.054 1.010 0.970 0.934 0.900 0.870 0.841 0.815 0.791Stiffness, G' (kip/in) 56.2 55.0 54.0 53.0 52.0 51.0 50.2 49.3 48.5Strength (kips/ft) 1.120 1.077 1.037 1.000 0.967 0.936 0.908 0.882 0.857Stiffness, G' (kip/in) 60.6 59.7 58.7 57.8 57.0 56.2 55.4 54.6 53.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 149.18 8.33 7.59 6.94 6.37 5.87 5.43 5.04 4.68

Span (ft)

24/7

36

24

12

9

6

18

24/5

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

24/3

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

41

Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.445 0.427 0.411 0.396 0.382 0.369 0.357 0.346 0.335Stiffness, G' (kip/in) 20.4 20.1 19.8 19.5 19.3 19.0 18.7 18.4 18.2Strength (kips/ft) 0.462 0.444 0.428 0.412 0.399 0.386 0.374 0.362 0.352Stiffness, G' (kip/in) 21.6 21.4 21.2 20.9 20.7 20.5 20.2 20.0 19.8Strength (kips/ft) 0.479 0.461 0.444 0.429 0.415 0.402 0.390 0.379 0.369Stiffness, G' (kip/in) 22.8 22.6 22.5 22.3 22.1 21.9 21.7 21.5 21.3Strength (kips/ft) 0.512 0.494 0.478 0.462 0.449 0.436 0.424 0.412 0.402Stiffness, G' (kip/in) 25.0 24.9 24.8 24.7 24.6 24.5 24.4 24.3 24.2Strength (kips/ft) 0.545 0.527 0.511 0.496 0.482 0.469 0.457 0.446 0.435Stiffness, G' (kip/in) 26.9 27.0 27.0 27.0 27.0 26.9 26.9 26.8 26.8Strength (kips/ft) 0.612 0.594 0.578 0.562 0.549 0.536 0.524 0.512 0.502Stiffness, G' (kip/in) 30.3 30.5 30.7 30.9 31.0 31.1 31.2 31.3 31.4Strength (kips/ft) 0.569 0.546 0.524 0.505 0.487 0.470 0.454 0.440 0.426Stiffness, G' (kip/in) 36.6 35.5 34.4 33.4 32.5 31.6 30.8 30.0 29.3Strength (kips/ft) 0.586 0.562 0.541 0.521 0.503 0.487 0.471 0.456 0.443Stiffness, G' (kip/in) 38.6 37.5 36.5 35.5 34.6 33.8 32.9 32.2 31.5Strength (kips/ft) 0.602 0.579 0.558 0.538 0.520 0.503 0.488 0.473 0.460Stiffness, G' (kip/in) 40.6 39.5 38.5 37.5 36.7 35.8 35.0 34.3 33.6Strength (kips/ft) 0.636 0.612 0.591 0.571 0.553 0.537 0.521 0.506 0.493Stiffness, G' (kip/in) 44.4 43.4 42.4 41.5 40.7 39.9 39.1 38.4 37.8Strength (kips/ft) 0.669 0.646 0.624 0.605 0.587 0.570 0.554 0.540 0.526Stiffness, G' (kip/in) 48.1 47.1 46.2 45.3 44.5 43.8 43.1 42.4 41.8Strength (kips/ft) 0.736 0.712 0.691 0.671 0.653 0.637 0.621 0.606 0.593Stiffness, G' (kip/in) 55.1 54.2 53.4 52.6 51.9 51.2 50.6 50.0 49.4Strength (kips/ft) 1.064 1.020 0.978 0.941 0.906 0.873 0.843 0.815 0.789Stiffness, G' (kip/in) 54.2 52.6 51.1 49.7 48.3 47.1 45.9 44.7 43.7Strength (kips/ft) 1.081 1.036 0.995 0.957 0.922 0.890 0.860 0.832 0.806Stiffness, G' (kip/in) 55.9 54.4 52.9 51.5 50.2 48.9 47.7 46.6 45.6Strength (kips/ft) 1.098 1.053 1.012 0.974 0.939 0.907 0.877 0.849 0.823Stiffness, G' (kip/in) 57.6 56.1 54.6 53.3 52.0 50.8 49.6 48.5 47.5Strength (kips/ft) 1.131 1.086 1.045 1.007 0.972 0.940 0.910 0.882 0.856Stiffness, G' (kip/in) 60.8 59.4 58.0 56.7 55.5 54.3 53.2 52.2 51.2Strength (kips/ft) 1.164 1.120 1.078 1.041 1.006 0.973 0.943 0.915 0.889Stiffness, G' (kip/in) 64.0 62.6 61.3 60.0 58.9 57.8 56.7 55.7 54.8Strength (kips/ft) 1.231 1.186 1.145 1.107 1.072 1.040 1.010 0.982 0.956Stiffness, G' (kip/in) 70.0 68.8 67.6 66.4 65.4 64.4 63.4 62.5 61.6

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.6 9.69 8.90 8.20 7.58 7.03 6.54 6.09 5.69

Span (ft)

24/7

36

24

18

12

9

6

24/5

36

24

18

12

9

6

24/3

36

24

18

12

9

6

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

42

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.356 0.343 0.332 0.322 0.313 0.305 0.297 0.291 0.284Stiffness, G' (kip/in) 8.04 8.41 8.77 9.13 9.47 9.80 10.12 10.43 10.73Strength (kips/ft) 0.427 0.414 0.403 0.393 0.384 0.376 0.368 0.362 0.355Stiffness, G' (kip/in) 8.42 8.85 9.26 9.66 10.05 10.44 10.82 11.18 11.54Strength (kips/ft) 0.498 0.485 0.474 0.464 0.455 0.447 0.439 0.433 0.426Stiffness, G' (kip/in) 8.66 9.11 9.55 9.99 10.41 10.83 11.24 11.64 12.03Strength (kips/ft) 0.640 0.627 0.616 0.606 0.597 0.589 0.581 0.575 0.568Stiffness, G' (kip/in) 8.93 9.41 9.89 10.36 10.82 11.28 11.72 12.17 12.60Strength (kips/ft) 0.758 0.747 0.736 0.727 0.718 0.710 0.703 0.696 0.690Stiffness, G' (kip/in) 9.08 9.58 10.08 10.57 11.05 11.53 12.00 12.46 12.92Strength (kips/ft) 0.958 0.948 0.939 0.931 0.924 0.917 0.911 0.906 0.901Stiffness, G' (kip/in) 9.24 9.76 10.28 10.79 11.30 11.80 12.29 12.78 13.3Strength (kips/ft) 0.434 0.417 0.402 0.388 0.376 0.365 0.354 0.345 0.337Stiffness, G' (kip/in) 33.2 33.3 33.4 33.5 33.6 33.6 33.7 33.7 33.7Strength (kips/ft) 0.505 0.488 0.473 0.459 0.447 0.435 0.425 0.416 0.408Stiffness, G' (kip/in) 38.0 38.5 38.8 39.2 39.5 39.7 40.0 40.2 40.4Strength (kips/ft) 0.576 0.559 0.544 0.530 0.518 0.506 0.496 0.487 0.479Stiffness, G' (kip/in) 41.8 42.5 43.0 43.6 44.0 44.5 44.9 45.3 45.6Strength (kips/ft) 0.718 0.701 0.686 0.672 0.660 0.648 0.638 0.629 0.621Stiffness, G' (kip/in) 47.3 48.3 49.2 50.0 50.8 51.5 52.2 52.8 53.3Strength (kips/ft) 0.860 0.843 0.828 0.814 0.802 0.790 0.780 0.771 0.763Stiffness, G' (kip/in) 51.1 52.3 53.5 54.5 55.5 56.4 57.2 58.0 58.8Strength (kips/ft) 1.14 1.12 1.10 1.09 1.08 1.06 1.05 1.05 1.04Stiffness, G' (kip/in) 56.0 57.6 59.0 60.3 61.6 62.8 63.9 65.0 66.0Strength (kips/ft) 0.748 0.712 0.681 0.652 0.627 0.604 0.583 0.564 0.546Stiffness, G' (kip/in) 39.3 39.5 39.6 39.6 39.7 39.7 39.7 39.6 39.6Strength (kips/ft) 0.819 0.783 0.752 0.723 0.698 0.675 0.654 0.635 0.617Stiffness, G' (kip/in) 42.8 43.3 43.6 44.0 44.2 44.5 44.7 44.8 45.0Strength (kips/ft) 0.890 0.854 0.823 0.794 0.769 0.746 0.725 0.706 0.688Stiffness, G' (kip/in) 45.7 46.3 46.9 47.4 47.9 48.3 48.7 49.0 49.3Strength (kips/ft) 1.032 0.996 0.965 0.936 0.911 0.888 0.867 0.847 0.830Stiffness, G' (kip/in) 49.9 50.9 51.8 52.7 53.4 54.1 54.8 55.4 55.9Strength (kips/ft) 1.174 1.138 1.107 1.078 1.053 1.030 1.009 0.989 0.972Stiffness, G' (kip/in) 53.0 54.2 55.4 56.4 57.4 58.3 59.2 60.0 60.7Strength (kips/ft) 1.454 1.420 1.388 1.361 1.335 1.313 1.292 1.273 1.255Stiffness, G' (kip/in) 57.2 58.7 60.1 61.5 62.7 63.9 65.1 66.1 67.1

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 127.12 6.30 5.62 5.05 4.56 4.13 3.76 3.44 3.16

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

24/3

36

24

18

12

9

6

24/5

36

24

18

12

9

6

Span (ft)

24/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

43

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.444 0.431 0.418 0.407 0.397 0.388 0.380 0.372 0.365Stiffness, G' (kip/in) 12.64 13.09 13.53 13.9 14.3 14.7 15.1 15.5 15.8Strength (kips/ft) 0.538 0.524 0.512 0.501 0.491 0.482 0.473 0.465 0.458Stiffness, G' (kip/in) 13.58 14.1 14.6 15.2 15.6 16.1 16.6 17.0 17.5Strength (kips/ft) 0.631 0.617 0.605 0.594 0.584 0.575 0.567 0.559 0.552Stiffness, G' (kip/in) 14.2 14.8 15.3 15.9 16.5 17.0 17.5 18.0 18.6Strength (kips/ft) 0.818 0.804 0.792 0.781 0.771 0.762 0.753 0.746 0.739Stiffness, G' (kip/in) 14.8 15.5 16.2 16.8 17.4 18.0 18.7 19.2 19.8Strength (kips/ft) 0.979 0.966 0.954 0.943 0.933 0.924 0.916 0.909 0.901Stiffness, G' (kip/in) 15.2 15.9 16.6 17.3 18.0 18.6 19.3 19.9 20.6Strength (kips/ft) 1.249 1.238 1.228 1.219 1.211 1.203 1.196 1.190 1.184Stiffness, G' (kip/in) 15.7 16.4 17.2 17.9 18.6 19.3 20.0 20.7 21.4Strength (kips/ft) 0.538 0.520 0.503 0.488 0.474 0.462 0.450 0.440 0.430Stiffness, G' (kip/in) 40.4 40.3 40.2 40.2 40.1 40.0 39.9 39.8 39.7Strength (kips/ft) 0.632 0.613 0.596 0.581 0.568 0.555 0.544 0.533 0.523Stiffness, G' (kip/in) 47.7 47.9 48.1 48.2 48.3 48.4 48.5 48.6 48.7Strength (kips/ft) 0.725 0.706 0.690 0.675 0.661 0.649 0.637 0.627 0.617Stiffness, G' (kip/in) 53.6 54.0 54.4 54.7 55.0 55.3 55.5 55.8 56.0Strength (kips/ft) 0.912 0.893 0.877 0.862 0.848 0.835 0.824 0.813 0.804Stiffness, G' (kip/in) 62.4 63.2 63.9 64.6 65.2 65.7 66.2 66.7 67.2Strength (kips/ft) 1.099 1.080 1.063 1.048 1.035 1.022 1.011 1.000 0.990Stiffness, G' (kip/in) 68.8 69.8 70.8 71.7 72.5 73.3 74.0 74.7 75.3Strength (kips/ft) 1.464 1.445 1.428 1.412 1.398 1.385 1.373 1.362 1.352Stiffness, G' (kip/in) 77.3 78.7 80.0 81.3 82.4 83.5 84.6 85.5 86.4Strength (kips/ft) 0.914 0.876 0.841 0.810 0.782 0.756 0.732 0.710 0.690Stiffness, G' (kip/in) 48.7 48.5 48.4 48.2 47.9 47.7 47.5 47.3 47.1Strength (kips/ft) 1.008 0.969 0.935 0.904 0.875 0.849 0.826 0.804 0.784Stiffness, G' (kip/in) 54.4 54.5 54.6 54.7 54.7 54.7 54.7 54.7 54.7Strength (kips/ft) 1.101 1.063 1.028 0.997 0.969 0.943 0.919 0.897 0.877Stiffness, G' (kip/in) 59.1 59.4 59.8 60.0 60.3 60.5 60.6 60.8 60.9Strength (kips/ft) 1.288 1.249 1.215 1.184 1.155 1.130 1.106 1.084 1.064Stiffness, G' (kip/in) 66.3 67.1 67.7 68.4 68.9 69.4 69.9 70.3 70.7Strength (kips/ft) 1.474 1.436 1.402 1.371 1.342 1.316 1.293 1.271 1.251Stiffness, G' (kip/in) 71.7 72.7 73.7 74.5 75.3 76.1 76.8 77.4 78.0Strength (kips/ft) 1.848 1.810 1.775 1.744 1.716 1.690 1.666 1.644 1.624Stiffness, G' (kip/in) 79.1 80.5 81.8 83.1 84.2 85.3 86.3 87.2 88.1

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.39 6.64 5.99 5.43 4.95 4.53 4.16 3.83 3.54

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

24/3

36

24

18

12

9

6

24/5

36

24

18

12

9

6

Span (ft)

24/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

44

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.577 0.564 0.551 0.540 0.529 0.519 0.510 0.502 0.494Stiffness, G' (kip/in) 22.4 22.9 23.4 23.9 24.3 24.7 25.1 25.5 25.9Strength (kips/ft) 0.721 0.707 0.695 0.683 0.673 0.663 0.654 0.646 0.638Stiffness, G' (kip/in) 25.1 25.8 26.5 27.2 27.8 28.4 29.0 29.5 30.1Strength (kips/ft) 0.864 0.851 0.838 0.827 0.816 0.806 0.797 0.789 0.781Stiffness, G' (kip/in) 27.0 27.8 28.6 29.4 30.1 30.9 31.6 32.2 32.9Strength (kips/ft) 1.144 1.129 1.117 1.105 1.094 1.084 1.075 1.066 1.058Stiffness, G' (kip/in) 29.2 30.2 31.2 32.2 33.1 34.0 34.9 35.7 36.5Strength (kips/ft) 1.371 1.358 1.346 1.335 1.325 1.316 1.308 1.300 1.292Stiffness, G' (kip/in) 30.6 31.7 32.8 33.8 34.9 35.9 36.9 37.8 38.8Strength (kips/ft) 1.762 1.752 1.742 1.734 1.726 1.718 1.711 1.705 1.699Stiffness, G' (kip/in) 32.1 33.4 34.6 35.8 36.9 38.1 39.2 40.3 41.3Strength (kips/ft) 0.688 0.669 0.652 0.636 0.621 0.608 0.596 0.584 0.574Stiffness, G' (kip/in) 51.6 51.3 51.0 50.7 50.4 50.1 49.9 49.7 49.5Strength (kips/ft) 0.832 0.813 0.795 0.779 0.765 0.751 0.739 0.728 0.717Stiffness, G' (kip/in) 62.9 62.8 62.7 62.7 62.6 62.5 62.4 62.3 62.2Strength (kips/ft) 0.975 0.956 0.939 0.923 0.908 0.895 0.883 0.871 0.861Stiffness, G' (kip/in) 72.5 72.6 72.7 72.8 72.8 72.9 73.0 73.0 73.0Strength (kips/ft) 1.262 1.243 1.226 1.210 1.195 1.182 1.170 1.158 1.148Stiffness, G' (kip/in) 87.6 88.0 88.5 88.8 89.2 89.5 89.8 90.1 90.4Strength (kips/ft) 1.549 1.530 1.513 1.497 1.482 1.469 1.457 1.445 1.435Stiffness, G' (kip/in) 99.0 99.7 100.4 101.1 101.7 102.2 102.7 103.2 103.6Strength (kips/ft) 2.080 2.061 2.043 2.027 2.013 1.999 1.987 1.975 1.964Stiffness, G' (kip/in) 115.1 116.3 117.4 118.4 119.4 120.3 121.1 121.9 122.6Strength (kips/ft) 1.131 1.091 1.055 1.021 0.991 0.962 0.936 0.912 0.890Stiffness, G' (kip/in) 63.4 62.8 62.2 61.6 61.1 60.6 60.1 59.6 59.2Strength (kips/ft) 1.275 1.235 1.198 1.165 1.134 1.106 1.080 1.056 1.034Stiffness, G' (kip/in) 72.8 72.5 72.2 71.9 71.6 71.3 71.0 70.7 70.4Strength (kips/ft) 1.418 1.378 1.342 1.308 1.278 1.249 1.223 1.199 1.177Stiffness, G' (kip/in) 80.9 80.8 80.7 80.6 80.5 80.4 80.3 80.2 80.1Strength (kips/ft) 1.705 1.665 1.629 1.595 1.565 1.536 1.510 1.486 1.464Stiffness, G' (kip/in) 93.9 94.2 94.5 94.8 95.0 95.2 95.4 95.5 95.7Strength (kips/ft) 1.992 1.952 1.916 1.882 1.852 1.823 1.797 1.773 1.751Stiffness, G' (kip/in) 103.9 104.6 105.2 105.7 106.2 106.6 107.1 107.4 107.8Strength (kips/ft) 2.545 2.506 2.470 2.438 2.407 2.380 2.354 2.330 2.308Stiffness, G' (kip/in) 118.4 119.5 120.5 121.5 122.4 123.2 124.0 124.7 125.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 149.18 8.33 7.59 6.94 6.37 5.87 5.43 5.04 4.68

24/3

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

24/5

36

24

12

9

6

18

Span (ft)

24/7

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

45

Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.713 0.700 0.687 0.676 0.665 0.655 0.646 0.638 0.630Stiffness, G' (kip/in) 32.5 33.0 33.5 33.9 34.3 34.6 35.0 35.3 35.6Strength (kips/ft) 0.914 0.900 0.888 0.876 0.866 0.856 0.847 0.839 0.831Stiffness, G' (kip/in) 38.1 38.9 39.6 40.2 40.9 41.5 42.0 42.6 43.1Strength (kips/ft) 1.115 1.101 1.089 1.077 1.067 1.057 1.048 1.039 1.032Stiffness, G' (kip/in) 42.1 43.0 43.9 44.8 45.6 46.4 47.1 47.9 48.6Strength (kips/ft) 1.482 1.469 1.456 1.444 1.434 1.424 1.415 1.406 1.398Stiffness, G' (kip/in) 47.3 48.5 49.7 50.8 51.9 53.0 54.0 55.0 55.9Strength (kips/ft) 1.791 1.778 1.767 1.757 1.747 1.738 1.730 1.722 1.715Stiffness, G' (kip/in) 50.5 52.0 53.3 54.7 56.0 57.2 58.4 59.6 60.7Strength (kips/ft) 2.307 2.298 2.289 2.281 2.273 2.266 2.260 2.254 2.248Stiffness, G' (kip/in) 54.4 56.1 57.7 59.3 60.8 62.3 63.8 65.2 66.6Strength (kips/ft) 0.837 0.818 0.801 0.785 0.770 0.756 0.744 0.732 0.721Stiffness, G' (kip/in) 60.2 59.8 59.3 58.9 58.6 58.2 57.9 57.6 57.3Strength (kips/ft) 1.038 1.019 1.001 0.985 0.971 0.957 0.944 0.933 0.922Stiffness, G' (kip/in) 75.1 74.9 74.6 74.4 74.1 73.9 73.7 73.5 73.4Strength (kips/ft) 1.238 1.220 1.202 1.186 1.171 1.158 1.145 1.133 1.122Stiffness, G' (kip/in) 88.0 87.9 87.8 87.7 87.6 87.5 87.5 87.4 87.3Strength (kips/ft) 1.640 1.621 1.604 1.588 1.573 1.559 1.547 1.535 1.524Stiffness, G' (kip/in) 109.0 109.3 109.4 109.6 109.8 109.9 110.0 110.1 110.3Strength (kips/ft) 2.042 2.023 2.005 1.989 1.975 1.961 1.948 1.936 1.924Stiffness, G' (kip/in) 125.5 126.0 126.4 126.8 127.2 127.5 127.8 128.1 128.4Strength (kips/ft) 2.749 2.730 2.713 2.698 2.683 2.670 2.657 2.645 2.635Stiffness, G' (kip/in) 149.8 150.6 151.4 152.2 152.9 153.5 154.2 154.7 155.3Strength (kips/ft) 1.332 1.292 1.255 1.220 1.189 1.160 1.133 1.108 1.084Stiffness, G' (kip/in) 74.4 73.6 72.7 72.0 71.3 70.6 69.9 69.3 68.7Strength (kips/ft) 1.533 1.492 1.455 1.421 1.390 1.361 1.334 1.308 1.285Stiffness, G' (kip/in) 87.4 86.8 86.2 85.6 85.1 84.6 84.1 83.7 83.3Strength (kips/ft) 1.734 1.693 1.656 1.622 1.591 1.561 1.534 1.509 1.486Stiffness, G' (kip/in) 98.7 98.3 97.9 97.5 97.2 96.9 96.5 96.2 95.9Strength (kips/ft) 2.135 2.095 2.058 2.024 1.992 1.963 1.936 1.911 1.887Stiffness, G' (kip/in) 117.3 117.3 117.3 117.3 117.2 117.2 117.1 117.1 117.0Strength (kips/ft) 2.537 2.496 2.459 2.425 2.394 2.365 2.337 2.312 2.289Stiffness, G' (kip/in) 132.2 132.5 132.7 133.0 133.2 133.4 133.6 133.7 133.9Strength (kips/ft) 3.289 3.250 3.214 3.181 3.150 3.122 3.095 3.071 3.048Stiffness, G' (kip/in) 154.3 155.1 155.8 156.4 157.0 157.6 158.1 158.6 159.0

