2001 ASD Supplements - unprotected PDF - American Wood Council

ASD WOOD STRUCTURAL PANEL SHEAR WALL AND DIAPHRAGM SUPPLEMENTSW-174.3 Shear Wall DeflectionThe deflection (∆) of a blocked shear wall uniformlynailed throughout may be estimated by use of the followingformula:E = elastic modulus of boundary element (verticalmember at shear wall boundary), psie n= nail deformation (see Table 3.2), in.38vh vh h∆= + + 0.75hen+ d aEAb Gt bwhere:A = area of boundary element cross section(vertical member at shear wall boundary), in. 2b = wall width, ft.d a= deflection due to vertical anchoragedeformation (rotation and slip at tie-downbolts), in.G = modulus of rigidity of wood structural panel(see Wood Structural Panel Supplement), psih = wall height, ft.t = effective panel thickness for shear (see WoodStructural Panels Supplement), in.v = maximum shear due to design loads at the topof the wall, plf∆ = the calculated deflection, in.4SHEAR WALLSAPA – The Engineered Wood Association