huangyhg

allowable shear of wood panel diaphragms
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
check out our whitepaper library.
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...
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.
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.

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