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.6 9.69 8.90 8.20 7.58 7.03 6.54 6.09 5.69

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

24/3

36

24

18

12

9

6

24/5

36

24

18

12

9

6

Span (ft)

24/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

46

Design Thickness 0.0299 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.129 0.123 0.118 0.114 0.110 0.106 0.103 0.100 0.097Stiffness, G' (kip/in) 5.28 5.50 5.70 5.89 6.07 6.24 6.39 6.54 6.67Strength (kips/ft) 0.146 0.140 0.135 0.130 0.126 0.123 0.120 0.116 0.114Stiffness, G' (kip/in) 5.35 5.58 5.79 6.00 6.19 6.37 6.55 6.71 6.86Strength (kips/ft) 0.162 0.157 0.152 0.147 0.143 0.139 0.136 0.133 0.130Stiffness, G' (kip/in) 5.40 5.64 5.87 6.09 6.30 6.49 6.68 6.86 7.03Strength (kips/ft) 0.196 0.190 0.185 0.180 0.176 0.173 0.170 0.166 0.164Stiffness, G' (kip/in) 5.50 5.75 6.00 6.24 6.47 6.69 6.90 7.10 7.30Strength (kips/ft) 0.228 0.222 0.218 0.213 0.209 0.206 0.203 0.200 0.197Stiffness, G' (kip/in) 5.57 5.84 6.10 6.36 6.60 6.84 7.07 7.30 7.51Strength (kips/ft) 0.276 0.271 0.267 0.263 0.260 0.257 0.254 0.251 0.249Stiffness, G' (kip/in) 5.69 5.98 6.26 6.54 6.81 7.07 7.33 7.58 7.8Strength (kips/ft) 0.161 0.153 0.147 0.141 0.135 0.130 0.126 0.122 0.118Stiffness, G' (kip/in) 21.9 21.9 21.8 21.7 21.6 21.4 21.2 21.0 20.8Strength (kips/ft) 0.177 0.170 0.163 0.157 0.152 0.147 0.143 0.139 0.135Stiffness, G' (kip/in) 22.4 22.4 22.5 22.4 22.3 22.2 22.1 22.0 21.8Strength (kips/ft) 0.194 0.187 0.180 0.174 0.169 0.164 0.159 0.155 0.152Stiffness, G' (kip/in) 22.9 23.0 23.1 23.1 23.1 23.0 22.9 22.8 22.7Strength (kips/ft) 0.227 0.220 0.213 0.207 0.202 0.197 0.193 0.189 0.185Stiffness, G' (kip/in) 23.8 24.0 24.2 24.3 24.4 24.4 24.4 24.4 24.4Strength (kips/ft) 0.261 0.253 0.247 0.241 0.235 0.230 0.226 0.222 0.218Stiffness, G' (kip/in) 24.6 24.9 25.2 25.4 25.6 25.7 25.8 25.9 25.9Strength (kips/ft) 0.33 0.32 0.31 0.31 0.30 0.30 0.29 0.29 0.28Stiffness, G' (kip/in) 26.1 26.5 26.9 27.3 27.6 27.9 28.1 28.4 28.5Strength (kips/ft) 0.288 0.273 0.260 0.248 0.237 0.227 0.218 0.210 0.203Stiffness, G' (kip/in) 26.5 26.8 27.0 27.2 27.3 27.3 27.3 27.2 27.1Strength (kips/ft) 0.305 0.290 0.276 0.264 0.254 0.244 0.235 0.227 0.220Stiffness, G' (kip/in) 26.8 27.2 27.4 27.6 27.7 27.8 27.8 27.8 27.7Strength (kips/ft) 0.321 0.306 0.293 0.281 0.270 0.261 0.252 0.244 0.236Stiffness, G' (kip/in) 27.1 27.5 27.8 28.0 28.2 28.3 28.4 28.4 28.4Strength (kips/ft) 0.355 0.340 0.326 0.314 0.304 0.294 0.285 0.277 0.270Stiffness, G' (kip/in) 27.7 28.1 28.5 28.8 29.0 29.2 29.4 29.5 29.5Strength (kips/ft) 0.388 0.373 0.360 0.348 0.337 0.327 0.318 0.310 0.303Stiffness, G' (kip/in) 28.1 28.7 29.1 29.5 29.8 30.1 30.3 30.5 30.6Strength (kips/ft) 0.455 0.440 0.426 0.414 0.404 0.394 0.385 0.377 0.370Stiffness, G' (kip/in) 29.0 29.7 30.2 30.7 31.2 31.6 31.9 32.2 32.5

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 126.86 6.08 5.42 4.86 4.39 3.98 3.63 3.32 3.05

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

47

Design Thickness 0.0359 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.138 0.132 0.127 0.123 0.119 0.115 0.112 0.108 0.105Stiffness, G' (kip/in) 8.24 8.46 8.66 8.84 9.00 9.15 9.28 9.40 9.50Strength (kips/ft) 0.154 0.149 0.144 0.139 0.135 0.132 0.128 0.125 0.122Stiffness, G' (kip/in) 8.41 8.65 8.88 9.09 9.28 9.46 9.62 9.77 9.91Strength (kips/ft) 0.171 0.165 0.160 0.156 0.152 0.148 0.145 0.142 0.139Stiffness, G' (kip/in) 8.56 8.83 9.08 9.31 9.53 9.73 9.92 10.10 10.26Strength (kips/ft) 0.204 0.199 0.194 0.189 0.185 0.182 0.178 0.175 0.172Stiffness, G' (kip/in) 8.81 9.12 9.41 9.68 9.94 10.19 10.42 10.6 10.9Strength (kips/ft) 0.238 0.232 0.227 0.223 0.219 0.215 0.212 0.208 0.205Stiffness, G' (kip/in) 9.02 9.35 9.67 9.98 10.27 10.6 10.8 11.1 11.3Strength (kips/ft) 0.293 0.289 0.284 0.280 0.276 0.273 0.270 0.267 0.264Stiffness, G' (kip/in) 9.33 9.71 10.08 10.43 10.8 11.1 11.4 11.7 12.0Strength (kips/ft) 0.171 0.164 0.158 0.152 0.146 0.141 0.137 0.133 0.129Stiffness, G' (kip/in) 27.4 27.0 26.7 26.3 25.9 25.6 25.2 24.8 24.4Strength (kips/ft) 0.188 0.181 0.174 0.168 0.163 0.158 0.154 0.149 0.146Stiffness, G' (kip/in) 28.3 28.0 27.8 27.4 27.1 26.8 26.5 26.1 25.8Strength (kips/ft) 0.205 0.198 0.191 0.185 0.180 0.175 0.170 0.166 0.162Stiffness, G' (kip/in) 29.2 29.0 28.8 28.5 28.3 28.0 27.7 27.4 27.1Strength (kips/ft) 0.238 0.231 0.224 0.218 0.213 0.208 0.204 0.199 0.196Stiffness, G' (kip/in) 30.9 30.8 30.7 30.5 30.4 30.2 30.0 29.8 29.6Strength (kips/ft) 0.271 0.264 0.258 0.252 0.246 0.241 0.237 0.233 0.229Stiffness, G' (kip/in) 32.4 32.4 32.4 32.4 32.3 32.2 32.1 32.0 31.9Strength (kips/ft) 0.338 0.331 0.324 0.318 0.313 0.308 0.304 0.299 0.296Stiffness, G' (kip/in) 35.0 35.3 35.5 35.6 35.7 35.8 35.9 35.9 35.9Strength (kips/ft) 0.307 0.293 0.280 0.268 0.257 0.248 0.239 0.231 0.223Stiffness, G' (kip/in) 35.2 35.1 34.9 34.7 34.4 34.1 33.8 33.4 33.1Strength (kips/ft) 0.324 0.309 0.296 0.285 0.274 0.264 0.255 0.247 0.240Stiffness, G' (kip/in) 35.8 35.7 35.6 35.4 35.2 35.0 34.7 34.4 34.1Strength (kips/ft) 0.341 0.326 0.313 0.301 0.291 0.281 0.272 0.264 0.256Stiffness, G' (kip/in) 36.4 36.4 36.3 36.2 36.0 35.8 35.6 35.3 35.1Strength (kips/ft) 0.374 0.359 0.346 0.335 0.324 0.314 0.305 0.297 0.290Stiffness, G' (kip/in) 37.4 37.5 37.6 37.6 37.5 37.4 37.3 37.1 36.9Strength (kips/ft) 0.407 0.393 0.380 0.368 0.357 0.348 0.339 0.331 0.323Stiffness, G' (kip/in) 38.4 38.6 38.8 38.9 38.9 38.9 38.8 38.8 38.7Strength (kips/ft) 0.474 0.459 0.446 0.435 0.424 0.414 0.405 0.397 0.390Stiffness, G' (kip/in) 40.2 40.6 40.9 41.2 41.4 41.5 41.6 41.7 41.8

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.10 6.37 5.75 5.21 4.75 4.35 3.99 3.68 3.40

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

48

Design Thickness 0.0478 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.162 0.155 0.150 0.145 0.140 0.136 0.132 0.128 0.125Stiffness, G' (kip/in) 14.3 14.4 14.5 14.6 14.6 14.7 14.7 14.7 14.7Strength (kips/ft) 0.178 0.172 0.167 0.161 0.157 0.153 0.149 0.145 0.142Stiffness, G' (kip/in) 14.8 15.0 15.1 15.3 15.4 15.5 15.5 15.6 15.6Strength (kips/ft) 0.195 0.189 0.183 0.178 0.174 0.169 0.165 0.162 0.158Stiffness, G' (kip/in) 15.3 15.5 15.7 15.9 16.0 16.2 16.3 16.4 16.5Strength (kips/ft) 0.228 0.222 0.217 0.211 0.207 0.203 0.199 0.195 0.192Stiffness, G' (kip/in) 16.1 16.4 16.7 16.9 17.2 17.4 17.6 17.8 18.0Strength (kips/ft) 0.262 0.255 0.250 0.245 0.240 0.236 0.232 0.228 0.225Stiffness, G' (kip/in) 16.8 17.1 17.5 17.8 18.2 18.4 18.7 19.0 19.2Strength (kips/ft) 0.328 0.322 0.317 0.311 0.307 0.303 0.299 0.295 0.292Stiffness, G' (kip/in) 17.8 18.3 18.8 19.2 19.7 20.1 20.5 20.8 21.2Strength (kips/ft) 0.202 0.194 0.187 0.180 0.174 0.168 0.163 0.158 0.154Stiffness, G' (kip/in) 35.5 34.7 33.9 33.2 32.5 31.8 31.1 30.5 29.9Strength (kips/ft) 0.219 0.211 0.204 0.197 0.191 0.185 0.180 0.175 0.171Stiffness, G' (kip/in) 37.1 36.4 35.7 35.0 34.3 33.7 33.1 32.5 31.9Strength (kips/ft) 0.236 0.228 0.220 0.214 0.207 0.202 0.197 0.192 0.187Stiffness, G' (kip/in) 38.7 38.0 37.4 36.8 36.2 35.6 35.0 34.5 33.9Strength (kips/ft) 0.269 0.261 0.254 0.247 0.241 0.235 0.230 0.225 0.221Stiffness, G' (kip/in) 41.7 41.2 40.6 40.1 39.6 39.1 38.6 38.2 37.7Strength (kips/ft) 0.302 0.294 0.287 0.280 0.274 0.268 0.263 0.258 0.254Stiffness, G' (kip/in) 44.5 44.1 43.7 43.2 42.8 42.4 42.0 41.7 41.3Strength (kips/ft) 0.369 0.361 0.354 0.347 0.341 0.335 0.330 0.325 0.321Stiffness, G' (kip/in) 49.6 49.4 49.2 48.9 48.7 48.5 48.3 48.0 47.8Strength (kips/ft) 0.365 0.349 0.335 0.322 0.310 0.299 0.288 0.279 0.270Stiffness, G' (kip/in) 48.6 47.8 47.0 46.2 45.4 44.6 43.8 43.1 42.3Strength (kips/ft) 0.381 0.366 0.351 0.338 0.326 0.315 0.305 0.296 0.287Stiffness, G' (kip/in) 49.8 49.1 48.4 47.6 46.9 46.1 45.4 44.7 44.0Strength (kips/ft) 0.398 0.382 0.368 0.355 0.343 0.332 0.322 0.312 0.303Stiffness, G' (kip/in) 51.0 50.3 49.7 49.0 48.3 47.6 46.9 46.2 45.6Strength (kips/ft) 0.431 0.416 0.401 0.388 0.376 0.365 0.355 0.346 0.337Stiffness, G' (kip/in) 53.2 52.7 52.1 51.6 51.0 50.4 49.8 49.3 48.7Strength (kips/ft) 0.465 0.449 0.435 0.422 0.410 0.399 0.388 0.379 0.370Stiffness, G' (kip/in) 55.3 54.9 54.5 54.0 53.5 53.1 52.6 52.1 51.6Strength (kips/ft) 0.531 0.516 0.501 0.488 0.476 0.465 0.455 0.446 0.437Stiffness, G' (kip/in) 59.2 59.0 58.8 58.5 58.2 57.9 57.6 57.3 57.0

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 148.83 8.01 7.29 6.67 6.13 5.65 5.22 4.84 4.50

Span (ft)

32/7

36

24

12

9

6

18

32/5

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

32/3

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

49

Design Thickness 0.0598 in.Support connection #12 screwsSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.181 0.175 0.169 0.164 0.159 0.154 0.150 0.146 0.142Stiffness, G' (kip/in) 19.9 19.8 19.8 19.7 19.6 19.4 19.3 19.2 19.0Strength (kips/ft) 0.198 0.192 0.186 0.180 0.175 0.171 0.166 0.162 0.159Stiffness, G' (kip/in) 21.0 21.0 21.0 21.0 20.9 20.9 20.8 20.7 20.6Strength (kips/ft) 0.215 0.208 0.202 0.197 0.192 0.187 0.183 0.179 0.175Stiffness, G' (kip/in) 22.0 22.1 22.1 22.2 22.2 22.2 22.2 22.1 22.1Strength (kips/ft) 0.248 0.242 0.236 0.230 0.225 0.221 0.216 0.212 0.209Stiffness, G' (kip/in) 23.7 23.9 24.1 24.3 24.4 24.5 24.6 24.7 24.7Strength (kips/ft) 0.281 0.275 0.269 0.264 0.259 0.254 0.250 0.246 0.242Stiffness, G' (kip/in) 25.2 25.5 25.8 26.1 26.3 26.5 26.7 26.9 27.0Strength (kips/ft) 0.348 0.342 0.336 0.330 0.325 0.321 0.316 0.312 0.309Stiffness, G' (kip/in) 27.7 28.2 28.6 29.0 29.4 29.8 30.2 30.5 30.8Strength (kips/ft) 0.228 0.219 0.211 0.204 0.198 0.192 0.186 0.181 0.176Stiffness, G' (kip/in) 40.6 39.6 38.6 37.6 36.7 35.9 35.1 34.3 33.6Strength (kips/ft) 0.244 0.236 0.228 0.221 0.214 0.208 0.203 0.197 0.193Stiffness, G' (kip/in) 42.9 41.9 40.9 40.1 39.2 38.4 37.6 36.9 36.2Strength (kips/ft) 0.261 0.253 0.245 0.238 0.231 0.225 0.219 0.214 0.209Stiffness, G' (kip/in) 45.1 44.1 43.3 42.4 41.6 40.8 40.1 39.4 38.8Strength (kips/ft) 0.294 0.286 0.278 0.271 0.264 0.258 0.253 0.247 0.243Stiffness, G' (kip/in) 49.3 48.5 47.7 47.0 46.2 45.5 44.9 44.3 43.7Strength (kips/ft) 0.328 0.319 0.311 0.304 0.298 0.292 0.286 0.281 0.276Stiffness, G' (kip/in) 53.3 52.6 51.9 51.3 50.6 50.0 49.4 48.9 48.3Strength (kips/ft) 0.394 0.386 0.378 0.371 0.364 0.358 0.353 0.347 0.343Stiffness, G' (kip/in) 60.8 60.2 59.7 59.2 58.8 58.3 57.8 57.4 57.0Strength (kips/ft) 0.413 0.396 0.381 0.367 0.354 0.342 0.331 0.321 0.311Stiffness, G' (kip/in) 57.9 56.6 55.3 54.1 52.9 51.8 50.7 49.7 48.7Strength (kips/ft) 0.429 0.413 0.398 0.384 0.371 0.359 0.348 0.338 0.328Stiffness, G' (kip/in) 59.7 58.5 57.3 56.1 55.0 53.9 52.9 51.9 50.9Strength (kips/ft) 0.446 0.429 0.414 0.400 0.388 0.376 0.365 0.354 0.345Stiffness, G' (kip/in) 61.5 60.3 59.2 58.1 57.0 56.0 55.0 54.0 53.1Strength (kips/ft) 0.479 0.463 0.448 0.434 0.421 0.409 0.398 0.388 0.378Stiffness, G' (kip/in) 64.9 63.8 62.8 61.8 60.9 59.9 59.0 58.2 57.3Strength (kips/ft) 0.513 0.496 0.481 0.467 0.454 0.442 0.431 0.421 0.411Stiffness, G' (kip/in) 68.1 67.2 66.3 65.4 64.5 63.7 62.9 62.1 61.3Strength (kips/ft) 0.579 0.563 0.548 0.534 0.521 0.509 0.498 0.488 0.478Stiffness, G' (kip/in) 74.2 73.5 72.8 72.1 71.4 70.7 70.1 69.5 68.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.2 9.32 8.56 7.89 7.29 6.76 6.29 5.86 5.48

