Allowable Shear of Wood Panel Diaphragms

[tngolfer]

Does anyone know of allowable shear values for wood diaphragms with panel thicknesses greater than 19/32"? The architect is asking for a 1" structural panel for the subflooring.

Ideally I would like a continuation of 2003 IBC Table 2306.3.1 (NDS Structural Panel Supplement Table 3.1B)

TIA

 

[MiketheEngineer]

You could use the 19/32 values if the nail/screw embedment is met - I would think. Or use two 1/2'' panels - one over the other. Then you could definitely use the 1/2'' values.

You might look to APAwood.org for some help...

 

[KBVT]

The diaphragm capacities are dependent on the sheathing thickness AND the nail size. If you use a 1" sheathing thickness with the nails indicated in the design tables, you still only get credit for the capacities listed with the lesser sheathing thickness and the applicable nails.

 

[tngolfer]

KBVT, I can show that it can support the applied shear load through NDS Table 11N. If I use a 10d common nail (D=0.148" and L=3") my nail penetration, p, into the main member is 13.5D. NDS says p=10D is sufficient to reach 100% of the allowable shear load for the nail. According to Table 11N (plus applicable adjustment factors), my shear capacity will exceed my applied load but I was just curious if anyone knew of an extension of that table. I am also curious how the blocked/unblocked factors in.