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The tables below provide the shear capacities for each material factored for ASD by 1/2.0 for wind design and 1/2.8 for seismic design, as per SDPWS 4.1.4, along with trhe unfactored capacities listed in SDPWS Table 4.3A.
Refer also to the Design Factors that apply to these capacities in various circumstances.
The sheathing capacities appear in the Shear Design table of the Design Results. For a perforated wall or segmented wall without openings, the sheathing capacity shown is factored with the Design Factors shown. For a segmented or FTAO wall with openings, the value shown for walls does not include the Aspect ratio factor, but the value for segments does, as the aspect ration factor can be different for different segments.
Fully factored sheathing capacity for the critical segment on a wall is also shown in Elevation view.
Wood Structural Panels - Structural I |
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Shearwalls |
SDPWS Table 4.3A |
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Panel Thick. |
Nail Size |
Panel Edge Nail Spacing |
Panel Edge Nail Spacing |
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6 |
4 |
3 |
2 |
6 |
4 |
3 |
2 |
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Wind |
Seis |
Wind |
Seis |
Wind |
Seis |
Wind |
Seis |
Unfactored by ASD Factor |
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5/16 |
6d |
280 |
200 |
420 |
300 |
545 |
389.3 |
715 |
510.7 |
560 |
840 |
1090 |
1430 |
|
3/8 |
8d |
322.5 |
230.4 |
505 |
360.7 |
645 |
460.7 |
855 |
610.7 |
645 |
1010 |
1290 |
1710 |
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7/16 |
8d |
357.5 |
255.4 |
552.5 |
394.6 |
707.5 |
505.4 |
937.5 |
669.6 |
715 |
1105 |
1415 |
1875 |
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15/32 |
8d |
392.5 |
280.4 |
602.5 |
430.4 |
770 |
550 |
1022.5 |
730.4 |
785 |
1205 |
1540 |
2045 |
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15/32 |
10d |
475 |
339.3 |
715 |
510.7 |
930 |
664.3 |
1217.5 |
869.6 |
950 |
1430 |
1860 |
2435 |
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Wood Structural Panels - Structural Sheathing |
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Shearwalls |
SDPWS Table 4.3A |
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Panel Thick. |
Nail Size |
Panel Edge Nail Spacing |
Panel Edge Nail Spacing |
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6 |
4 |
3 |
2 |
6 |
4 |
3 |
2 |
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Wind |
Seis |
Wind |
Seis |
Wind |
Seis |
Wind |
Seis |
Unfactored by ASD Factor |
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5/16 |
6d |
252.5 |
180.4 |
377.5 |
269.6 |
490 |
350 |
630 |
450 |
505 |
755 |
980 |
1260 |
|
3/8 |
6d |
280 |
200 |
420 |
300 |
545 |
389.3 |
715 |
510.7 |
560 |
840 |
1090 |
1430 |
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3/8 |
8d |
307.5 |
219.6 |
447.5 |
319.6 |
575 |
410.7 |
742.5 |
530.4 |
615 |
895 |
1150 |
1485 |
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7/16 |
8d |
335 |
239.3 |
490 |
350 |
630 |
450 |
820 |
585.7 |
670 |
980 |
1260 |
1640 |
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15/32 |
8d |
365 |
260.7 |
532.5 |
380.4 |
685 |
489.3 |
895 |
639.3 |
730 |
1065 |
1370 |
1790 |
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15/32 |
10d |
435 |
310.7 |
645 |
460.7 |
840 |
600 |
1077.5 |
769.6 |
870 |
1290 |
1680 |
2155 |
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19/32 |
10d |
475 |
339.3 |
715 |
510.7 |
930 |
664.3 |
1217.5 |
869.6 |
950 |
1430 |
1860 |
2435 |