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

50

Design Thickness 0.0299 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.197 0.194 0.191 0.188 0.186 0.184 0.182 0.180 0.179Stiffness, G' (kip/in) 5.72 6.02 6.32 6.62 6.91 7.19 7.48 7.75 8.02Strength (kips/ft) 0.256 0.253 0.251 0.248 0.246 0.244 0.242 0.240 0.238Stiffness, G' (kip/in) 5.88 6.20 6.53 6.84 7.16 7.47 7.78 8.08 8.38Strength (kips/ft) 0.303 0.301 0.298 0.296 0.294 0.292 0.291 0.289 0.288Stiffness, G' (kip/in) 5.97 6.31 6.64 6.97 7.30 7.63 7.95 8.26 8.58Strength (kips/ft) 0.376 0.375 0.373 0.371 0.370 0.369 0.368 0.367 0.366Stiffness, G' (kip/in) 6.07 6.42 6.77 7.11 7.46 7.80 8.13 8.47 8.80Strength (kips/ft) 0.427 0.426 0.425 0.424 0.423 0.422 0.421 0.420 0.420Stiffness, G' (kip/in) 6.12 6.48 6.84 7.19 7.54 7.89 8.23 8.58 8.92Strength (kips/ft) 0.487 0.486 0.486 0.485 0.485 0.484 0.484 0.483 0.483Stiffness, G' (kip/in) 6.18 6.54 6.91 7.27 7.63 7.98 8.34 8.69 9.0Strength (kips/ft) 0.229 0.224 0.219 0.215 0.211 0.208 0.205 0.202 0.200Stiffness, G' (kip/in) 26.4 27.1 27.7 28.3 28.8 29.2 29.7 30.1 30.5Strength (kips/ft) 0.300 0.294 0.290 0.286 0.282 0.279 0.276 0.273 0.271Stiffness, G' (kip/in) 29.0 29.9 30.7 31.5 32.2 32.9 33.6 34.2 34.8Strength (kips/ft) 0.369 0.364 0.359 0.355 0.351 0.347 0.344 0.341 0.339Stiffness, G' (kip/in) 30.7 31.8 32.8 33.7 34.6 35.5 36.3 37.0 37.8Strength (kips/ft) 0.482 0.477 0.473 0.470 0.466 0.463 0.460 0.458 0.455Stiffness, G' (kip/in) 33.0 34.3 35.5 36.6 37.7 38.8 39.8 40.8 41.7Strength (kips/ft) 0.581 0.577 0.573 0.570 0.567 0.564 0.562 0.560 0.557Stiffness, G' (kip/in) 34.4 35.8 37.2 38.5 39.7 40.9 42.1 43.2 44.2Strength (kips/ft) 0.73 0.73 0.73 0.73 0.72 0.72 0.72 0.72 0.72Stiffness, G' (kip/in) 36.1 37.6 39.2 40.6 42.0 43.4 44.7 46.0 47.2Strength (kips/ft) 0.356 0.343 0.332 0.322 0.313 0.305 0.297 0.291 0.284Stiffness, G' (kip/in) 29.3 30.0 30.7 31.4 32.0 32.5 33.0 33.5 33.9Strength (kips/ft) 0.427 0.414 0.403 0.393 0.384 0.376 0.368 0.362 0.355Stiffness, G' (kip/in) 30.9 31.9 32.8 33.7 34.4 35.2 35.9 36.5 37.2Strength (kips/ft) 0.495 0.483 0.472 0.462 0.454 0.446 0.438 0.432 0.425Stiffness, G' (kip/in) 32.2 33.3 34.3 35.3 36.3 37.1 38.0 38.8 39.5Strength (kips/ft) 0.615 0.604 0.594 0.585 0.577 0.569 0.562 0.556 0.550Stiffness, G' (kip/in) 33.9 35.2 36.4 37.6 38.8 39.8 40.9 41.9 42.8Strength (kips/ft) 0.726 0.715 0.706 0.698 0.690 0.684 0.677 0.672 0.666Stiffness, G' (kip/in) 35.0 36.4 37.8 39.1 40.4 41.6 42.8 43.9 45.0Strength (kips/ft) 0.917 0.909 0.901 0.894 0.888 0.883 0.878 0.873 0.869Stiffness, G' (kip/in) 36.4 38.0 39.5 41.0 42.4 43.8 45.1 46.4 47.6

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 126.86 6.08 5.42 4.86 4.39 3.98 3.63 3.32 3.05

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

51

Design Thickness 0.0359 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.240 0.237 0.235 0.232 0.230 0.228 0.227 0.225 0.224Stiffness, G' (kip/in) 9.46 9.87 10.28 10.7 11.1 11.4 11.8 12.2 12.5Strength (kips/ft) 0.314 0.312 0.309 0.307 0.305 0.303 0.301 0.300 0.298Stiffness, G' (kip/in) 9.88 10.3 10.8 11.2 11.7 12.1 12.5 12.9 13.3Strength (kips/ft) 0.375 0.372 0.370 0.368 0.367 0.365 0.364 0.362 0.361Stiffness, G' (kip/in) 10.1 10.6 11.1 11.6 12.0 12.5 12.9 13.4 13.8Strength (kips/ft) 0.466 0.464 0.463 0.462 0.460 0.459 0.458 0.457 0.457Stiffness, G' (kip/in) 10.4 10.9 11.4 11.9 12.4 12.9 13.4 13.9 14.4Strength (kips/ft) 0.527 0.526 0.525 0.524 0.523 0.522 0.522 0.521 0.521Stiffness, G' (kip/in) 10.5 11.1 11.6 12.1 12.6 13.1 13.6 14.1 14.6Strength (kips/ft) 0.595 0.595 0.595 0.594 0.594 0.593 0.593 0.593 0.593Stiffness, G' (kip/in) 10.7 11.2 11.8 12.3 12.9 13.4 13.9 14.4 15.0Strength (kips/ft) 0.274 0.269 0.265 0.261 0.258 0.255 0.252 0.249 0.247Stiffness, G' (kip/in) 36.2 36.7 37.2 37.6 38.0 38.4 38.7 39.0 39.3Strength (kips/ft) 0.367 0.363 0.358 0.355 0.351 0.348 0.345 0.343 0.340Stiffness, G' (kip/in) 41.0 41.8 42.5 43.2 43.9 44.5 45.1 45.7 46.2Strength (kips/ft) 0.454 0.449 0.445 0.441 0.437 0.434 0.431 0.428 0.426Stiffness, G' (kip/in) 44.4 45.4 46.4 47.3 48.2 49.0 49.8 50.6 51.3Strength (kips/ft) 0.601 0.596 0.593 0.589 0.586 0.583 0.581 0.578 0.576Stiffness, G' (kip/in) 49.0 50.4 51.7 52.9 54.1 55.2 56.3 57.3 58.2Strength (kips/ft) 0.726 0.722 0.719 0.716 0.714 0.711 0.709 0.707 0.705Stiffness, G' (kip/in) 52.0 53.6 55.1 56.5 57.9 59.2 60.5 61.7 62.8Strength (kips/ft) 0.916 0.913 0.911 0.909 0.907 0.906 0.904 0.903 0.902Stiffness, G' (kip/in) 55.6 57.5 59.2 60.9 62.6 64.1 65.6 67.1 68.5Strength (kips/ft) 0.410 0.398 0.387 0.378 0.369 0.361 0.354 0.347 0.341Stiffness, G' (kip/in) 41.1 41.7 42.2 42.7 43.1 43.5 43.8 44.1 44.4Strength (kips/ft) 0.503 0.491 0.481 0.471 0.462 0.454 0.447 0.441 0.434Stiffness, G' (kip/in) 44.5 45.3 46.2 46.9 47.6 48.2 48.8 49.4 49.9Strength (kips/ft) 0.591 0.579 0.569 0.560 0.552 0.544 0.537 0.530 0.524Stiffness, G' (kip/in) 47.0 48.1 49.2 50.1 51.0 51.9 52.7 53.4 54.1Strength (kips/ft) 0.749 0.738 0.729 0.720 0.712 0.705 0.699 0.693 0.687Stiffness, G' (kip/in) 50.7 52.1 53.4 54.7 55.9 57.0 58.1 59.1 60.1Strength (kips/ft) 0.893 0.883 0.875 0.867 0.860 0.853 0.847 0.842 0.837Stiffness, G' (kip/in) 53.2 54.8 56.3 57.7 59.1 60.5 61.7 62.9 64.1Strength (kips/ft) 1.137 1.130 1.123 1.117 1.111 1.106 1.101 1.097 1.093Stiffness, G' (kip/in) 56.3 58.1 59.9 61.6 63.3 64.8 66.3 67.8 69.2

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.10 6.37 5.75 5.21 4.75 4.35 3.99 3.68 3.40

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

52

Design Thickness 0.0478 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.338 0.335 0.332 0.330 0.327 0.325 0.323 0.322 0.320Stiffness, G' (kip/in) 18.4 19.0 19.6 20.1 20.7 21.2 21.7 22.2 22.7Strength (kips/ft) 0.443 0.441 0.439 0.437 0.435 0.433 0.431 0.430 0.429Stiffness, G' (kip/in) 19.8 20.6 21.3 21.9 22.6 23.3 23.9 24.5 25.1Strength (kips/ft) 0.530 0.528 0.526 0.525 0.523 0.522 0.520 0.519 0.518Stiffness, G' (kip/in) 20.7 21.5 22.3 23.1 23.8 24.5 25.3 26.0 26.6Strength (kips/ft) 0.655 0.653 0.652 0.651 0.650 0.649 0.649 0.648 0.647Stiffness, G' (kip/in) 21.7 22.6 23.5 24.3 25.2 26.0 26.8 27.6 28.4Strength (kips/ft) 0.733 0.732 0.731 0.731 0.730 0.729 0.729 0.728 0.728Stiffness, G' (kip/in) 22.3 23.2 24.2 25.1 26.0 26.9 27.7 28.6 29.4Strength (kips/ft) 0.815 0.815 0.815 0.814 0.814 0.814 0.814 0.813 0.813Stiffness, G' (kip/in) 22.9 23.9 24.9 25.9 26.8 27.8 28.7 29.6 30.5Strength (kips/ft) 0.380 0.375 0.371 0.368 0.364 0.361 0.358 0.356 0.353Stiffness, G' (kip/in) 52.5 52.8 53.0 53.1 53.3 53.4 53.6 53.7 53.8Strength (kips/ft) 0.523 0.519 0.515 0.511 0.507 0.504 0.501 0.498 0.495Stiffness, G' (kip/in) 62.1 62.7 63.2 63.7 64.2 64.6 65.0 65.4 65.7Strength (kips/ft) 0.647 0.642 0.638 0.634 0.630 0.627 0.624 0.621 0.619Stiffness, G' (kip/in) 69.4 70.3 71.2 71.9 72.7 73.3 74.0 74.6 75.1Strength (kips/ft) 0.863 0.859 0.855 0.852 0.849 0.846 0.844 0.842 0.839Stiffness, G' (kip/in) 80.0 81.4 82.7 83.9 85.0 86.0 87.1 88.0 88.9Strength (kips/ft) 1.041 1.037 1.035 1.032 1.030 1.027 1.025 1.023 1.022Stiffness, G' (kip/in) 87.2 88.9 90.6 92.1 93.5 94.9 96.2 97.4 98.5Strength (kips/ft) 1.297 1.295 1.293 1.292 1.290 1.289 1.287 1.286 1.285Stiffness, G' (kip/in) 96.5 98.7 100.7 102.7 104.5 106.3 108.0 109.6 111.1Strength (kips/ft) 0.542 0.530 0.519 0.509 0.500 0.491 0.483 0.476 0.469Stiffness, G' (kip/in) 61.4 61.6 61.8 61.9 61.9 62.0 62.0 62.0 62.0Strength (kips/ft) 0.686 0.674 0.663 0.653 0.643 0.635 0.627 0.620 0.613Stiffness, G' (kip/in) 68.9 69.5 70.0 70.5 70.9 71.3 71.6 71.9 72.2Strength (kips/ft) 0.815 0.804 0.793 0.783 0.774 0.766 0.758 0.751 0.745Stiffness, G' (kip/in) 74.9 75.8 76.6 77.3 78.0 78.6 79.2 79.8 80.3Strength (kips/ft) 1.053 1.043 1.033 1.024 1.016 1.009 1.002 0.995 0.989Stiffness, G' (kip/in) 83.7 85.0 86.3 87.5 88.6 89.7 90.6 91.6 92.4Strength (kips/ft) 1.267 1.257 1.249 1.241 1.234 1.227 1.221 1.215 1.210Stiffness, G' (kip/in) 89.9 91.6 93.2 94.7 96.1 97.5 98.8 100.0 101.1Strength (kips/ft) 1.617 1.610 1.604 1.598 1.592 1.587 1.583 1.578 1.574Stiffness, G' (kip/in) 98.0 100.2 102.3 104.2 106.1 107.8 109.5 111.1 112.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 148.83 8.01 7.29 6.67 6.13 5.65 5.22 4.84 4.50

Span (ft)

32/7

36

24

12

9

6

18

32/5

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

32/3

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

53

Design Thickness 0.0598 in.Support connection #12 screwsSide-lap connection #10 screws

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.440 0.438 0.435 0.433 0.431 0.429 0.427 0.426 0.424Stiffness, G' (kip/in) 29.2 29.9 30.6 31.2 31.8 32.4 33.0 33.5 34.0Strength (kips/ft) 0.583 0.581 0.579 0.577 0.576 0.574 0.573 0.571 0.570Stiffness, G' (kip/in) 32.7 33.6 34.5 35.3 36.2 37.0 37.7 38.5 39.2Strength (kips/ft) 0.697 0.695 0.694 0.692 0.691 0.690 0.689 0.688 0.687Stiffness, G' (kip/in) 34.9 36.0 37.0 38.0 39.0 39.9 40.8 41.7 42.6Strength (kips/ft) 0.853 0.852 0.851 0.850 0.850 0.849 0.848 0.848 0.847Stiffness, G' (kip/in) 37.6 38.9 40.1 41.3 42.4 43.5 44.7 45.7 46.8Strength (kips/ft) 0.946 0.946 0.945 0.944 0.944 0.944 0.943 0.943 0.942Stiffness, G' (kip/in) 39.2 40.5 41.9 43.2 44.4 45.7 46.9 48.1 49.3Strength (kips/ft) 1.039 1.039 1.039 1.039 1.039 1.038 1.038 1.038 1.038Stiffness, G' (kip/in) 40.9 42.4 43.9 45.3 46.7 48.1 49.5 50.8 52.1Strength (kips/ft) 0.495 0.491 0.488 0.484 0.481 0.478 0.475 0.473 0.470Stiffness, G' (kip/in) 66.0 66.0 66.0 65.9 65.9 65.8 65.8 65.7 65.6Strength (kips/ft) 0.690 0.686 0.682 0.678 0.674 0.671 0.668 0.665 0.662Stiffness, G' (kip/in) 80.6 80.9 81.2 81.5 81.7 81.9 82.1 82.3 82.5Strength (kips/ft) 0.857 0.853 0.849 0.846 0.842 0.839 0.837 0.834 0.831Stiffness, G' (kip/in) 92.3 93.0 93.5 94.1 94.5 95.0 95.4 95.8 96.2Strength (kips/ft) 1.148 1.144 1.141 1.138 1.135 1.133 1.131 1.128 1.126Stiffness, G' (kip/in) 110.1 111.2 112.2 113.2 114.1 115.0 115.8 116.6 117.3Strength (kips/ft) 1.379 1.376 1.374 1.372 1.369 1.368 1.366 1.364 1.362Stiffness, G' (kip/in) 122.8 124.3 125.8 127.1 128.4 129.6 130.7 131.8 132.8Strength (kips/ft) 1.698 1.696 1.695 1.693 1.692 1.691 1.690 1.689 1.688Stiffness, G' (kip/in) 139.9 142.1 144.0 145.9 147.7 149.4 151.0 152.5 153.9Strength (kips/ft) 0.680 0.668 0.657 0.647 0.638 0.629 0.621 0.613 0.606Stiffness, G' (kip/in) 78.5 78.2 78.0 77.7 77.5 77.2 76.9 76.7 76.4Strength (kips/ft) 0.879 0.867 0.856 0.845 0.836 0.827 0.819 0.811 0.804Stiffness, G' (kip/in) 90.6 90.8 90.9 91.0 91.1 91.1 91.2 91.2 91.2Strength (kips/ft) 1.056 1.044 1.034 1.024 1.015 1.007 0.999 0.992 0.985Stiffness, G' (kip/in) 100.5 101.1 101.5 101.9 102.3 102.6 102.9 103.2 103.5Strength (kips/ft) 1.383 1.373 1.364 1.355 1.347 1.339 1.332 1.326 1.320Stiffness, G' (kip/in) 115.9 116.9 117.9 118.8 119.7 120.5 121.2 121.9 122.6Strength (kips/ft) 1.671 1.662 1.654 1.646 1.639 1.633 1.627 1.621 1.616Stiffness, G' (kip/in) 127.2 128.6 130.0 131.3 132.5 133.7 134.8 135.8 136.7Strength (kips/ft) 2.130 2.124 2.118 2.112 2.107 2.102 2.098 2.094 2.090Stiffness, G' (kip/in) 142.6 144.7 146.7 148.5 150.3 151.9 153.5 155.0 156.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.2 9.32 8.56 7.89 7.29 6.76 6.29 5.86 5.48

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

54

Design Thickness 0.0299 in.Support connection 3/4" Arc Spot WeldSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.609 0.605 0.601 0.598 0.595 0.592 0.590 0.587 0.585Stiffness, G' (kip/in) 5.98 6.33 6.67 7.01 7.35 7.68 8.01 8.34 8.66Strength (kips/ft) 0.797 0.793 0.791 0.788 0.786 0.783 0.782 0.780 0.778Stiffness, G' (kip/in) 6.10 6.45 6.81 7.16 7.51 7.86 8.20 8.54 8.88Strength (kips/ft) 0.938 0.935 0.933 0.931 0.930 0.928 0.927 0.925 0.924Stiffness, G' (kip/in) 6.15 6.51 6.87 7.23 7.59 7.94 8.29 8.64 8.99Strength (kips/ft) 1.119 1.117 1.116 1.115 1.114 1.113 1.113 1.112 1.111Stiffness, G' (kip/in) 6.20 6.57 6.94 7.30 7.66 8.03 8.38 8.74 9.10Strength (kips/ft) 1.219 1.218 1.217 1.217 1.216 1.216 1.215 1.215 1.215Stiffness, G' (kip/in) 6.23 6.60 6.97 7.34 7.70 8.07 8.43 8.79 9.15Strength (kips/ft) 1.313 1.313 1.313 1.313 1.312 1.312 1.312 1.312 1.312Stiffness, G' (kip/in) 6.25 6.63 7.00 7.37 7.74 8.11 8.48 8.84 9.2Strength (kips/ft) 0.707 0.699 0.693 0.687 0.681 0.676 0.672 0.668 0.664Stiffness, G' (kip/in) 31.2 32.4 33.5 34.6 35.6 36.6 37.5 38.5 39.3Strength (kips/ft) 0.979 0.970 0.962 0.956 0.949 0.944 0.939 0.934 0.930Stiffness, G' (kip/in) 33.8 35.2 36.5 37.8 39.0 40.2 41.4 42.5 43.5Strength (kips/ft) 1.205 1.197 1.191 1.184 1.179 1.174 1.169 1.165 1.161Stiffness, G' (kip/in) 35.2 36.8 38.2 39.6 41.0 42.3 43.6 44.8 46.0Strength (kips/ft) 1.583 1.577 1.572 1.567 1.563 1.559 1.555 1.552 1.549Stiffness, G' (kip/in) 36.8 38.5 40.1 41.6 43.2 44.6 46.0 47.4 48.7Strength (kips/ft) 1.868 1.863 1.859 1.856 1.853 1.850 1.847 1.845 1.843Stiffness, G' (kip/in) 37.7 39.4 41.1 42.7 44.3 45.9 47.4 48.8 50.2Strength (kips/ft) 2.23 2.23 2.23 2.23 2.23 2.22 2.22 2.22 2.22Stiffness, G' (kip/in) 38.6 40.4 42.2 43.9 45.5 47.2 48.8 50.3 51.8Strength (kips/ft) 1.021 0.995 0.972 0.951 0.932 0.915 0.900 0.886 0.873Stiffness, G' (kip/in) 32.7 33.9 35.0 36.1 37.2 38.2 39.2 40.1 41.0Strength (kips/ft) 1.292 1.267 1.245 1.225 1.207 1.191 1.176 1.162 1.149Stiffness, G' (kip/in) 34.6 36.0 37.4 38.7 39.9 41.1 42.3 43.4 44.5Strength (kips/ft) 1.535 1.511 1.490 1.471 1.454 1.439 1.425 1.412 1.400Stiffness, G' (kip/in) 35.7 37.3 38.7 40.2 41.5 42.9 44.1 45.4 46.6Strength (kips/ft) 1.970 1.950 1.932 1.916 1.901 1.888 1.875 1.864 1.854Stiffness, G' (kip/in) 37.1 38.7 40.4 41.9 43.4 44.9 46.3 47.7 49.0Strength (kips/ft) 2.338 2.321 2.306 2.293 2.280 2.269 2.259 2.249 2.241Stiffness, G' (kip/in) 37.8 39.6 41.3 42.9 44.5 46.0 47.5 49.0 50.4Strength (kips/ft) 2.893 2.882 2.872 2.863 2.855 2.847 2.840 2.834 2.828Stiffness, G' (kip/in) 38.6 40.5 42.2 44.0 45.6 47.3 48.8 50.4 51.9

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 126.86 6.08 5.42 4.86 4.39 3.98 3.63 3.32 3.05

