(a) For framing of other species: (1) Fins specific gravity for species of lumber in the AFPA National Design Specification. (2) (a) For common or galvanized box nails, find shear value from table above for nail size for STRUCTURAL I panels (regardless of actual grade). (b) for galvanized casing nails, take shear value directly form table anove.(3) Multiply this value by 0.82 for species with specific gravity of 0.42 or greater, or 0.65 for all other species. See footnote (h).

(b) All panel edges backed with 2-inch nominal or wider framing. Install panels either horizontally or vertically. Space nail maximum 6 inches o.c. along intermediate framing members for 3/8-inch and 7/16-inch panels installed on studs spaced 24 inches o.c. For other conditions and panels thickness, space nails maximum 12 inches o.c. on intermediate supports. Fasteners shall be located a minimum 3/8 inch from panels edges.

(c) 3/8-inch or APA RAGED SIDING 16oc is minimum recommended when applied direct tot framing as exterior siding.

(d) Shears may be increased to values shown for 15/32-inch sheathing with same nailing provided (1) studs are spaced a maximum of 16 inches o.c., or (2) if panels are applied with long dimensions across studs.

(e) Framing at adjoining panel edges shall be 3-inch nominal or wider, and nails shall be staggered where 10d nails having penetration into framing of more than 1-5/8 inches are spaced 3 inches o.c. Check local code for variations of these requirements

(g) Values apply it all-veneer plywood APA RATED SIDING panels only, Other APA RATED SIDING panels may also qualify on a proprietary basis. APA RATED SIDING 16 oc plywood may be 11/32 inch, 3/8 inch or thicker. Thickness at point of nailing on panels edges governs shear values.

(h) Contact APA for engineered alternatives.