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AOstructures Inc. <br />PO Box 413 <br />Carnelian Bay, CA 96140 <br />916.541.8586 <br />www.AOstructures.com <br />Input Variables <br />Demand Uplift (Punching Shear) =500.0 lb (See Wind Calcs) <br />Purlin/Joist Spacing =24.0 in <br />Plywood Span Rating =24/0 (Assumed) <br />Plywood Thickness = 15/32 (Assumed) <br />Standoff Diameter =7.00 in <br />Punching Shear Demand = 500.0 lb <br />Fv * tv = (Per APA Table 9 - See Below) <br />Cd = 1.6 (Per APA Table 6) <br />(Fv * tv) * Cd = <br />Allowed Shear (punching) = = (Fv * tv) * Cd * Standoff diameter <br />Demand / Capacity Ratio = 65% <br />Results: 772.8 lb capacity > 500 lb demand Therefore, OK <br />APA Design Capacity Tables <br />Plywood Punching Shear Capacity Check <br />Plywood Shear Capacity Check <br />69.0 lbf/in <br />110.4 lbf/in <br />772.8 lb <br />Plywood Decking Check.xlsx 2