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

55

Design Thickness 0.0359 in.Support connection 3/4" Arc Spot WeldSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.790 0.784 0.780 0.776 0.772 0.768 0.765 0.762 0.759Stiffness, G' (kip/in) 10.19 10.69 11.19 11.7 12.2 12.6 13.1 13.6 14.0Strength (kips/ft) 1.037 1.033 1.029 1.026 1.023 1.020 1.018 1.015 1.013Stiffness, G' (kip/in) 10.48 11.0 11.5 12.0 12.6 13.1 13.6 14.1 14.6Strength (kips/ft) 1.227 1.224 1.221 1.219 1.217 1.215 1.213 1.211 1.209Stiffness, G' (kip/in) 10.6 11.2 11.7 12.2 12.8 13.3 13.8 14.3 14.8Strength (kips/ft) 1.477 1.476 1.474 1.473 1.471 1.470 1.469 1.468 1.467Stiffness, G' (kip/in) 10.8 11.3 11.9 12.4 13.0 13.5 14.0 14.6 15.1Strength (kips/ft) 1.619 1.618 1.617 1.617 1.616 1.615 1.615 1.614 1.613Stiffness, G' (kip/in) 10.8 11.4 12.0 12.5 13.1 13.6 14.1 14.7 15.2Strength (kips/ft) 1.756 1.756 1.756 1.755 1.755 1.755 1.755 1.754 1.754Stiffness, G' (kip/in) 10.9 11.5 12.0 12.6 13.2 13.7 14.3 14.8 15.4Strength (kips/ft) 0.905 0.897 0.889 0.881 0.875 0.869 0.864 0.858 0.854Stiffness, G' (kip/in) 45.6 46.9 48.1 49.2 50.3 51.3 52.3 53.3 54.2Strength (kips/ft) 1.256 1.246 1.237 1.229 1.222 1.215 1.209 1.203 1.198Stiffness, G' (kip/in) 50.8 52.4 53.9 55.3 56.7 58.0 59.3 60.5 61.6Strength (kips/ft) 1.552 1.543 1.535 1.527 1.521 1.515 1.509 1.504 1.499Stiffness, G' (kip/in) 53.9 55.7 57.4 59.0 60.5 62.0 63.5 64.9 66.2Strength (kips/ft) 2.053 2.046 2.039 2.033 2.028 2.023 2.019 2.015 2.011Stiffness, G' (kip/in) 57.3 59.4 61.3 63.1 64.9 66.6 68.3 69.9 71.5Strength (kips/ft) 2.438 2.433 2.428 2.424 2.420 2.416 2.413 2.410 2.407Stiffness, G' (kip/in) 59.2 61.4 63.4 65.4 67.4 69.2 71.0 72.7 74.4Strength (kips/ft) 2.946 2.943 2.940 2.938 2.935 2.933 2.931 2.930 2.928Stiffness, G' (kip/in) 61.3 63.6 65.8 67.9 70.0 72.0 73.9 75.8 77.6Strength (kips/ft) 1.281 1.253 1.227 1.204 1.183 1.163 1.146 1.129 1.114Stiffness, G' (kip/in) 48.3 49.5 50.8 51.9 53.0 54.0 55.0 56.0 56.9Strength (kips/ft) 1.635 1.607 1.582 1.559 1.539 1.519 1.502 1.486 1.471Stiffness, G' (kip/in) 52.3 53.9 55.4 56.9 58.3 59.6 60.8 62.1 63.2Strength (kips/ft) 1.951 1.924 1.901 1.879 1.859 1.841 1.825 1.809 1.795Stiffness, G' (kip/in) 54.9 56.6 58.4 60.0 61.6 63.1 64.5 65.9 67.2Strength (kips/ft) 2.524 2.501 2.480 2.461 2.444 2.428 2.414 2.400 2.388Stiffness, G' (kip/in) 57.8 59.9 61.8 63.7 65.5 67.2 68.8 70.5 72.0Strength (kips/ft) 3.016 2.996 2.979 2.963 2.948 2.934 2.922 2.911 2.900Stiffness, G' (kip/in) 59.5 61.7 63.8 65.8 67.7 69.5 71.3 73.1 74.8Strength (kips/ft) 3.773 3.760 3.747 3.736 3.726 3.717 3.708 3.700 3.693Stiffness, G' (kip/in) 61.4 63.7 65.9 68.1 70.1 72.1 74.1 76.0 77.8

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.10 6.37 5.75 5.21 4.75 4.35 3.99 3.68 3.40

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

56

Design Thickness 0.0478 in.Support connection 3/4" Arc Spot WeldSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.080 1.076 1.072 1.069 1.066 1.063 1.060 1.058 1.055Stiffness, G' (kip/in) 21.0 21.9 22.7 23.5 24.3 25.1 25.9 26.7 27.4Strength (kips/ft) 1.426 1.423 1.420 1.417 1.415 1.413 1.411 1.409 1.407Stiffness, G' (kip/in) 22.1 23.0 23.9 24.8 25.7 26.6 27.5 28.3 29.2Strength (kips/ft) 1.682 1.679 1.677 1.675 1.674 1.672 1.670 1.669 1.668Stiffness, G' (kip/in) 22.6 23.6 24.6 25.5 26.5 27.4 28.3 29.2 30.1Strength (kips/ft) 2.001 2.000 1.999 1.998 1.997 1.996 1.995 1.995 1.994Stiffness, G' (kip/in) 23.2 24.2 25.2 26.2 27.2 28.2 29.1 30.1 31.0Strength (kips/ft) 2.173 2.172 2.172 2.171 2.171 2.170 2.170 2.169 2.169Stiffness, G' (kip/in) 23.5 24.5 25.6 26.6 27.6 28.6 29.6 30.6 31.5Strength (kips/ft) 2.331 2.331 2.331 2.331 2.331 2.330 2.330 2.330 2.330Stiffness, G' (kip/in) 23.8 24.8 25.9 26.9 28.0 29.0 30.0 31.0 32.0Strength (kips/ft) 1.243 1.235 1.228 1.222 1.216 1.210 1.205 1.201 1.196Stiffness, G' (kip/in) 72.7 74.0 75.2 76.3 77.4 78.4 79.3 80.2 81.1Strength (kips/ft) 1.734 1.725 1.717 1.709 1.702 1.696 1.690 1.684 1.679Stiffness, G' (kip/in) 84.7 86.4 88.0 89.6 91.0 92.4 93.7 95.0 96.2Strength (kips/ft) 2.154 2.146 2.139 2.132 2.126 2.121 2.115 2.110 2.106Stiffness, G' (kip/in) 92.3 94.3 96.2 98.1 99.8 101.5 103.1 104.6 106.0Strength (kips/ft) 2.847 2.841 2.836 2.831 2.826 2.822 2.818 2.814 2.811Stiffness, G' (kip/in) 101.3 103.7 106.1 108.3 110.5 112.5 114.5 116.3 118.1Strength (kips/ft) 3.360 3.355 3.351 3.348 3.344 3.341 3.338 3.336 3.333Stiffness, G' (kip/in) 106.5 109.2 111.8 114.3 116.7 119.0 121.1 123.2 125.3Strength (kips/ft) 4.001 3.998 3.996 3.994 3.993 3.991 3.989 3.988 3.987Stiffness, G' (kip/in) 112.2 115.3 118.2 121.0 123.6 126.2 128.7 131.0 133.3Strength (kips/ft) 1.686 1.657 1.631 1.607 1.585 1.565 1.546 1.529 1.513Stiffness, G' (kip/in) 78.1 79.3 80.5 81.5 82.6 83.5 84.4 85.2 86.0Strength (kips/ft) 2.192 2.164 2.138 2.115 2.093 2.073 2.055 2.038 2.022Stiffness, G' (kip/in) 88.0 89.7 91.3 92.8 94.3 95.6 96.9 98.1 99.3Strength (kips/ft) 2.649 2.622 2.598 2.576 2.556 2.538 2.520 2.504 2.489Stiffness, G' (kip/in) 94.5 96.5 98.5 100.3 102.0 103.7 105.3 106.8 108.2Strength (kips/ft) 3.466 3.444 3.423 3.405 3.387 3.371 3.357 3.343 3.330Stiffness, G' (kip/in) 102.5 105.0 107.3 109.6 111.7 113.7 115.7 117.5 119.3Strength (kips/ft) 4.151 4.133 4.116 4.100 4.086 4.073 4.061 4.049 4.039Stiffness, G' (kip/in) 107.3 110.0 112.6 115.1 117.5 119.7 121.9 124.0 126.0Strength (kips/ft) 5.168 5.156 5.144 5.134 5.125 5.116 5.108 5.101 5.094Stiffness, G' (kip/in) 112.6 115.7 118.6 121.4 124.0 126.6 129.0 131.4 133.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 148.83 8.01 7.29 6.67 6.13 5.65 5.22 4.84 4.50

Span (ft)

32/7

36

24

12

9

6

18

32/5

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

32/3

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

57

Design Thickness 0.0598 in.Support connection 3/4" Arc Spot WeldSide-lap connection 1-1/2" Arc Seam Weld

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 1.385 1.382 1.379 1.377 1.374 1.372 1.370 1.368 1.366Stiffness, G' (kip/in) 35.8 37.0 38.2 39.3 40.4 41.4 42.5 43.5 44.5Strength (kips/ft) 1.829 1.827 1.825 1.823 1.821 1.820 1.818 1.817 1.816Stiffness, G' (kip/in) 38.7 40.0 41.3 42.6 43.9 45.1 46.3 47.5 48.7Strength (kips/ft) 2.146 2.145 2.143 2.142 2.141 2.140 2.139 2.138 2.137Stiffness, G' (kip/in) 40.1 41.6 43.0 44.4 45.8 47.1 48.4 49.7 51.0Strength (kips/ft) 2.526 2.525 2.525 2.524 2.523 2.523 2.522 2.522 2.521Stiffness, G' (kip/in) 41.7 43.3 44.8 46.3 47.8 49.3 50.7 52.1 53.5Strength (kips/ft) 2.721 2.721 2.720 2.720 2.720 2.719 2.719 2.719 2.719Stiffness, G' (kip/in) 42.5 44.1 45.7 47.3 48.8 50.4 51.9 53.4 54.8Strength (kips/ft) 2.895 2.895 2.895 2.895 2.894 2.894 2.894 2.894 2.894Stiffness, G' (kip/in) 43.3 45.0 46.7 48.3 49.9 51.5 53.1 54.7 56.2Strength (kips/ft) 1.602 1.596 1.590 1.585 1.580 1.575 1.571 1.567 1.563Stiffness, G' (kip/in) 98.4 99.5 100.5 101.5 102.4 103.3 104.1 104.8 105.6Strength (kips/ft) 2.238 2.230 2.223 2.216 2.210 2.205 2.199 2.194 2.190Stiffness, G' (kip/in) 118.7 120.3 121.8 123.2 124.5 125.8 127.0 128.1 129.2Strength (kips/ft) 2.788 2.781 2.775 2.769 2.764 2.759 2.754 2.750 2.746Stiffness, G' (kip/in) 132.3 134.3 136.1 137.9 139.6 141.1 142.6 144.1 145.4Strength (kips/ft) 3.672 3.667 3.662 3.658 3.654 3.650 3.647 3.644 3.641Stiffness, G' (kip/in) 149.3 151.9 154.3 156.5 158.7 160.7 162.7 164.5 166.3Strength (kips/ft) 4.302 4.298 4.295 4.292 4.290 4.287 4.285 4.282 4.280Stiffness, G' (kip/in) 159.6 162.5 165.2 167.8 170.3 172.7 174.9 177.1 179.1Strength (kips/ft) 5.057 5.055 5.053 5.052 5.050 5.049 5.048 5.047 5.046Stiffness, G' (kip/in) 171.4 174.7 177.9 180.9 183.8 186.5 189.2 191.7 194.1Strength (kips/ft) 2.098 2.070 2.044 2.021 1.999 1.979 1.960 1.942 1.926Stiffness, G' (kip/in) 106.6 107.6 108.5 109.3 110.1 110.8 111.5 112.1 112.7Strength (kips/ft) 2.765 2.738 2.713 2.690 2.669 2.649 2.631 2.613 2.597Stiffness, G' (kip/in) 124.1 125.6 127.0 128.3 129.6 130.8 131.9 133.0 134.0Strength (kips/ft) 3.373 3.348 3.325 3.304 3.284 3.266 3.248 3.233 3.218Stiffness, G' (kip/in) 136.1 138.0 139.8 141.5 143.2 144.7 146.2 147.5 148.9Strength (kips/ft) 4.447 4.426 4.406 4.389 4.372 4.357 4.343 4.329 4.317Stiffness, G' (kip/in) 151.5 154.0 156.4 158.6 160.8 162.8 164.7 166.5 168.3Strength (kips/ft) 5.326 5.309 5.294 5.279 5.266 5.254 5.242 5.231 5.221Stiffness, G' (kip/in) 161.0 163.9 166.6 169.2 171.7 174.0 176.3 178.4 180.4Strength (kips/ft) 6.587 6.577 6.567 6.558 6.550 6.542 6.535 6.528 6.521Stiffness, G' (kip/in) 172.1 175.5 178.6 181.6 184.5 187.2 189.9 192.4 194.8

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.2 9.32 8.56 7.89 7.29 6.76 6.29 5.86 5.48

Span (ft)

32/7

36

24

18

12

9

6

32/5

36

24

18

12

9

6

32/3

36

24

18

12

9

6

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

58

Design Thickness 0.0299 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.288 0.273 0.259 0.248 0.237 0.227 0.218 0.210 0.203Stiffness, G' (kip/in) 5.38 5.60 5.82 6.02 6.21 6.39 6.56 6.72 6.86Strength (kips/ft) 0.304 0.289 0.276 0.264 0.253 0.244 0.235 0.227 0.220Stiffness, G' (kip/in) 5.43 5.67 5.89 6.11 6.31 6.51 6.69 6.86 7.03Strength (kips/ft) 0.321 0.306 0.293 0.281 0.270 0.260 0.252 0.244 0.236Stiffness, G' (kip/in) 5.47 5.72 5.96 6.19 6.40 6.61 6.81 6.99 7.17Strength (kips/ft) 0.354 0.339 0.326 0.314 0.303 0.294 0.285 0.277 0.270Stiffness, G' (kip/in) 5.55 5.82 6.07 6.32 6.55 6.78 7.00 7.21 7.41Strength (kips/ft) 0.388 0.373 0.359 0.348 0.337 0.327 0.318 0.310 0.303Stiffness, G' (kip/in) 5.62 5.90 6.16 6.42 6.67 6.92 7.15 7.38 7.60Strength (kips/ft) 0.454 0.439 0.426 0.414 0.403 0.394 0.385 0.377 0.370Stiffness, G' (kip/in) 5.72 6.02 6.30 6.58 6.86 7.12 7.39 7.64 7.9Strength (kips/ft) 0.366 0.347 0.329 0.314 0.300 0.287 0.275 0.265 0.255Stiffness, G' (kip/in) 23.0 23.1 23.1 23.0 22.9 22.8 22.6 22.5 22.3Strength (kips/ft) 0.383 0.363 0.346 0.330 0.316 0.304 0.292 0.282 0.272Stiffness, G' (kip/in) 23.5 23.6 23.6 23.6 23.6 23.5 23.4 23.3 23.1Strength (kips/ft) 0.399 0.380 0.363 0.347 0.333 0.320 0.309 0.298 0.289Stiffness, G' (kip/in) 23.9 24.1 24.2 24.2 24.3 24.2 24.2 24.1 24.0Strength (kips/ft) 0.433 0.413 0.396 0.380 0.366 0.354 0.342 0.332 0.322Stiffness, G' (kip/in) 24.7 25.0 25.2 25.4 25.5 25.5 25.6 25.6 25.5Strength (kips/ft) 0.466 0.447 0.429 0.414 0.400 0.387 0.375 0.365 0.355Stiffness, G' (kip/in) 25.5 25.8 26.1 26.4 26.5 26.7 26.8 26.9 27.0Strength (kips/ft) 0.53 0.51 0.50 0.48 0.47 0.45 0.44 0.43 0.42Stiffness, G' (kip/in) 26.8 27.3 27.7 28.1 28.4 28.7 29.0 29.2 29.4Strength (kips/ft) 0.680 0.642 0.608 0.578 0.551 0.526 0.504 0.483 0.464Stiffness, G' (kip/in) 27.6 28.0 28.3 28.5 28.6 28.7 28.7 28.7 28.7Strength (kips/ft) 0.697 0.659 0.625 0.595 0.567 0.543 0.520 0.500 0.481Stiffness, G' (kip/in) 27.8 28.3 28.6 28.8 29.0 29.2 29.2 29.3 29.2Strength (kips/ft) 0.713 0.675 0.642 0.611 0.584 0.559 0.537 0.517 0.498Stiffness, G' (kip/in) 28.1 28.5 28.9 29.2 29.4 29.6 29.7 29.8 29.8Strength (kips/ft) 0.747 0.709 0.675 0.645 0.617 0.593 0.570 0.550 0.531Stiffness, G' (kip/in) 28.6 29.1 29.5 29.9 30.2 30.4 30.6 30.7 30.8Strength (kips/ft) 0.780 0.742 0.708 0.678 0.651 0.626 0.604 0.583 0.564Stiffness, G' (kip/in) 29.0 29.6 30.1 30.5 30.9 31.2 31.4 31.6 31.8Strength (kips/ft) 0.847 0.809 0.775 0.745 0.717 0.693 0.670 0.650 0.631Stiffness, G' (kip/in) 29.7 30.4 31.1 31.6 32.1 32.5 32.9 33.2 33.5

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 126.86 6.08 5.42 4.86 4.39 3.98 3.63 3.32 3.05

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

32/3

36

24

18

12

9

6

32/5

36

24

18

12

9

6

Span (ft)

32/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

59

Design Thickness 0.0359 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.342 0.326 0.311 0.298 0.286 0.275 0.265 0.255 0.247Stiffness, G' (kip/in) 8.46 8.70 8.92 9.12 9.31 9.47 9.62 9.76 9.88Strength (kips/ft) 0.358 0.342 0.328 0.314 0.302 0.291 0.281 0.272 0.264Stiffness, G' (kip/in) 8.61 8.87 9.11 9.34 9.55 9.74 9.92 10.08 10.24Strength (kips/ft) 0.375 0.359 0.344 0.331 0.319 0.308 0.298 0.289 0.280Stiffness, G' (kip/in) 8.73 9.02 9.28 9.53 9.76 9.98 10.18 10.37 10.55Strength (kips/ft) 0.408 0.392 0.378 0.364 0.352 0.341 0.331 0.322 0.314Stiffness, G' (kip/in) 8.96 9.27 9.57 9.86 10.13 10.39 10.63 10.86 11.08Strength (kips/ft) 0.442 0.426 0.411 0.398 0.386 0.375 0.365 0.355 0.347Stiffness, G' (kip/in) 9.14 9.48 9.81 10.12 10.43 10.72 10.99 11.26 11.51Strength (kips/ft) 0.508 0.492 0.478 0.464 0.452 0.441 0.431 0.422 0.414Stiffness, G' (kip/in) 9.42 9.80 10.18 10.53 10.88 11.22 11.55 11.86 12.2Strength (kips/ft) 0.436 0.415 0.396 0.378 0.363 0.348 0.335 0.323 0.312Stiffness, G' (kip/in) 29.2 28.9 28.6 28.2 27.9 27.5 27.1 26.7 26.3Strength (kips/ft) 0.452 0.431 0.412 0.395 0.379 0.365 0.352 0.340 0.329Stiffness, G' (kip/in) 30.1 29.8 29.6 29.3 29.0 28.6 28.3 28.0 27.6Strength (kips/ft) 0.469 0.448 0.429 0.412 0.396 0.382 0.369 0.356 0.345Stiffness, G' (kip/in) 30.9 30.7 30.5 30.3 30.0 29.7 29.5 29.2 28.9Strength (kips/ft) 0.502 0.481 0.462 0.445 0.429 0.415 0.402 0.390 0.379Stiffness, G' (kip/in) 32.4 32.3 32.2 32.1 32.0 31.8 31.6 31.4 31.2Strength (kips/ft) 0.536 0.515 0.496 0.478 0.463 0.448 0.435 0.423 0.412Stiffness, G' (kip/in) 33.8 33.8 33.8 33.8 33.8 33.7 33.6 33.5 33.4Strength (kips/ft) 0.60 0.58 0.56 0.54 0.53 0.51 0.50 0.49 0.48Stiffness, G' (kip/in) 36.2 36.5 36.7 36.8 37.0 37.1 37.1 37.2 37.2Strength (kips/ft) 0.812 0.771 0.734 0.701 0.670 0.643 0.617 0.594 0.572Stiffness, G' (kip/in) 37.1 37.1 37.0 36.8 36.6 36.3 36.0 35.7 35.4Strength (kips/ft) 0.828 0.788 0.751 0.717 0.687 0.659 0.634 0.611 0.589Stiffness, G' (kip/in) 37.6 37.6 37.6 37.5 37.3 37.1 36.9 36.6 36.3Strength (kips/ft) 0.845 0.804 0.767 0.734 0.704 0.676 0.651 0.627 0.606Stiffness, G' (kip/in) 38.1 38.2 38.2 38.1 38.0 37.9 37.7 37.5 37.2Strength (kips/ft) 0.878 0.838 0.801 0.767 0.737 0.709 0.684 0.661 0.639Stiffness, G' (kip/in) 39.1 39.3 39.4 39.4 39.4 39.3 39.2 39.1 38.9Strength (kips/ft) 0.912 0.871 0.834 0.801 0.770 0.743 0.717 0.694 0.672Stiffness, G' (kip/in) 40.0 40.2 40.4 40.6 40.6 40.7 40.6 40.6 40.5Strength (kips/ft) 0.978 0.938 0.901 0.867 0.837 0.809 0.784 0.761 0.739Stiffness, G' (kip/in) 41.6 42.0 42.4 42.7 42.9 43.1 43.2 43.3 43.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.10 6.37 5.75 5.21 4.75 4.35 3.99 3.68 3.40

