One-Hour Combustible Load-Bearing Wall Assemblies

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• APA Rated Siding Exterior, 5/8" Type X gypsum sheathing


• Stucco (over self-furring metal lath), APA Rated Sheathing Exposure 1 plywood or OSB


• APA Rated Siding Exterior or other exterior finish (code-recognized type), 5/8" Type X gypsum sheathing, Min. 15/32"APA Rated Sheathing Exposure 1 OSB or plywood


• APA Rated Siding Exterior or other exterior finish (code-recognized type), 5/8" Type X gypsum sheathing, Min. 7/16" APA Rated Sheathing Exposure 1 OSB or plywood


• Min. 3/8" APA Rated Siding Exterior plywood


• Min. ½: APA Rated Siding Exterior plywood, 1" Rigid foam insulation sheathing; Exterior finish-elastomeric coating, 1" Rigid foam insulation sheathing, Min. ½" APA Rated Sheathing Exposure 1 plywood


• Load-Bearing Interior (Chase) Wall System


• One-Hour Load-Bearing Interior Wall System, 2x4 studs @ 16" o.c.


• One-Hour Load-Bearing Wall System


• One-Hour Load-Bearing Interior Wall System, 2x6 studs @ 16" o.c.


• One-Hour Load-Bearing Exterior Wall System

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Because APA has no control over quality of workmanship or the conditions under which engineered wood products are used, it cannot accept responsibility of product performance or designs as actually constructed. Consult your local jurisdiction or design professional to assure compliance with code, construction, and performance requirements.

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