2001 ASD Supplements - unprotected PDF - American Wood Council

SW-32APPENDICESb. Wall to Diaphragm Connection:Diaphragm Design Unit Shear:V wind N-S= 280 lb./ft. for East and West WallsVseismic E-W= 79 lb./ft. for North and South WallsEast and West Walls - Hem-fir 2x blocking to Douglas fir-Larch 2x top plates (in a more complete design example itwas determined that Douglas fir-Larch top plates were required to resist chord forces):V 16d Common toenail= 113 lb. x 0.83 x 1.6 = 150 lb./fastenerLoad Duration FactorToenail Factor (C tn) per NDSNDS Table 11N for t s= 1", Hem-fir280 lb./ft. ÷ 150 lb./fastener = 1.9 fasteners/ft. ∴ Provide 16d common toenails spaced 6" o.c. or use appropriate code-approvedmetal framing devices.North and South Walls - Hem-fir 2x blocking to Hem-fir 2x top plates:V 16d Common toenail= 113 lb. x 0.83 x 1.6 = 150 lb./fastenerLoad Duration FactorToenail Factor (C tn) per NDSNDS Table 11N for t s= 1"79 lb./ft. ÷ 150 lb./fastener = 0.5 fasteners/ft. ∴ Provide 16d common toenails spaced no greater than 24" o.c.Wall to Diaphragm Connection DetailParapet bracing (not designed here)Diaphragm boundary nailingToenail to transfer in-plane shearWall anchorageAPA – The Engineered Wood Association