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

32/3

36

24

18

12

9

6

32/5

36

24

18

12

9

6

Span (ft)

32/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

60

Design Thickness 0.0478 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.400 0.382 0.367 0.352 0.339 0.327 0.315 0.305 0.295Stiffness, G' (kip/in) 14.9 15.0 15.2 15.3 15.4 15.4 15.5 15.5 15.5Strength (kips/ft) 0.417 0.399 0.383 0.369 0.356 0.343 0.332 0.322 0.312Stiffness, G' (kip/in) 15.3 15.6 15.7 15.9 16.0 16.2 16.2 16.3 16.4Strength (kips/ft) 0.433 0.416 0.400 0.385 0.372 0.360 0.349 0.338 0.329Stiffness, G' (kip/in) 15.8 16.0 16.3 16.5 16.6 16.8 16.9 17.1 17.2Strength (kips/ft) 0.467 0.449 0.433 0.419 0.406 0.393 0.382 0.372 0.362Stiffness, G' (kip/in) 16.5 16.8 17.1 17.4 17.7 17.9 18.2 18.4 18.5Strength (kips/ft) 0.500 0.482 0.467 0.452 0.439 0.427 0.415 0.405 0.395Stiffness, G' (kip/in) 17.1 17.5 17.9 18.2 18.6 18.9 19.2 19.4 19.7Strength (kips/ft) 0.567 0.549 0.533 0.519 0.506 0.493 0.482 0.472 0.462Stiffness, G' (kip/in) 18.1 18.6 19.1 19.5 20.0 20.4 20.8 21.2 21.5Strength (kips/ft) 0.511 0.488 0.467 0.448 0.431 0.415 0.401 0.387 0.374Stiffness, G' (kip/in) 38.4 37.6 36.8 36.0 35.3 34.5 33.8 33.2 32.5Strength (kips/ft) 0.527 0.505 0.484 0.465 0.448 0.432 0.417 0.404 0.391Stiffness, G' (kip/in) 39.9 39.2 38.5 37.7 37.1 36.4 35.7 35.1 34.5Strength (kips/ft) 0.544 0.521 0.501 0.482 0.464 0.449 0.434 0.420 0.408Stiffness, G' (kip/in) 41.4 40.7 40.1 39.4 38.8 38.2 37.6 37.0 36.4Strength (kips/ft) 0.577 0.555 0.534 0.515 0.498 0.482 0.467 0.454 0.441Stiffness, G' (kip/in) 44.2 43.7 43.1 42.6 42.1 41.5 41.0 40.5 40.0Strength (kips/ft) 0.611 0.588 0.567 0.548 0.531 0.515 0.501 0.487 0.474Stiffness, G' (kip/in) 46.9 46.4 46.0 45.6 45.1 44.7 44.3 43.9 43.5Strength (kips/ft) 0.677 0.655 0.634 0.615 0.598 0.582 0.567 0.554 0.541Stiffness, G' (kip/in) 51.7 51.5 51.2 51.0 50.7 50.5 50.2 50.0 49.7Strength (kips/ft) 0.954 0.910 0.870 0.834 0.800 0.770 0.741 0.715 0.691Stiffness, G' (kip/in) 52.1 51.4 50.6 49.8 49.0 48.2 47.4 46.6 45.8Strength (kips/ft) 0.970 0.927 0.887 0.850 0.817 0.786 0.758 0.732 0.707Stiffness, G' (kip/in) 53.2 52.5 51.8 51.1 50.3 49.6 48.9 48.1 47.4Strength (kips/ft) 0.987 0.943 0.903 0.867 0.834 0.803 0.775 0.748 0.724Stiffness, G' (kip/in) 54.3 53.7 53.0 52.3 51.7 51.0 50.3 49.6 48.9Strength (kips/ft) 1.020 0.977 0.937 0.900 0.867 0.836 0.808 0.782 0.757Stiffness, G' (kip/in) 56.3 55.8 55.3 54.7 54.2 53.6 53.0 52.4 51.8Strength (kips/ft) 1.054 1.010 0.970 0.934 0.900 0.870 0.841 0.815 0.791Stiffness, G' (kip/in) 58.3 57.9 57.5 57.0 56.5 56.1 55.6 55.1 54.6Strength (kips/ft) 1.120 1.077 1.037 1.000 0.967 0.936 0.908 0.882 0.857Stiffness, G' (kip/in) 61.8 61.6 61.4 61.2 60.9 60.6 60.3 60.0 59.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 148.83 8.01 7.29 6.67 6.13 5.65 5.22 4.84 4.50

32/3

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

32/5

36

24

12

9

6

18

Span (ft)

32/7

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

61

Design Thickness 0.0598 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button Punch

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.445 0.427 0.411 0.396 0.382 0.369 0.357 0.346 0.335Stiffness, G' (kip/in) 21.1 21.1 21.0 20.9 20.8 20.7 20.6 20.5 20.3Strength (kips/ft) 0.462 0.444 0.428 0.412 0.399 0.386 0.374 0.362 0.352Stiffness, G' (kip/in) 22.1 22.1 22.1 22.1 22.1 22.0 22.0 21.9 21.8Strength (kips/ft) 0.479 0.461 0.444 0.429 0.415 0.402 0.390 0.379 0.369Stiffness, G' (kip/in) 23.0 23.1 23.2 23.2 23.2 23.3 23.3 23.2 23.2Strength (kips/ft) 0.512 0.494 0.478 0.462 0.449 0.436 0.424 0.412 0.402Stiffness, G' (kip/in) 24.6 24.8 25.0 25.2 25.3 25.4 25.5 25.6 25.7Strength (kips/ft) 0.545 0.527 0.511 0.496 0.482 0.469 0.457 0.446 0.435Stiffness, G' (kip/in) 26.0 26.3 26.6 26.9 27.1 27.3 27.5 27.7 27.9Strength (kips/ft) 0.612 0.594 0.578 0.562 0.549 0.536 0.524 0.512 0.502Stiffness, G' (kip/in) 28.3 28.8 29.2 29.7 30.1 30.4 30.8 31.1 31.4Strength (kips/ft) 0.569 0.546 0.524 0.505 0.487 0.470 0.454 0.440 0.426Stiffness, G' (kip/in) 44.3 43.2 42.1 41.1 40.1 39.2 38.4 37.5 36.7Strength (kips/ft) 0.586 0.562 0.541 0.521 0.503 0.487 0.471 0.456 0.443Stiffness, G' (kip/in) 46.5 45.4 44.4 43.4 42.5 41.7 40.8 40.0 39.3Strength (kips/ft) 0.602 0.579 0.558 0.538 0.520 0.503 0.488 0.473 0.460Stiffness, G' (kip/in) 48.6 47.6 46.6 45.7 44.8 44.0 43.2 42.5 41.7Strength (kips/ft) 0.636 0.612 0.591 0.571 0.553 0.537 0.521 0.506 0.493Stiffness, G' (kip/in) 52.6 51.8 50.9 50.1 49.3 48.6 47.8 47.2 46.5Strength (kips/ft) 0.669 0.646 0.624 0.605 0.587 0.570 0.554 0.540 0.526Stiffness, G' (kip/in) 56.5 55.7 55.0 54.2 53.5 52.9 52.2 51.6 51.0Strength (kips/ft) 0.736 0.712 0.691 0.671 0.653 0.637 0.621 0.606 0.593Stiffness, G' (kip/in) 63.6 63.0 62.5 61.9 61.4 60.9 60.4 59.9 59.5Strength (kips/ft) 1.064 1.020 0.978 0.941 0.906 0.873 0.843 0.815 0.789Stiffness, G' (kip/in) 62.7 61.4 60.1 58.8 57.6 56.4 55.3 54.2 53.1Strength (kips/ft) 1.081 1.036 0.995 0.957 0.922 0.890 0.860 0.832 0.806Stiffness, G' (kip/in) 64.4 63.2 61.9 60.7 59.6 58.4 57.3 56.3 55.2Strength (kips/ft) 1.098 1.053 1.012 0.974 0.939 0.907 0.877 0.849 0.823Stiffness, G' (kip/in) 66.1 64.9 63.7 62.6 61.4 60.4 59.3 58.3 57.3Strength (kips/ft) 1.131 1.086 1.045 1.007 0.972 0.940 0.910 0.882 0.856Stiffness, G' (kip/in) 69.3 68.2 67.1 66.1 65.1 64.1 63.2 62.2 61.4Strength (kips/ft) 1.164 1.120 1.078 1.041 1.006 0.973 0.943 0.915 0.889Stiffness, G' (kip/in) 72.3 71.4 70.4 69.5 68.6 67.7 66.8 66.0 65.2Strength (kips/ft) 1.231 1.186 1.145 1.107 1.072 1.040 1.010 0.982 0.956Stiffness, G' (kip/in) 78.0 77.3 76.5 75.8 75.1 74.4 73.7 73.0 72.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.2 9.32 8.56 7.89 7.29 6.76 6.29 5.86 5.48

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

32/3

36

24

18

12

9

6

32/5

36

24

18

12

9

6

Span (ft)

32/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

62

Design Thickness 0.0299 in.Support connection 3/4" Arc Spot WeldSide-lap connection #10 Screw

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.356 0.343 0.332 0.322 0.313 0.305 0.297 0.291 0.284Stiffness, G' (kip/in) 5.75 6.06 6.36 6.66 6.95 7.24 7.52 7.80 8.07Strength (kips/ft) 0.427 0.414 0.403 0.393 0.384 0.376 0.368 0.362 0.355Stiffness, G' (kip/in) 5.89 6.22 6.54 6.86 7.18 7.49 7.80 8.10 8.40Strength (kips/ft) 0.498 0.485 0.474 0.464 0.455 0.447 0.439 0.433 0.426Stiffness, G' (kip/in) 5.98 6.32 6.65 6.98 7.31 7.64 7.96 8.28 8.59Strength (kips/ft) 0.618 0.606 0.596 0.587 0.579 0.571 0.564 0.558 0.552Stiffness, G' (kip/in) 6.07 6.42 6.77 7.12 7.46 7.80 8.14 8.47 8.81Strength (kips/ft) 0.715 0.705 0.696 0.688 0.680 0.674 0.668 0.662 0.657Stiffness, G' (kip/in) 6.12 6.48 6.84 7.19 7.54 7.89 8.24 8.58 8.92Strength (kips/ft) 0.874 0.867 0.860 0.854 0.848 0.843 0.838 0.834 0.830Stiffness, G' (kip/in) 6.18 6.54 6.91 7.27 7.63 7.99 8.34 8.69 9.0Strength (kips/ft) 0.434 0.417 0.402 0.388 0.376 0.365 0.354 0.345 0.337Stiffness, G' (kip/in) 27.1 27.8 28.4 29.0 29.5 30.0 30.4 30.9 31.2Strength (kips/ft) 0.505 0.488 0.473 0.459 0.447 0.435 0.425 0.416 0.408Stiffness, G' (kip/in) 29.4 30.3 31.2 32.0 32.7 33.4 34.1 34.7 35.3Strength (kips/ft) 0.576 0.559 0.544 0.530 0.518 0.506 0.496 0.487 0.479Stiffness, G' (kip/in) 31.0 32.1 33.1 34.1 35.0 35.8 36.6 37.4 38.1Strength (kips/ft) 0.718 0.701 0.686 0.672 0.660 0.648 0.638 0.629 0.621Stiffness, G' (kip/in) 33.2 34.5 35.7 36.8 38.0 39.0 40.0 41.0 42.0Strength (kips/ft) 0.860 0.843 0.828 0.814 0.802 0.790 0.780 0.771 0.763Stiffness, G' (kip/in) 34.5 35.9 37.3 38.6 39.9 41.1 42.2 43.3 44.4Strength (kips/ft) 1.10 1.08 1.07 1.06 1.04 1.03 1.02 1.02 1.01Stiffness, G' (kip/in) 36.1 37.7 39.2 40.7 42.1 43.5 44.8 46.1 47.3Strength (kips/ft) 0.748 0.712 0.681 0.652 0.627 0.604 0.583 0.564 0.546Stiffness, G' (kip/in) 30.0 30.8 31.5 32.2 32.8 33.4 33.9 34.4 34.8Strength (kips/ft) 0.819 0.783 0.752 0.723 0.698 0.675 0.654 0.635 0.617Stiffness, G' (kip/in) 31.4 32.4 33.4 34.2 35.0 35.8 36.5 37.2 37.8Strength (kips/ft) 0.890 0.854 0.823 0.794 0.769 0.746 0.725 0.706 0.688Stiffness, G' (kip/in) 32.6 33.7 34.8 35.8 36.7 37.6 38.5 39.3 40.0Strength (kips/ft) 1.032 0.996 0.965 0.936 0.911 0.888 0.867 0.847 0.830Stiffness, G' (kip/in) 34.1 35.4 36.7 37.9 39.0 40.1 41.2 42.2 43.1Strength (kips/ft) 1.173 1.138 1.107 1.078 1.053 1.030 1.009 0.989 0.972Stiffness, G' (kip/in) 35.2 36.6 38.0 39.3 40.6 41.8 43.0 44.1 45.2Strength (kips/ft) 1.418 1.386 1.357 1.331 1.307 1.286 1.266 1.248 1.232Stiffness, G' (kip/in) 36.5 38.1 39.6 41.1 42.5 43.9 45.2 46.5 47.7

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 126.86 6.08 5.42 4.86 4.39 3.98 3.63 3.32 3.05

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

32/3

36

24

18

12

9

6

32/5

36

24

18

12

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6

Span (ft)

32/7

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24

18

12

9

6

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______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

63

Design Thickness 0.0359 in.Support connection 3/4" Arc Spot WeldSide-lap connection #10 Screw

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.444 0.431 0.418 0.407 0.397 0.388 0.380 0.372 0.365Stiffness, G' (kip/in) 9.53 9.95 10.36 10.8 11.1 11.5 11.9 12.3 12.6Strength (kips/ft) 0.538 0.524 0.512 0.501 0.491 0.482 0.473 0.465 0.458Stiffness, G' (kip/in) 9.92 10.4 10.8 11.3 11.7 12.1 12.6 13.0 13.4Strength (kips/ft) 0.631 0.617 0.605 0.594 0.584 0.575 0.567 0.559 0.552Stiffness, G' (kip/in) 10.1 10.6 11.1 11.6 12.1 12.5 13.0 13.4 13.9Strength (kips/ft) 0.794 0.782 0.771 0.760 0.751 0.742 0.734 0.727 0.720Stiffness, G' (kip/in) 10.4 10.9 11.4 11.9 12.4 12.9 13.4 13.9 14.4Strength (kips/ft) 0.927 0.916 0.906 0.896 0.888 0.880 0.873 0.866 0.860Stiffness, G' (kip/in) 10.5 11.1 11.6 12.1 12.6 13.1 13.7 14.2 14.7Strength (kips/ft) 1.146 1.137 1.129 1.122 1.116 1.110 1.104 1.099 1.095Stiffness, G' (kip/in) 10.7 11.2 11.8 12.3 12.9 13.4 13.9 14.4 15.0Strength (kips/ft) 0.538 0.520 0.503 0.488 0.474 0.462 0.450 0.440 0.430Stiffness, G' (kip/in) 37.3 37.8 38.3 38.7 39.1 39.5 39.8 40.1 40.4Strength (kips/ft) 0.632 0.613 0.596 0.581 0.568 0.555 0.544 0.533 0.523Stiffness, G' (kip/in) 41.7 42.6 43.3 44.0 44.7 45.3 45.9 46.5 47.0Strength (kips/ft) 0.725 0.706 0.690 0.675 0.661 0.649 0.637 0.627 0.617Stiffness, G' (kip/in) 45.0 46.0 47.0 47.9 48.8 49.6 50.4 51.2 51.9Strength (kips/ft) 0.912 0.893 0.877 0.862 0.848 0.835 0.824 0.813 0.804Stiffness, G' (kip/in) 49.4 50.8 52.1 53.3 54.5 55.6 56.6 57.7 58.6Strength (kips/ft) 1.099 1.080 1.063 1.048 1.035 1.022 1.011 1.000 0.990Stiffness, G' (kip/in) 52.2 53.8 55.3 56.8 58.2 59.5 60.7 61.9 63.1Strength (kips/ft) 1.418 1.401 1.386 1.372 1.359 1.347 1.336 1.326 1.316Stiffness, G' (kip/in) 55.7 57.6 59.4 61.1 62.7 64.3 65.8 67.2 68.6Strength (kips/ft) 0.914 0.876 0.841 0.810 0.782 0.756 0.732 0.710 0.690Stiffness, G' (kip/in) 42.3 42.9 43.5 44.0 44.5 44.9 45.2 45.5 45.8Strength (kips/ft) 1.008 0.969 0.935 0.904 0.875 0.849 0.826 0.804 0.784Stiffness, G' (kip/in) 45.4 46.3 47.2 47.9 48.6 49.3 49.9 50.5 51.0Strength (kips/ft) 1.101 1.063 1.028 0.997 0.969 0.943 0.919 0.897 0.877Stiffness, G' (kip/in) 47.8 48.9 49.9 50.9 51.8 52.7 53.5 54.2 55.0Strength (kips/ft) 1.288 1.249 1.215 1.184 1.155 1.130 1.106 1.084 1.064Stiffness, G' (kip/in) 51.2 52.6 53.9 55.2 56.4 57.5 58.6 59.6 60.6Strength (kips/ft) 1.474 1.436 1.402 1.371 1.342 1.316 1.293 1.271 1.251Stiffness, G' (kip/in) 53.5 55.1 56.6 58.1 59.5 60.8 62.1 63.3 64.5Strength (kips/ft) 1.807 1.771 1.739 1.710 1.684 1.659 1.637 1.616 1.597Stiffness, G' (kip/in) 56.4 58.3 60.1 61.8 63.5 65.0 66.6 68.0 69.4

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.10 6.37 5.75 5.21 4.75 4.35 3.99 3.68 3.40

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

32/3

36

24

18

12

9

6

32/5

36

24

18

12

9

6

Span (ft)

32/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

64

Design Thickness 0.0478 in.Support connection 3/4" Arc Spot WeldSide-lap connection #10 Screw