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Plywood Siding |
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Shearwalls |
SDPWS Table 4.3A |
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Panel Thick. |
Nail Size |
Panel Edge Nail Spacing |
Panel Edge Nail Spacing |
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6 |
4 |
3 |
2 |
6 |
4 |
3 |
2 |
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Wind |
Seis |
Wind |
Seis |
Wind |
Seis |
Wind |
Seis |
Unfactored by ASD Factor |
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5/16 |
6d |
195 |
139.3 |
295 |
210.7 |
385 |
275 |
505 |
360.7 |
390 |
590 |
770 |
1010 |
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3/8 |
8d |
225 |
160.7 |
335 |
239.3 |
435 |
310.7 |
575 |
410.7 |
450 |
670 |
870 |
1150 |
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Fiberboard |
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Shearwalls |
SDPWS Table 4.3A |
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Panel Edge Nail Spacing |
Panel Edge Nail Spacing |
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4" |
3" |
2" |
4" |
3" |
2" |
For wind design |
237.5 |
322.5 |
365 |
475 |
645 |
730 |
For seismic design |
169.6 |
230.4 |
260.7 |
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Same capacity for both sheathing thicknesses. |
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Gypsum Wallboard |
Shearwalls |
SDPWS Table 4.3C |
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Thick. |
Fastener |
Spacing |
Studs |
Wind |
Seismic |
Unfactored by ASD Factor |
½” |
nail |
7" |
24" |
75 |
53.6 |
150 |
½” |
nail |
4" |
24" |
110 |
78.6 |
220 |
½” |
nail |
7" |
16" unblk |
100 |
71.4 |
200 |
½” |
nail |
4" |
16" unblk |
125 |
89.3 |
250 |
½” |
nail |
7" |
16" block |
125 |
89.3 |
250 |
½” |
nail |
4" |
16" block |
150 |
107.1 |
300 |
5/8" |
nail |
7" |
24" or unblock |
115 |
82.1 |
230 |
5/8" |
nail |
4" |
24" or unblock |
145 |
103.6 |
290 |
5/8” |
nail |
7" |
16' block |
145 |
103.6 |
290 |
5/8” |
nail |
4" |
16" block |
175 |
125 |
350 |
5/8” 2-ply |
nail |
7" / 9" |
16" block |
250 |
178.6 |
500 |
½” |
screw |
8"/12" |
16" unblk |
60 |
42.9 |
120 |
½” |
screw |
8"/12" |
16" block |
70 |
50 |
140 |
½” |
screw |
6"/12" |
16" block |
90 |
64.3 |
180 |
½” |
screw |
4"/12" |
24" block |
155 |
110.7 |
310 |
½” |
screw |
4" /16" |
16" block |
160 |
114.3 |
320 |
5/8” |
screw |
8"/12" |
16" unblk |
70 |
50 |
140 |
5/8” |
screw |
8"/12" |
16" block |
90 |
64.3 |
180 |
Gypsum Sheathing Board |
Shearwalls |
SDPWS Table 4.3C |
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Wind |
Seismic |
Divide by 2.0 (wind) 2.8 (seismic) |
½” x 2’ |
75 |
53.6 |
150 |
½” x 4’ blocked |
175 |
125 |
350 |
½” x 4’ unblocked |
100 |
71.4 |
200 |
5/8” x 4’ |
200 |
142.9 |
400 |
Gypsum Lath and Plaster |
Shearwalls |
SDPWS Table 4.3C |
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Wind |
Seismic |
Divide by 2.0 (wind) 2.8 (seismic) |
Vertical Joints Staggered |
180 |
128.6 |
360 |
Vertical Joints not staggered |
100 |
71.4 |
200 |
Wire Lath and Plaster |
Shearwalls |
SDPWS Table 4.3C |
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|
Wind |
Seismic |
Divide by 2.0 (wind) 2.8 (seismic) |
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180 |
128.6 |
360 |
Lumber Siding |
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Shearwalls |
SDPWS Table 4.3D |
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Sheathing Orientation |
Wind |
Seismic |
Unfactored for ASD |
Horizontal |
70 |
50 |
140 |
Single diagonal |
420 |
300 |
840 |
Double Diagonal |
840 |
600 |
1680 |
Vertical |
62.5 |
44.6 |
125 |