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.577 0.564 0.551 0.540 0.529 0.519 0.510 0.502 0.494Stiffness, G' (kip/in) 18.6 19.2 19.8 20.4 20.9 21.5 22.0 22.5 23.0Strength (kips/ft) 0.721 0.707 0.695 0.683 0.673 0.663 0.654 0.646 0.638Stiffness, G' (kip/in) 20.0 20.7 21.4 22.1 22.8 23.4 24.1 24.7 25.3Strength (kips/ft) 0.864 0.851 0.838 0.827 0.816 0.806 0.797 0.789 0.781Stiffness, G' (kip/in) 20.8 21.6 22.4 23.2 23.9 24.6 25.4 26.1 26.7Strength (kips/ft) 1.094 1.082 1.071 1.060 1.050 1.042 1.033 1.026 1.018Stiffness, G' (kip/in) 21.8 22.7 23.5 24.4 25.2 26.1 26.9 27.7 28.5Strength (kips/ft) 1.288 1.278 1.268 1.259 1.250 1.243 1.235 1.229 1.223Stiffness, G' (kip/in) 22.3 23.3 24.2 25.1 26.0 26.9 27.8 28.6 29.5Strength (kips/ft) 1.596 1.589 1.582 1.575 1.569 1.563 1.558 1.553 1.549Stiffness, G' (kip/in) 22.9 23.9 24.9 25.9 26.8 27.8 28.7 29.6 30.5Strength (kips/ft) 0.688 0.669 0.652 0.636 0.621 0.608 0.596 0.584 0.574Stiffness, G' (kip/in) 54.5 54.7 54.9 55.0 55.1 55.2 55.3 55.4 55.5Strength (kips/ft) 0.832 0.813 0.795 0.779 0.765 0.751 0.739 0.728 0.717Stiffness, G' (kip/in) 63.6 64.1 64.7 65.2 65.6 66.0 66.4 66.7 67.1Strength (kips/ft) 0.975 0.956 0.939 0.923 0.908 0.895 0.883 0.871 0.861Stiffness, G' (kip/in) 70.6 71.5 72.3 73.1 73.8 74.4 75.1 75.6 76.2Strength (kips/ft) 1.262 1.243 1.226 1.210 1.195 1.182 1.170 1.158 1.148Stiffness, G' (kip/in) 80.8 82.1 83.4 84.6 85.7 86.8 87.8 88.7 89.6Strength (kips/ft) 1.537 1.518 1.500 1.484 1.469 1.456 1.443 1.431 1.421Stiffness, G' (kip/in) 87.8 89.5 91.1 92.6 94.0 95.4 96.7 97.9 99.1Strength (kips/ft) 2.005 1.988 1.972 1.958 1.944 1.932 1.921 1.910 1.901Stiffness, G' (kip/in) 96.8 99.0 101.0 103.0 104.8 106.6 108.3 109.9 111.4Strength (kips/ft) 1.131 1.091 1.055 1.021 0.991 0.962 0.936 0.912 0.890Stiffness, G' (kip/in) 63.9 64.1 64.2 64.3 64.4 64.4 64.4 64.4 64.4Strength (kips/ft) 1.275 1.235 1.198 1.165 1.134 1.106 1.080 1.056 1.034Stiffness, G' (kip/in) 70.9 71.4 72.0 72.4 72.8 73.2 73.5 73.8 74.1Strength (kips/ft) 1.418 1.378 1.342 1.308 1.278 1.249 1.223 1.199 1.177Stiffness, G' (kip/in) 76.4 77.3 78.1 78.9 79.6 80.2 80.8 81.3 81.8Strength (kips/ft) 1.705 1.665 1.629 1.595 1.565 1.536 1.510 1.486 1.464Stiffness, G' (kip/in) 84.7 86.1 87.4 88.6 89.7 90.7 91.7 92.6 93.5Strength (kips/ft) 1.985 1.946 1.910 1.878 1.848 1.820 1.795 1.771 1.749Stiffness, G' (kip/in) 90.6 92.4 94.0 95.5 96.9 98.3 99.5 100.8 101.9Strength (kips/ft) 2.483 2.447 2.413 2.383 2.355 2.329 2.305 2.282 2.261Stiffness, G' (kip/in) 98.5 100.7 102.7 104.7 106.6 108.3 110.0 111.6 113.1

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 148.83 8.01 7.29 6.67 6.13 5.65 5.22 4.84 4.50

32/3

36

24

12

9

6

18

Span (ft)

10 10.5 11 11.5 12 12.5 13 13.5 14

32/5

36

24

12

9

6

18

Span (ft)

32/7

36

24

12

9

6

18

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

65

Design Thickness 0.0598 in.Support connection 3/4" Arc Spot WeldSide-lap connection #10 Screw

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 0.713 0.700 0.687 0.676 0.665 0.655 0.646 0.638 0.630Stiffness, G' (kip/in) 29.7 30.4 31.1 31.7 32.3 32.9 33.5 34.0 34.5Strength (kips/ft) 0.914 0.900 0.888 0.876 0.866 0.856 0.847 0.839 0.831Stiffness, G' (kip/in) 33.0 33.9 34.8 35.6 36.5 37.3 38.0 38.8 39.5Strength (kips/ft) 1.108 1.095 1.082 1.071 1.060 1.050 1.041 1.032 1.024Stiffness, G' (kip/in) 35.1 36.2 37.2 38.2 39.2 40.1 41.1 41.9 42.8Strength (kips/ft) 1.412 1.400 1.389 1.379 1.370 1.361 1.353 1.345 1.338Stiffness, G' (kip/in) 37.7 39.0 40.2 41.4 42.5 43.7 44.8 45.9 46.9Strength (kips/ft) 1.670 1.660 1.651 1.643 1.635 1.627 1.621 1.614 1.608Stiffness, G' (kip/in) 39.2 40.6 41.9 43.2 44.5 45.8 47.0 48.2 49.4Strength (kips/ft) 2.065 2.058 2.052 2.046 2.041 2.036 2.031 2.027 2.023Stiffness, G' (kip/in) 40.9 42.4 43.9 45.3 46.7 48.1 49.5 50.8 52.2Strength (kips/ft) 0.837 0.818 0.801 0.785 0.770 0.756 0.744 0.732 0.721Stiffness, G' (kip/in) 68.6 68.6 68.5 68.4 68.3 68.2 68.1 68.0 67.9Strength (kips/ft) 1.038 1.019 1.001 0.985 0.971 0.957 0.944 0.933 0.922Stiffness, G' (kip/in) 82.7 83.0 83.2 83.4 83.6 83.8 84.0 84.1 84.3Strength (kips/ft) 1.238 1.220 1.202 1.186 1.171 1.158 1.145 1.133 1.122Stiffness, G' (kip/in) 94.0 94.6 95.2 95.7 96.1 96.6 97.0 97.3 97.7Strength (kips/ft) 1.640 1.621 1.604 1.588 1.573 1.559 1.547 1.535 1.524Stiffness, G' (kip/in) 111.3 112.4 113.4 114.4 115.3 116.1 116.9 117.7 118.4Strength (kips/ft) 2.000 1.981 1.964 1.948 1.933 1.920 1.907 1.895 1.884Stiffness, G' (kip/in) 123.7 125.2 126.6 128.0 129.2 130.4 131.5 132.6 133.6Strength (kips/ft) 2.635 2.619 2.604 2.590 2.577 2.565 2.554 2.544 2.534Stiffness, G' (kip/in) 140.5 142.6 144.6 146.4 148.2 149.9 151.5 153.0 154.4Strength (kips/ft) 1.332 1.292 1.255 1.220 1.189 1.160 1.133 1.108 1.084Stiffness, G' (kip/in) 82.0 81.8 81.5 81.2 80.9 80.5 80.2 79.9 79.6Strength (kips/ft) 1.533 1.492 1.455 1.421 1.390 1.361 1.334 1.308 1.285Stiffness, G' (kip/in) 93.5 93.6 93.7 93.8 93.9 93.9 93.9 93.9 93.9Strength (kips/ft) 1.734 1.693 1.656 1.622 1.591 1.561 1.534 1.509 1.486Stiffness, G' (kip/in) 103.0 103.4 103.9 104.3 104.6 104.9 105.2 105.5 105.7Strength (kips/ft) 2.135 2.095 2.058 2.024 1.992 1.963 1.936 1.911 1.887Stiffness, G' (kip/in) 117.6 118.7 119.6 120.5 121.4 122.1 122.9 123.5 124.2Strength (kips/ft) 2.512 2.473 2.437 2.404 2.373 2.345 2.318 2.294 2.271Stiffness, G' (kip/in) 128.5 129.9 131.3 132.6 133.8 134.9 136.0 137.0 138.0Strength (kips/ft) 3.201 3.165 3.131 3.101 3.072 3.046 3.021 2.998 2.977Stiffness, G' (kip/in) 143.5 145.5 147.5 149.3 151.1 152.7 154.3 155.8 157.2

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.2 9.32 8.56 7.89 7.29 6.76 6.29 5.86 5.48

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

32/3

36

24

18

12

9

6

32/5

36

24

18

12

9

6

Span (ft)

32/7

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

66

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.85 4.73 4.63 4.55 4.49 4.45 4.41 4.37 4.34Stiffness, G' (kip/in) 1989 1981 1974 1968 1964 1960 1956 1953 1950Strength (kips/ft) 4.87 4.74 4.65 4.57 4.51 4.46 4.42 4.39 4.36Stiffness, G' (kip/in) 1990 1982 1975 1970 1965 1961 1958 1955 1952Strength (kips/ft) 4.89 4.76 4.66 4.59 4.53 4.48 4.44 4.40 4.37Stiffness, G' (kip/in) 1991 1983 1977 1971 1967 1963 1960 1957 1954Strength (kips/ft) 4.92 4.79 4.70 4.62 4.56 4.51 4.47 4.44 4.41Stiffness, G' (kip/in) 1994 1986 1980 1974 1970 1966 1963 1960 1958Strength (kips/ft) 4.95 4.83 4.73 4.65 4.59 4.55 4.51 4.47 4.44Stiffness, G' (kip/in) 1996 1988 1982 1977 1973 1969 1966 1963 1961Strength (kips/ft) 5.02 4.89 4.80 4.72 4.66 4.61 4.57 4.54 4.51Stiffness, G' (kip/in) 2000 1993 1987 1983 1979 1975 1972 1970 1967Strength (kips/ft) 5.13 4.96 4.84 4.74 4.66 4.60 4.54 4.50 4.46Stiffness, G' (kip/in) 2002 1993 1986 1980 1974 1970 1966 1962 1959Strength (kips/ft) 5.15 4.98 4.86 4.76 4.68 4.61 4.56 4.52 4.48Stiffness, G' (kip/in) 2003 1994 1987 1981 1976 1971 1967 1964 1961Strength (kips/ft) 5.17 5.00 4.87 4.77 4.70 4.63 4.58 4.53 4.49Stiffness, G' (kip/in) 2004 1995 1988 1982 1977 1973 1969 1966 1963Strength (kips/ft) 5.20 5.03 4.91 4.81 4.73 4.66 4.61 4.57 4.53Stiffness, G' (kip/in) 2006 1998 1991 1985 1980 1976 1972 1969 1966Strength (kips/ft) 5.23 5.06 4.94 4.84 4.76 4.70 4.64 4.60 4.56Stiffness, G' (kip/in) 2008 2000 1993 1988 1983 1979 1975 1972 1969Strength (kips/ft) 5.30 5.13 5.01 4.91 4.83 4.76 4.71 4.67 4.63Stiffness, G' (kip/in) 2012 2004 1998 1992 1988 1984 1981 1978 1975Strength (kips/ft) 5.23 5.04 4.91 4.80 4.72 4.65 4.59 4.54 4.50Stiffness, G' (kip/in) 2013 2004 1996 1990 1984 1979 1975 1971 1967Strength (kips/ft) 5.24 5.06 4.93 4.82 4.73 4.67 4.61 4.56 4.52Stiffness, G' (kip/in) 2014 2005 1997 1991 1985 1980 1976 1972 1969Strength (kips/ft) 5.26 5.08 4.94 4.84 4.75 4.68 4.62 4.58 4.53Stiffness, G' (kip/in) 2015 2006 1998 1992 1987 1982 1978 1974 1970Strength (kips/ft) 5.29 5.11 4.98 4.87 4.78 4.72 4.66 4.61 4.57Stiffness, G' (kip/in) 2017 2008 2001 1994 1989 1984 1980 1977 1973Strength (kips/ft) 5.33 5.14 5.01 4.90 4.82 4.75 4.69 4.64 4.60Stiffness, G' (kip/in) 2018 2010 2003 1997 1991 1987 1983 1979 1976Strength (kips/ft) 5.39 5.21 5.08 4.97 4.88 4.82 4.76 4.71 4.67Stiffness, G' (kip/in) 2022 2014 2007 2001 1996 1992 1988 1985 1982Strength (kips/ft) 6.06 5.76 5.54 5.36 5.22 5.11 5.01 4.93 4.86Stiffness, G' (kip/in) 2039 2029 2021 2014 2007 2002 1997 1992 1988Strength (kips/ft) 6.08 5.78 5.55 5.38 5.24 5.12 5.03 4.95 4.88Stiffness, G' (kip/in) 2039 2030 2022 2015 2008 2003 1998 1993 1989Strength (kips/ft) 6.10 5.80 5.57 5.39 5.25 5.14 5.04 4.96 4.89Stiffness, G' (kip/in) 2040 2031 2023 2016 2009 2004 1999 1995 1991Strength (kips/ft) 6.13 5.83 5.60 5.43 5.29 5.17 5.08 5.00 4.93Stiffness, G' (kip/in) 2041 2032 2024 2017 2011 2006 2001 1997 1993Strength (kips/ft) 6.16 5.86 5.64 5.46 5.32 5.21 5.11 5.03 4.96Stiffness, G' (kip/in) 2042 2033 2026 2019 2013 2008 2003 1999 1995Strength (kips/ft) 6.23 5.93 5.70 5.53 5.39 5.27 5.18 5.10 5.03Stiffness, G' (kip/in) 2044 2036 2029 2022 2017 2012 2007 2003 2000

Nominal Shear Strength due to Panel Buckling (kips/ft)

3 3.5 4 4.5 5 0.5 6 6.5 715.0 11.0 8.45 6.68 5.41 4.47 3.76 3.20 2.76

Span (ft)

3 3.5 4 4.5 5 0.5 6 6.5 7

36/4

36

24

18

12

9

6

36/5

36

24

18

12

9

6

36/7

36

24

18

12

9

6

Span (ft)

36/9

36

24

18

12

9

6

______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

67

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.87 4.77 4.69 4.62 4.57 4.52 4.48 4.44 4.41Stiffness, G' (kip/in) 1983 1976 1971 1966 1962 1959 1956 1953 1951Strength (kips/ft) 4.89 4.79 4.71 4.64 4.58 4.54 4.50 4.46 4.43Stiffness, G' (kip/in) 1985 1978 1973 1968 1964 1961 1958 1955 1953Strength (kips/ft) 4.91 4.80 4.72 4.66 4.60 4.55 4.51 4.48 4.45Stiffness, G' (kip/in) 1986 1980 1975 1970 1966 1963 1960 1957 1955Strength (kips/ft) 4.94 4.84 4.76 4.69 4.63 4.59 4.55 4.51 4.48Stiffness, G' (kip/in) 1989 1983 1978 1974 1970 1967 1964 1962 1959Strength (kips/ft) 4.97 4.87 4.79 4.72 4.67 4.62 4.58 4.54 4.51Stiffness, G' (kip/in) 1993 1987 1982 1978 1974 1971 1968 1966 1963Strength (kips/ft) 5.04 4.94 4.86 4.79 4.73 4.69 4.65 4.61 4.58Stiffness, G' (kip/in) 1999 1993 1988 1984 1981 1978 1975 1973 1971Strength (kips/ft) 5.15 5.02 4.91 4.83 4.75 4.69 4.64 4.60 4.56Stiffness, G' (kip/in) 1997 1990 1983 1978 1974 1970 1966 1963 1960Strength (kips/ft) 5.17 5.04 4.93 4.84 4.77 4.71 4.66 4.61 4.57Stiffness, G' (kip/in) 1998 1991 1985 1980 1975 1971 1968 1965 1962Strength (kips/ft) 5.19 5.05 4.95 4.86 4.79 4.73 4.67 4.63 4.59Stiffness, G' (kip/in) 2000 1993 1987 1982 1977 1973 1970 1967 1964Strength (kips/ft) 5.22 5.09 4.98 4.89 4.82 4.76 4.71 4.66 4.62Stiffness, G' (kip/in) 2002 1996 1990 1985 1981 1977 1974 1971 1968Strength (kips/ft) 5.25 5.12 5.01 4.93 4.85 4.79 4.74 4.70 4.66Stiffness, G' (kip/in) 2005 1999 1993 1988 1984 1980 1977 1974 1972Strength (kips/ft) 5.32 5.19 5.08 4.99 4.92 4.86 4.81 4.76 4.72Stiffness, G' (kip/in) 2011 2004 1999 1995 1991 1987 1984 1981 1979Strength (kips/ft) 5.25 5.10 4.99 4.90 4.82 4.75 4.69 4.65 4.60Stiffness, G' (kip/in) 2009 2001 1995 1989 1984 1979 1975 1972 1969Strength (kips/ft) 5.26 5.12 5.01 4.91 4.83 4.77 4.71 4.66 4.62Stiffness, G' (kip/in) 2010 2003 1996 1990 1985 1981 1977 1974 1971Strength (kips/ft) 5.28 5.14 5.02 4.93 4.85 4.78 4.73 4.68 4.64Stiffness, G' (kip/in) 2011 2004 1998 1992 1987 1983 1979 1975 1972Strength (kips/ft) 5.31 5.17 5.06 4.96 4.88 4.82 4.76 4.71 4.67Stiffness, G' (kip/in) 2014 2007 2000 1995 1990 1986 1982 1979 1976Strength (kips/ft) 5.35 5.20 5.09 5.00 4.92 4.85 4.79 4.75 4.70Stiffness, G' (kip/in) 2016 2009 2003 1998 1993 1989 1986 1982 1980Strength (kips/ft) 5.41 5.27 5.16 5.06 4.98 4.92 4.86 4.81 4.77Stiffness, G' (kip/in) 2021 2014 2009 2004 1999 1996 1992 1989 1986Strength (kips/ft) 6.09 5.86 5.67 5.51 5.38 5.27 5.18 5.10 5.03Stiffness, G' (kip/in) 2038 2030 2022 2015 2010 2004 1999 1995 1991Strength (kips/ft) 6.11 5.87 5.68 5.53 5.40 5.29 5.19 5.11 5.04Stiffness, G' (kip/in) 2039 2031 2023 2017 2011 2006 2001 1997 1993Strength (kips/ft) 6.13 5.89 5.70 5.54 5.41 5.31 5.21 5.13 5.06Stiffness, G' (kip/in) 2040 2032 2024 2018 2012 2007 2002 1998 1994Strength (kips/ft) 6.16 5.92 5.73 5.58 5.45 5.34 5.24 5.16 5.09Stiffness, G' (kip/in) 2042 2034 2027 2020 2015 2010 2005 2001 1997Strength (kips/ft) 6.19 5.96 5.77 5.61 5.48 5.37 5.28 5.20 5.13Stiffness, G' (kip/in) 2044 2036 2029 2023 2017 2012 2008 2004 2000Strength (kips/ft) 6.26 6.02 5.83 5.68 5.55 5.44 5.34 5.26 5.19Stiffness, G' (kip/in) 2047 2039 2033 2027 2022 2017 2013 2009 2006

Nominal Shear Strength due to Panel Buckling (kips/ft)

4 4.5 5 5.5 6 6.5 7 7.5 811.47 9.060 7.339 6.065 5.096 4.343 3.744 3.262 2.867

Span (ft)

4 4.5 5 5.5 6 6.5 7 7.5 8

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______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

68

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.92 4.83 4.76 4.70 4.65 4.60 4.56 4.52 4.49Stiffness, G' (kip/in) 1984 1979 1974 1970 1966 1963 1960 1957 1955Strength (kips/ft) 4.94 4.85 4.78 4.72 4.66 4.62 4.58 4.54 4.51Stiffness, G' (kip/in) 1987 1981 1976 1972 1968 1965 1962 1960 1957Strength (kips/ft) 4.95 4.87 4.79 4.73 4.68 4.63 4.59 4.56 4.53Stiffness, G' (kip/in) 1989 1983 1979 1975 1971 1968 1965 1962 1960Strength (kips/ft) 4.99 4.90 4.83 4.77 4.71 4.67 4.63 4.59 4.56Stiffness, G' (kip/in) 1993 1988 1983 1979 1976 1973 1970 1967 1965Strength (kips/ft) 5.02 4.93 4.86 4.80 4.75 4.70 4.66 4.62 4.59Stiffness, G' (kip/in) 1998 1992 1988 1984 1981 1978 1975 1972 1970Strength (kips/ft) 5.09 5.00 4.93 4.87 4.81 4.77 4.73 4.69 4.66Stiffness, G' (kip/in) 2006 2001 1997 1993 1990 1987 1984 1982 1980Strength (kips/ft) 5.22 5.10 5.01 4.93 4.86 4.80 4.74 4.70 4.66Stiffness, G' (kip/in) 2000 1993 1987 1982 1978 1974 1971 1968 1965Strength (kips/ft) 5.23 5.12 5.02 4.94 4.87 4.81 4.76 4.71 4.67Stiffness, G' (kip/in) 2002 1995 1990 1985 1981 1977 1973 1970 1967Strength (kips/ft) 5.25 5.14 5.04 4.96 4.89 4.83 4.78 4.73 4.69Stiffness, G' (kip/in) 2004 1997 1992 1987 1983 1979 1976 1973 1970Strength (kips/ft) 5.28 5.17 5.07 4.99 4.92 4.86 4.81 4.76 4.72Stiffness, G' (kip/in) 2008 2002 1996 1992 1987 1984 1981 1978 1975Strength (kips/ft) 5.32 5.20 5.11 5.03 4.96 4.90 4.84 4.80 4.76Stiffness, G' (kip/in) 2012 2006 2000 1996 1992 1988 1985 1982 1980Strength (kips/ft) 5.38 5.27 5.17 5.09 5.02 4.96 4.91 4.86 4.82Stiffness, G' (kip/in) 2019 2013 2009 2004 2000 1997 1994 1991 1989Strength (kips/ft) 5.32 5.19 5.09 5.00 4.93 4.86 4.81 4.76 4.71Stiffness, G' (kip/in) 2013 2006 2000 1994 1990 1985 1981 1978 1975Strength (kips/ft) 5.33 5.21 5.11 5.02 4.94 4.88 4.82 4.77 4.73Stiffness, G' (kip/in) 2015 2008 2002 1997 1992 1988 1984 1980 1977Strength (kips/ft) 5.35 5.23 5.12 5.04 4.96 4.90 4.84 4.79 4.74Stiffness, G' (kip/in) 2017 2010 2004 1999 1994 1990 1986 1983 1979Strength (kips/ft) 5.38 5.26 5.16 5.07 4.99 4.93 4.87 4.82 4.78Stiffness, G' (kip/in) 2021 2014 2008 2003 1998 1994 1990 1987 1984Strength (kips/ft) 5.42 5.29 5.19 5.10 5.03 4.96 4.91 4.86 4.81Stiffness, G' (kip/in) 2024 2018 2012 2007 2002 1998 1995 1992 1989Strength (kips/ft) 5.48 5.36 5.26 5.17 5.09 5.03 4.97 4.92 4.88Stiffness, G' (kip/in) 2031 2025 2019 2015 2010 2007 2003 2000 1997Strength (kips/ft) 6.20 6.00 5.83 5.68 5.56 5.45 5.36 5.28 5.20Stiffness, G' (kip/in) 2048 2040 2032 2026 2020 2014 2009 2005 2001Strength (kips/ft) 6.22 6.01 5.84 5.70 5.58 5.47 5.38 5.29 5.22Stiffness, G' (kip/in) 2050 2041 2034 2027 2021 2016 2011 2007 2003Strength (kips/ft) 6.23 6.03 5.86 5.72 5.59 5.49 5.39 5.31 5.24Stiffness, G' (kip/in) 2051 2043 2036 2029 2023 2018 2013 2009 2005Strength (kips/ft) 6.27 6.06 5.89 5.75 5.63 5.52 5.43 5.34 5.27Stiffness, G' (kip/in) 2054 2046 2039 2032 2027 2022 2017 2013 2009Strength (kips/ft) 6.30 6.10 5.93 5.78 5.66 5.55 5.46 5.38 5.30Stiffness, G' (kip/in) 2057 2049 2042 2036 2030 2025 2021 2016 2013Strength (kips/ft) 6.37 6.16 5.99 5.85 5.73 5.62 5.53 5.44 5.37Stiffness, G' (kip/in) 2062 2055 2048 2042 2037 2032 2028 2024 2020

Nominal Shear Strength due to Panel Buckling (kips/ft)

5 5.5 6 6.5 7 7.5 8 8.5 911.5 9.53 8.01 6.83 5.89 5.13 4.51 3.99 3.56

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Span (ft)

5 5.5 6 6.5 7 7.5 8 8.5 9

36/5

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______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

69

Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.95 4.87 4.81 4.75 4.70 4.66 4.62 4.58 4.55Stiffness, G' (kip/in) 1984 1979 1975 1971 1967 1964 1962 1959 1957Strength (kips/ft) 4.97 4.89 4.82 4.77 4.72 4.67 4.63 4.60 4.57Stiffness, G' (kip/in) 1987 1982 1978 1974 1971 1968 1965 1962 1960Strength (kips/ft) 4.98 4.91 4.84 4.78 4.73 4.69 4.65 4.62 4.59Stiffness, G' (kip/in) 1990 1985 1981 1977 1974 1971 1968 1966 1963Strength (kips/ft) 5.02 4.94 4.87 4.82 4.77 4.72 4.68 4.65 4.62Stiffness, G' (kip/in) 1995 1990 1986 1983 1979 1977 1974 1972 1970Strength (kips/ft) 5.05 4.97 4.91 4.85 4.80 4.76 4.72 4.68 4.65Stiffness, G' (kip/in) 2000 1996 1992 1988 1985 1982 1980 1978 1976Strength (kips/ft) 5.12 5.04 4.97 4.92 4.87 4.82 4.78 4.75 4.72Stiffness, G' (kip/in) 2011 2006 2003 1999 1996 1994 1991 1989 1987Strength (kips/ft) 5.25 5.15 5.07 4.99 4.93 4.87 4.82 4.77 4.73Stiffness, G' (kip/in) 2000 1994 1989 1984 1980 1977 1974 1971 1968Strength (kips/ft) 5.27 5.17 5.08 5.01 4.94 4.89 4.84 4.79 4.75Stiffness, G' (kip/in) 2002 1997 1992 1987 1983 1980 1977 1974 1971Strength (kips/ft) 5.29 5.19 5.10 5.03 4.96 4.90 4.85 4.81 4.77Stiffness, G' (kip/in) 2005 1999 1994 1990 1986 1983 1980 1977 1974Strength (kips/ft) 5.32 5.22 5.13 5.06 4.99 4.94 4.89 4.84 4.80Stiffness, G' (kip/in) 2010 2005 2000 1996 1992 1988 1985 1982 1980Strength (kips/ft) 5.35 5.25 5.17 5.09 5.03 4.97 4.92 4.87 4.83Stiffness, G' (kip/in) 2015 2010 2005 2001 1997 1994 1991 1988 1986Strength (kips/ft) 5.42 5.32 5.23 5.16 5.09 5.04 4.99 4.94 4.90Stiffness, G' (kip/in) 2025 2020 2015 2011 2008 2004 2002 1999 1997Strength (kips/ft) 5.35 5.25 5.15 5.07 5.00 4.94 4.89 4.84 4.79Stiffness, G' (kip/in) 2015 2008 2002 1997 1993 1989 1985 1981 1978Strength (kips/ft) 5.37 5.26 5.17 5.09 5.02 4.96 4.90 4.86 4.81Stiffness, G' (kip/in) 2017 2011 2005 2000 1995 1991 1988 1984 1981Strength (kips/ft) 5.39 5.28 5.19 5.11 5.04 4.98 4.92 4.87 4.83Stiffness, G' (kip/in) 2019 2013 2008 2003 1998 1994 1990 1987 1984Strength (kips/ft) 5.42 5.31 5.22 5.14 5.07 5.01 4.95 4.91 4.86Stiffness, G' (kip/in) 2024 2018 2013 2008 2003 1999 1996 1993 1990Strength (kips/ft) 5.45 5.35 5.25 5.17 5.10 5.04 4.99 4.94 4.89Stiffness, G' (kip/in) 2029 2023 2017 2013 2009 2005 2001 1998 1995Strength (kips/ft) 5.52 5.41 5.32 5.24 5.17 5.11 5.05 5.01 4.96Stiffness, G' (kip/in) 2038 2032 2027 2022 2018 2015 2011 2009 2006Strength (kips/ft) 6.26 6.08 5.93 5.80 5.68 5.58 5.49 5.41 5.34Stiffness, G' (kip/in) 2053 2045 2038 2031 2026 2020 2015 2011 2007Strength (kips/ft) 6.28 6.10 5.95 5.82 5.70 5.60 5.51 5.43 5.36Stiffness, G' (kip/in) 2055 2047 2040 2034 2028 2023 2018 2013 2009Strength (kips/ft) 6.29 6.12 5.96 5.83 5.72 5.62 5.53 5.45 5.37Stiffness, G' (kip/in) 2057 2049 2042 2036 2030 2025 2020 2016 2012Strength (kips/ft) 6.33 6.15 6.00 5.87 5.75 5.65 5.56 5.48 5.41Stiffness, G' (kip/in) 2061 2053 2046 2040 2035 2030 2025 2021 2017Strength (kips/ft) 6.36 6.18 6.03 5.90 5.78 5.68 5.59 5.51 5.44Stiffness, G' (kip/in) 2065 2057 2050 2044 2039 2034 2030 2025 2022Strength (kips/ft) 6.43 6.25 6.10 5.97 5.85 5.75 5.66 5.58 5.51Stiffness, G' (kip/in) 2072 2065 2058 2053 2047 2043 2038 2034 2031

Nominal Shear Strength due to Panel Buckling (kips/ft)

6 6.5 7 7.5 8 8.5 9 9.5 1011.2 9.52 8.21 7.15 6.29 5.57 4.97 4.46 4.02

Span (ft)

6 6.5 7 7.5 8 8.5 9 9.5 10

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______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

70

Design Thickness 0.0299 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.26 4.24 4.22 4.21 4.20 4.19 4.18 4.17 4.16Stiffness, G' (kip/in) 1925 1924 1923 1922 1922 1921 1920 1920 1919Strength (kips/ft) 4.27 4.26 4.24 4.23 4.21 4.20 4.19 4.18 4.17Stiffness, G' (kip/in) 1927 1926 1925 1924 1923 1922 1922 1921 1921Strength (kips/ft) 4.29 4.27 4.26 4.24 4.23 4.22 4.21 4.20 4.19Stiffness, G' (kip/in) 1927 1926 1925 1924 1923 1922 1922 1921 1921Strength (kips/ft) 4.32 4.31 4.29 4.28 4.26 4.25 4.24 4.23 4.22Stiffness, G' (kip/in) 1931 1930 1929 1928 1928 1927 1926 1926 1925Strength (kips/ft) 4.36 4.34 4.32 4.31 4.30 4.29 4.28 4.27 4.26Stiffness, G' (kip/in) 1934 1933 1932 1931 1930 1930 1929 1929 1928Strength (kips/ft) 4.42 4.41 4.39 4.38 4.36 4.35 4.34 4.33 4.32Stiffness, G' (kip/in) 1939 1938 1937 1936 1936 1935 1934 1934 1933Strength (kips/ft) 4.34 4.31 4.29 4.28 4.26 4.25 4.23 4.22 4.21Stiffness, G' (kip/in) 1934 1933 1932 1930 1929 1928 1927 1926 1926Strength (kips/ft) 4.35 4.33 4.31 4.29 4.28 4.26 4.25 4.24 4.23Stiffness, G' (kip/in) 1936 1934 1933 1932 1931 1930 1929 1928 1927Strength (kips/ft) 4.37 4.35 4.33 4.31 4.29 4.28 4.27 4.25 4.24Stiffness, G' (kip/in) 1936 1934 1933 1932 1931 1930 1929 1928 1927Strength (kips/ft) 4.40 4.38 4.36 4.34 4.33 4.31 4.30 4.29 4.28Stiffness, G' (kip/in) 1939 1938 1937 1936 1935 1934 1933 1932 1931Strength (kips/ft) 4.44 4.41 4.39 4.38 4.36 4.35 4.33 4.32 4.31Stiffness, G' (kip/in) 1942 1940 1939 1938 1937 1936 1935 1935 1934Strength (kips/ft) 4.50 4.48 4.46 4.44 4.43 4.41 4.40 4.39 4.38Stiffness, G' (kip/in) 1946 1945 1944 1943 1942 1941 1940 1940 1939Strength (kips/ft) 4.65 4.61 4.57 4.54 4.51 4.49 4.46 4.44 4.42Stiffness, G' (kip/in) 1949 1947 1946 1944 1942 1941 1940 1938 1937Strength (kips/ft) 4.67 4.63 4.59 4.56 4.53 4.50 4.48 4.46 4.44Stiffness, G' (kip/in) 1950 1949 1947 1945 1944 1942 1941 1940 1939Strength (kips/ft) 4.68 4.64 4.61 4.57 4.55 4.52 4.49 4.47 4.45Stiffness, G' (kip/in) 1950 1949 1947 1945 1944 1942 1941 1940 1939Strength (kips/ft) 4.72 4.68 4.64 4.61 4.58 4.55 4.53 4.51 4.49Stiffness, G' (kip/in) 1953 1952 1950 1948 1947 1946 1944 1943 1942Strength (kips/ft) 4.75 4.71 4.67 4.64 4.61 4.59 4.56 4.54 4.52Stiffness, G' (kip/in) 1955 1954 1952 1950 1949 1948 1947 1945 1944Strength (kips/ft) 4.82 4.78 4.74 4.71 4.68 4.65 4.63 4.61 4.59Stiffness, G' (kip/in) 1959 1957 1956 1954 1953 1952 1951 1950 1949

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 127.12 6.30 5.62 5.05 4.56 4.13 3.76 3.44 3.16

Span (ft)

8 8.5 9 9.5 10 10.5 11 11.5 12

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______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

71

Design Thickness 0.0359 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.32 4.30 4.29 4.27 4.26 4.24 4.23 4.22 4.21Stiffness, G' (kip/in) 1926 1925 1924 1923 1922 1922 1921 1920 1920Strength (kips/ft) 4.34 4.32 4.30 4.29 4.27 4.26 4.25 4.24 4.23Stiffness, G' (kip/in) 1927 1926 1926 1925 1924 1923 1923 1922 1922Strength (kips/ft) 4.36 4.34 4.32 4.30 4.29 4.28 4.26 4.25 4.24Stiffness, G' (kip/in) 1927 1926 1926 1925 1924 1923 1923 1922 1922Strength (kips/ft) 4.39 4.37 4.35 4.34 4.32 4.31 4.30 4.29 4.28Stiffness, G' (kip/in) 1932 1931 1930 1930 1929 1928 1928 1927 1927Strength (kips/ft) 4.42 4.40 4.39 4.37 4.36 4.34 4.33 4.32 4.31Stiffness, G' (kip/in) 1935 1934 1934 1933 1932 1932 1931 1930 1930Strength (kips/ft) 4.49 4.47 4.45 4.44 4.42 4.41 4.40 4.39 4.38Stiffness, G' (kip/in) 1941 1940 1939 1939 1938 1938 1937 1937 1936Strength (kips/ft) 4.42 4.39 4.37 4.35 4.33 4.32 4.30 4.29 4.27Stiffness, G' (kip/in) 1935 1934 1932 1931 1930 1929 1928 1927 1927Strength (kips/ft) 4.43 4.41 4.39 4.37 4.35 4.33 4.32 4.30 4.29Stiffness, G' (kip/in) 1936 1935 1934 1933 1932 1931 1930 1929 1928Strength (kips/ft) 4.45 4.42 4.40 4.38 4.37 4.35 4.33 4.32 4.31Stiffness, G' (kip/in) 1936 1935 1934 1933 1932 1931 1930 1929 1928Strength (kips/ft) 4.48 4.46 4.44 4.42 4.40 4.38 4.37 4.35 4.34Stiffness, G' (kip/in) 1941 1939 1938 1937 1936 1935 1935 1934 1933Strength (kips/ft) 4.52 4.49 4.47 4.45 4.43 4.42 4.40 4.39 4.37Stiffness, G' (kip/in) 1944 1942 1941 1940 1939 1938 1938 1937 1936Strength (kips/ft) 4.58 4.56 4.54 4.52 4.50 4.48 4.47 4.45 4.44Stiffness, G' (kip/in) 1949 1948 1947 1946 1945 1944 1943 1943 1942Strength (kips/ft) 4.79 4.75 4.71 4.67 4.64 4.61 4.58 4.56 4.53Stiffness, G' (kip/in) 1951 1949 1947 1946 1944 1943 1941 1940 1939Strength (kips/ft) 4.81 4.76 4.72 4.69 4.66 4.63 4.60 4.57 4.55Stiffness, G' (kip/in) 1952 1950 1949 1947 1945 1944 1943 1942 1941Strength (kips/ft) 4.82 4.78 4.74 4.71 4.67 4.64 4.62 4.59 4.57Stiffness, G' (kip/in) 1952 1950 1949 1947 1945 1944 1943 1942 1941Strength (kips/ft) 4.86 4.81 4.77 4.74 4.71 4.68 4.65 4.62 4.60Stiffness, G' (kip/in) 1956 1954 1952 1951 1949 1948 1947 1946 1945Strength (kips/ft) 4.89 4.85 4.81 4.77 4.74 4.71 4.68 4.66 4.63Stiffness, G' (kip/in) 1958 1956 1955 1953 1952 1951 1950 1948 1947Strength (kips/ft) 4.96 4.91 4.87 4.84 4.81 4.78 4.75 4.72 4.70Stiffness, G' (kip/in) 1963 1961 1959 1958 1957 1956 1955 1953 1953

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.39 6.64 5.99 5.43 4.95 4.53 4.16 3.83 3.54

Span (ft)

9 9.5 10 10.5 11 11.5 12 12.5 13

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24/7

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______________________________________________________________________________________________________Canadian Sheet Steel Building Institute

______________________________________________________________________________________________________ CSSBI B13-2019: Design of Steel Deck Diaphragms

72

Design Thickness 0.0478 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.39 4.37 4.35 4.33 4.32 4.30 4.29 4.28 4.27Stiffness, G' (kip/in) 1928 1927 1926 1925 1924 1924 1923 1922 1922Strength (kips/ft) 4.41 4.39 4.37 4.35 4.33 4.32 4.31 4.29 4.28Stiffness, G' (kip/in) 1930 1929 1928 1927 1926 1926 1925 1924 1924Strength (kips/ft) 4.42 4.40 4.38 4.37 4.35 4.34 4.32 4.31 4.30Stiffness, G' (kip/in) 1930 1929 1928 1927 1926 1926 1925 1924 1924Strength (kips/ft) 4.46 4.44 4.42 4.40 4.38 4.37 4.36 4.34 4.33Stiffness, G' (kip/in) 1935 1935 1934 1933 1932 1932 1931 1931 1930Strength (kips/ft) 4.49 4.47 4.45 4.43 4.42 4.40 4.39 4.38 4.37Stiffness, G' (kip/in) 1939 1938 1938 1937 1936 1935 1935 1934 1934Strength (kips/ft) 4.56 4.54 4.52 4.50 4.48 4.47 4.46 4.44 4.43Stiffness, G' (kip/in) 1946 1946 1945 1944 1943 1943 1942 1942 1941Strength (kips/ft) 4.50 4.47 4.45 4.43 4.41 4.39 4.38 4.36 4.35Stiffness, G' (kip/in) 1938 1936 1935 1934 1933 1932 1931 1930 1929Strength (kips/ft) 4.52 4.49 4.47 4.45 4.43 4.41 4.39 4.38 4.36Stiffness, G' (kip/in) 1940 1938 1937 1936 1935 1934 1933 1932 1931Strength (kips/ft) 4.53 4.51 4.48 4.46 4.44 4.43 4.41 4.39 4.38Stiffness, G' (kip/in) 1940 1938 1937 1936 1935 1934 1933 1932 1931Strength (kips/ft) 4.57 4.54 4.52 4.50 4.48 4.46 4.44 4.43 4.41Stiffness, G' (kip/in) 1945 1944 1943 1941 1940 1940 1939 1938 1937Strength (kips/ft) 4.60 4.57 4.55 4.53 4.51 4.49 4.48 4.46 4.45Stiffness, G' (kip/in) 1948 1947 1946 1945 1944 1943 1942 1942 1941Strength (kips/ft) 4.67 4.64 4.62 4.60 4.58 4.56 4.54 4.53 4.51Stiffness, G' (kip/in) 1955 1954 1953 1952 1951 1950 1949 1949 1948Strength (kips/ft) 4.94 4.90 4.85 4.81 4.78 4.75 4.72 4.69 4.66Stiffness, G' (kip/in) 1956 1954 1952 1950 1949 1947 1946 1945 1943Strength (kips/ft) 4.96 4.91 4.87 4.83 4.80 4.76 4.73 4.70 4.68Stiffness, G' (kip/in) 1957 1955 1954 1952 1950 1949 1948 1946 1945Strength (kips/ft) 4.98 4.93 4.89 4.85 4.81 4.78 4.75 4.72 4.70Stiffness, G' (kip/in) 1957 1955 1954 1952 1950 1949 1948 1946 1945Strength (kips/ft) 5.01 4.96 4.92 4.88 4.85 4.81 4.78 4.75 4.73Stiffness, G' (kip/in) 1962 1960 1958 1957 1955 1954 1953 1952 1950Strength (kips/ft) 5.04 5.00 4.95 4.91 4.88 4.85 4.82 4.79 4.76Stiffness, G' (kip/in) 1965 1963 1962 1960 1959 1957 1956 1955 1954Strength (kips/ft) 5.11 5.06 5.02 4.98 4.95 4.91 4.88 4.85 4.83Stiffness, G' (kip/in) 1971 1969 1968 1966 1965 1963 1962 1961 1960

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 149.18 8.33 7.59 6.94 6.37 5.87 5.43 5.04 4.68

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Design Thickness 0.0598 in.Support connection 3/4" arc spot weldsSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.44 4.42 4.40 4.38 4.37 4.35 4.34 4.33 4.31Stiffness, G' (kip/in) 1929 1928 1927 1926 1926 1925 1924 1924 1923Strength (kips/ft) 4.46 4.44 4.42 4.40 4.38 4.37 4.36 4.34 4.33Stiffness, G' (kip/in) 1931 1930 1930 1929 1928 1927 1927 1926 1926Strength (kips/ft) 4.48 4.46 4.44 4.42 4.40 4.39 4.37 4.36 4.35Stiffness, G' (kip/in) 1931 1930 1930 1929 1928 1927 1927 1926 1926Strength (kips/ft) 4.51 4.49 4.47 4.45 4.43 4.42 4.41 4.39 4.38Stiffness, G' (kip/in) 1938 1937 1936 1936 1935 1934 1934 1933 1933Strength (kips/ft) 4.54 4.52 4.50 4.48 4.47 4.45 4.44 4.43 4.41Stiffness, G' (kip/in) 1942 1941 1941 1940 1939 1939 1938 1938 1937Strength (kips/ft) 4.61 4.59 4.57 4.55 4.53 4.52 4.51 4.49 4.48Stiffness, G' (kip/in) 1951 1950 1949 1948 1948 1947 1947 1946 1946Strength (kips/ft) 4.57 4.54 4.52 4.49 4.47 4.45 4.44 4.42 4.40Stiffness, G' (kip/in) 1940 1938 1937 1936 1935 1934 1933 1932 1931Strength (kips/ft) 4.58 4.56 4.53 4.51 4.49 4.47 4.45 4.44 4.42Stiffness, G' (kip/in) 1942 1940 1939 1938 1937 1936 1935 1935 1934Strength (kips/ft) 4.60 4.57 4.55 4.53 4.51 4.49 4.47 4.45 4.44Stiffness, G' (kip/in) 1942 1940 1939 1938 1937 1936 1935 1935 1934Strength (kips/ft) 4.63 4.61 4.58 4.56 4.54 4.52 4.50 4.49 4.47Stiffness, G' (kip/in) 1948 1947 1946 1945 1944 1943 1942 1941 1940Strength (kips/ft) 4.67 4.64 4.62 4.59 4.57 4.55 4.54 4.52 4.50Stiffness, G' (kip/in) 1952 1951 1950 1949 1948 1947 1946 1945 1945Strength (kips/ft) 4.73 4.71 4.68 4.66 4.64 4.62 4.60 4.59 4.57Stiffness, G' (kip/in) 1960 1959 1958 1957 1956 1955 1954 1954 1953Strength (kips/ft) 5.06 5.01 4.97 4.93 4.89 4.86 4.83 4.80 4.77Stiffness, G' (kip/in) 1959 1957 1955 1954 1952 1951 1949 1948 1947Strength (kips/ft) 5.08 5.03 4.99 4.95 4.91 4.87 4.84 4.81 4.78Stiffness, G' (kip/in) 1961 1959 1957 1956 1954 1953 1951 1950 1949Strength (kips/ft) 5.10 5.05 5.00 4.96 4.93 4.89 4.86 4.83 4.80Stiffness, G' (kip/in) 1961 1959 1957 1956 1954 1953 1951 1950 1949Strength (kips/ft) 5.13 5.08 5.04 5.00 4.96 4.92 4.89 4.86 4.83Stiffness, G' (kip/in) 1967 1965 1963 1961 1960 1958 1957 1956 1955Strength (kips/ft) 5.16 5.11 5.07 5.03 4.99 4.96 4.93 4.90 4.87Stiffness, G' (kip/in) 1970 1968 1967 1965 1964 1962 1961 1960 1959Strength (kips/ft) 5.23 5.18 5.14 5.10 5.06 5.02 4.99 4.96 4.93Stiffness, G' (kip/in) 1977 1975 1974 1972 1971 1970 1968 1967 1966

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.6 9.69 8.90 8.20 7.58 7.03 6.54 6.09 5.69

Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

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Design Thickness 0.0299 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.26 4.24 4.22 4.21 4.20 4.19 4.18 4.17 4.16Stiffness, G' (kip/in) 1904 1904 1904 1904 1904 1904 1904 1904 1903Strength (kips/ft) 4.27 4.26 4.24 4.23 4.21 4.20 4.19 4.18 4.17Stiffness, G' (kip/in) 1933 1931 1930 1929 1928 1927 1926 1925 1925Strength (kips/ft) 4.29 4.27 4.26 4.24 4.23 4.22 4.21 4.20 4.19Stiffness, G' (kip/in) 1934 1933 1932 1931 1930 1929 1928 1927 1927Strength (kips/ft) 4.32 4.31 4.29 4.28 4.26 4.25 4.24 4.23 4.22Stiffness, G' (kip/in) 1936 1935 1934 1933 1932 1931 1930 1929 1929Strength (kips/ft) 4.36 4.34 4.32 4.31 4.30 4.29 4.28 4.27 4.26Stiffness, G' (kip/in) 1940 1938 1937 1936 1935 1935 1934 1933 1932Strength (kips/ft) 4.42 4.41 4.39 4.38 4.36 4.35 4.34 4.33 4.32Stiffness, G' (kip/in) 1943 1942 1941 1940 1939 1938 1937 1937 1936Strength (kips/ft) 4.34 4.31 4.29 4.28 4.26 4.25 4.23 4.22 4.21Stiffness, G' (kip/in) 1904 1904 1904 1904 1904 1904 1904 1904 1903Strength (kips/ft) 4.35 4.33 4.31 4.29 4.28 4.26 4.25 4.24 4.23Stiffness, G' (kip/in) 1944 1942 1940 1939 1938 1936 1935 1934 1933Strength (kips/ft) 4.37 4.35 4.33 4.31 4.29 4.28 4.27 4.25 4.24Stiffness, G' (kip/in) 1945 1944 1942 1941 1939 1938 1937 1936 1935Strength (kips/ft) 4.40 4.38 4.36 4.34 4.33 4.31 4.30 4.29 4.28Stiffness, G' (kip/in) 1947 1945 1944 1942 1941 1940 1939 1938 1937Strength (kips/ft) 4.44 4.41 4.39 4.38 4.36 4.35 4.33 4.32 4.31Stiffness, G' (kip/in) 1950 1948 1947 1945 1944 1943 1942 1941 1940Strength (kips/ft) 4.50 4.48 4.46 4.44 4.43 4.41 4.40 4.39 4.38Stiffness, G' (kip/in) 1953 1951 1950 1949 1947 1946 1945 1944 1943Strength (kips/ft) 4.65 4.61 4.57 4.54 4.51 4.49 4.46 4.44 4.42Stiffness, G' (kip/in) 1904 1904 1904 1904 1904 1904 1904 1904 1903Strength (kips/ft) 4.67 4.63 4.59 4.56 4.53 4.50 4.48 4.46 4.44Stiffness, G' (kip/in) 1963 1960 1958 1956 1954 1952 1951 1949 1948Strength (kips/ft) 4.68 4.64 4.61 4.57 4.55 4.52 4.49 4.47 4.45Stiffness, G' (kip/in) 1964 1961 1959 1957 1955 1954 1952 1951 1949Strength (kips/ft) 4.72 4.68 4.64 4.61 4.58 4.55 4.53 4.51 4.49Stiffness, G' (kip/in) 1965 1963 1961 1959 1957 1955 1954 1952 1951Strength (kips/ft) 4.75 4.71 4.67 4.64 4.61 4.59 4.56 4.54 4.52Stiffness, G' (kip/in) 1967 1965 1963 1961 1959 1958 1956 1955 1954Strength (kips/ft) 4.82 4.78 4.74 4.71 4.68 4.65 4.63 4.61 4.59Stiffness, G' (kip/in) 1970 1968 1966 1964 1962 1960 1959 1958 1956

Nominal Shear Strength due to Panel Buckling (kips/ft)

8 8.5 9 9.5 10 10.5 11 11.5 126.86 6.08 5.42 4.86 4.39 3.98 3.63 3.32 3.05

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8 8.5 9 9.5 10 10.5 11 11.5 12

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Design Thickness 0.0359 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.32 4.30 4.29 4.27 4.26 4.24 4.23 4.22 4.21Stiffness, G' (kip/in) 1905 1904 1904 1904 1904 1904 1904 1904 1904Strength (kips/ft) 4.34 4.32 4.30 4.29 4.27 4.26 4.25 4.24 4.23Stiffness, G' (kip/in) 1933 1932 1931 1930 1929 1928 1927 1926 1926Strength (kips/ft) 4.36 4.34 4.32 4.30 4.29 4.28 4.26 4.25 4.24Stiffness, G' (kip/in) 1935 1934 1933 1932 1931 1930 1929 1929 1928Strength (kips/ft) 4.39 4.37 4.35 4.34 4.32 4.31 4.30 4.29 4.28Stiffness, G' (kip/in) 1937 1936 1935 1934 1933 1932 1932 1931 1930Strength (kips/ft) 4.42 4.40 4.39 4.37 4.36 4.34 4.33 4.32 4.31Stiffness, G' (kip/in) 1941 1940 1939 1938 1937 1937 1936 1935 1934Strength (kips/ft) 4.49 4.47 4.45 4.44 4.42 4.41 4.40 4.39 4.38Stiffness, G' (kip/in) 1945 1944 1943 1942 1941 1941 1940 1939 1939Strength (kips/ft) 4.42 4.39 4.37 4.35 4.33 4.32 4.30 4.29 4.27Stiffness, G' (kip/in) 1905 1904 1904 1904 1904 1904 1904 1904 1904Strength (kips/ft) 4.43 4.41 4.39 4.37 4.35 4.33 4.32 4.30 4.29Stiffness, G' (kip/in) 1945 1943 1942 1940 1939 1938 1936 1935 1934Strength (kips/ft) 4.45 4.42 4.40 4.38 4.37 4.35 4.33 4.32 4.31Stiffness, G' (kip/in) 1947 1945 1944 1942 1941 1940 1939 1938 1937Strength (kips/ft) 4.48 4.46 4.44 4.42 4.40 4.38 4.37 4.35 4.34Stiffness, G' (kip/in) 1949 1947 1945 1944 1943 1942 1941 1940 1939Strength (kips/ft) 4.52 4.49 4.47 4.45 4.43 4.42 4.40 4.39 4.37Stiffness, G' (kip/in) 1952 1951 1949 1948 1947 1946 1944 1944 1943Strength (kips/ft) 4.58 4.56 4.54 4.52 4.50 4.48 4.47 4.45 4.44Stiffness, G' (kip/in) 1956 1954 1953 1951 1950 1949 1948 1947 1946Strength (kips/ft) 4.79 4.75 4.71 4.67 4.64 4.61 4.58 4.56 4.53Stiffness, G' (kip/in) 1905 1904 1904 1904 1904 1904 1904 1904 1904Strength (kips/ft) 4.81 4.76 4.72 4.69 4.66 4.63 4.60 4.57 4.55Stiffness, G' (kip/in) 1965 1962 1960 1958 1956 1955 1953 1952 1950Strength (kips/ft) 4.82 4.78 4.74 4.71 4.67 4.64 4.62 4.59 4.57Stiffness, G' (kip/in) 1966 1964 1962 1960 1958 1956 1955 1953 1952Strength (kips/ft) 4.86 4.81 4.77 4.74 4.71 4.68 4.65 4.62 4.60Stiffness, G' (kip/in) 1968 1966 1964 1962 1960 1958 1957 1955 1954Strength (kips/ft) 4.89 4.85 4.81 4.77 4.74 4.71 4.68 4.66 4.63Stiffness, G' (kip/in) 1971 1969 1967 1965 1963 1961 1960 1958 1957Strength (kips/ft) 4.96 4.91 4.87 4.84 4.81 4.78 4.75 4.72 4.70Stiffness, G' (kip/in) 1974 1972 1970 1968 1966 1965 1963 1962 1960

Nominal Shear Strength due to Panel Buckling (kips/ft)

9 9.5 10 10.5 11 11.5 12 12.5 137.10 6.37 5.75 5.21 4.75 4.35 3.99 3.68 3.40

Span (ft)

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9 9.5 10 10.5 11 11.5 12 12.5 13

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Design Thickness 0.0478 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.39 4.37 4.35 4.33 4.32 4.30 4.29 4.28 4.27Stiffness, G' (kip/in) 1905 1905 1905 1905 1905 1905 1904 1904 1904Strength (kips/ft) 4.41 4.39 4.37 4.35 4.33 4.32 4.31 4.29 4.28Stiffness, G' (kip/in) 1936 1935 1933 1932 1931 1931 1930 1929 1928Strength (kips/ft) 4.42 4.40 4.38 4.37 4.35 4.34 4.32 4.31 4.30Stiffness, G' (kip/in) 1938 1937 1936 1935 1934 1933 1932 1932 1931Strength (kips/ft) 4.46 4.44 4.42 4.40 4.38 4.37 4.36 4.34 4.33Stiffness, G' (kip/in) 1941 1940 1939 1938 1937 1936 1935 1934 1934Strength (kips/ft) 4.49 4.47 4.45 4.43 4.42 4.40 4.39 4.38 4.37Stiffness, G' (kip/in) 1946 1945 1944 1943 1942 1941 1940 1940 1939Strength (kips/ft) 4.56 4.54 4.52 4.50 4.48 4.47 4.46 4.44 4.43Stiffness, G' (kip/in) 1951 1950 1948 1948 1947 1946 1945 1944 1944Strength (kips/ft) 4.50 4.47 4.45 4.43 4.41 4.39 4.38 4.36 4.35Stiffness, G' (kip/in) 1905 1905 1905 1905 1905 1905 1904 1904 1904Strength (kips/ft) 4.52 4.49 4.47 4.45 4.43 4.41 4.39 4.38 4.36Stiffness, G' (kip/in) 1949 1947 1945 1944 1943 1941 1940 1939 1938Strength (kips/ft) 4.53 4.51 4.48 4.46 4.44 4.43 4.41 4.39 4.38Stiffness, G' (kip/in) 1951 1949 1948 1946 1945 1944 1943 1942 1941Strength (kips/ft) 4.57 4.54 4.52 4.50 4.48 4.46 4.44 4.43 4.41Stiffness, G' (kip/in) 1953 1952 1950 1949 1948 1946 1945 1944 1943Strength (kips/ft) 4.60 4.57 4.55 4.53 4.51 4.49 4.48 4.46 4.45Stiffness, G' (kip/in) 1958 1956 1955 1954 1952 1951 1950 1949 1948Strength (kips/ft) 4.67 4.64 4.62 4.60 4.58 4.56 4.54 4.53 4.51Stiffness, G' (kip/in) 1962 1961 1959 1958 1957 1956 1955 1954 1953Strength (kips/ft) 4.94 4.90 4.85 4.81 4.78 4.75 4.72 4.69 4.66Stiffness, G' (kip/in) 1905 1905 1905 1905 1905 1905 1904 1904 1904Strength (kips/ft) 4.96 4.91 4.87 4.83 4.80 4.76 4.73 4.70 4.68Stiffness, G' (kip/in) 1972 1969 1967 1965 1963 1961 1959 1958 1956Strength (kips/ft) 4.98 4.93 4.89 4.85 4.81 4.78 4.75 4.72 4.70Stiffness, G' (kip/in) 1974 1971 1969 1967 1965 1963 1961 1960 1958Strength (kips/ft) 5.01 4.96 4.92 4.88 4.85 4.81 4.78 4.75 4.73Stiffness, G' (kip/in) 1976 1973 1971 1969 1967 1965 1964 1962 1961Strength (kips/ft) 5.04 5.00 4.95 4.91 4.88 4.85 4.82 4.79 4.76Stiffness, G' (kip/in) 1979 1977 1975 1973 1971 1969 1968 1966 1965Strength (kips/ft) 5.11 5.06 5.02 4.98 4.95 4.91 4.88 4.85 4.83Stiffness, G' (kip/in) 1983 1981 1979 1977 1975 1973 1972 1970 1969

Nominal Shear Strength due to Panel Buckling (kips/ft)

10 10.5 11 11.5 12 12.5 13 13.5 148.8 8.0 7.3 6.7 6.1 5.6 5.2 4.8 4.5

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10 10.5 11 11.5 12 12.5 13 13.5 14

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Design Thickness 0.0598 in.Support connection 3/4" Arc Spot WeldSide-lap connection Button PunchConcrete density 145 pcf minimumConcrete strength 3000 psi minimum

Nominal Shear Strength and StiffnessSupport Side Lap

Connection SpacingPattern (in.)

Strength (kips/ft) 4.44 4.42 4.40 4.38 4.37 4.35 4.34 4.33 4.31Stiffness, G' (kip/in) 1906 1906 1905 1905 1905 1905 1905 1905 1905Strength (kips/ft) 4.46 4.44 4.42 4.40 4.38 4.37 4.36 4.34 4.33Stiffness, G' (kip/in) 1938 1936 1935 1934 1933 1933 1932 1931 1930Strength (kips/ft) 4.48 4.46 4.44 4.42 4.40 4.39 4.37 4.36 4.35Stiffness, G' (kip/in) 1941 1939 1938 1937 1936 1936 1935 1934 1933Strength (kips/ft) 4.51 4.49 4.47 4.45 4.43 4.42 4.41 4.39 4.38Stiffness, G' (kip/in) 1944 1942 1941 1940 1939 1939 1938 1937 1936Strength (kips/ft) 4.54 4.52 4.50 4.48 4.47 4.45 4.44 4.43 4.41Stiffness, G' (kip/in) 1949 1948 1947 1946 1945 1945 1944 1943 1942Strength (kips/ft) 4.61 4.59 4.57 4.55 4.53 4.52 4.51 4.49 4.48Stiffness, G' (kip/in) 1955 1954 1953 1952 1951 1950 1950 1949 1948Strength (kips/ft) 4.57 4.54 4.52 4.49 4.47 4.45 4.44 4.42 4.40Stiffness, G' (kip/in) 1906 1906 1905 1905 1905 1905 1905 1905 1905Strength (kips/ft) 4.58 4.56 4.53 4.51 4.49 4.47 4.45 4.44 4.42Stiffness, G' (kip/in) 1951 1950 1948 1947 1945 1944 1943 1942 1941Strength (kips/ft) 4.60 4.57 4.55 4.53 4.51 4.49 4.47 4.45 4.44Stiffness, G' (kip/in) 1954 1953 1951 1950 1948 1947 1946 1945 1944Strength (kips/ft) 4.63 4.61 4.58 4.56 4.54 4.52 4.50 4.49 4.47Stiffness, G' (kip/in) 1957 1955 1954 1952 1951 1950 1949 1948 1947Strength (kips/ft) 4.67 4.64 4.62 4.59 4.57 4.55 4.54 4.52 4.50Stiffness, G' (kip/in) 1962 1961 1959 1958 1957 1955 1954 1953 1952Strength (kips/ft) 4.73 4.71 4.68 4.66 4.64 4.62 4.60 4.59 4.57Stiffness, G' (kip/in) 1967 1966 1965 1963 1962 1961 1960 1959 1958Strength (kips/ft) 5.06 5.01 4.97 4.93 4.89 4.86 4.83 4.80 4.77Stiffness, G' (kip/in) 1906 1906 1905 1905 1905 1905 1905 1905 1905Strength (kips/ft) 5.08 5.03 4.99 4.95 4.91 4.87 4.84 4.81 4.78Stiffness, G' (kip/in) 1976 1974 1971 1969 1967 1965 1964 1962 1960Strength (kips/ft) 5.10 5.05 5.00 4.96 4.93 4.89 4.86 4.83 4.80Stiffness, G' (kip/in) 1979 1976 1974 1972 1970 1968 1966 1965 1963Strength (kips/ft) 5.13 5.08 5.04 5.00 4.96 4.92 4.89 4.86 4.83Stiffness, G' (kip/in) 1981 1979 1976 1974 1972 1970 1969 1967 1966Strength (kips/ft) 5.16 5.11 5.07 5.03 4.99 4.96 4.93 4.90 4.87Stiffness, G' (kip/in) 1986 1983 1981 1979 1977 1975 1974 1972 1971Strength (kips/ft) 5.23 5.18 5.14 5.10 5.06 5.02 4.99 4.96 4.93Stiffness, G' (kip/in) 1990 1988 1986 1984 1982 1980 1979 1977 1976

Nominal Shear Strength due to Panel Buckling (kips/ft)

11 11.5 12 12.5 13 13.5 14 14.5 1510.2 9.32 8.56 7.89 7.29 6.76 6.29 5.86 5.48

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Span (ft)

11 11.5 12 12.5 13 13.5 14 14.5 15

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