By American Wood Council
Wind and Seismic layout advisor, published to be used with 2005 NDS wooden layout package deal.
Read or Download ASD/LRFD Wind & Seismic, Special Design Provisions For Wind And Seismic, With Commentary PDF
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Additional info for ASD/LRFD Wind & Seismic, Special Design Provisions For Wind And Seismic, With Commentary
3B. Nails shall be spaced not less than 3/8" from edges and ends of panels. Wood framing shall be 2" nominal or wider. 6 Shear Walls Diagonally Sheathed with Double-Layer of Lumber: Double diagonally sheathed lumber shear walls are permitted to be used to resist wind forces and seismic forces in Seismic Design Categories A, B, C, and D. Double diagonally sheathed lumber shear walls shall be constructed of two layers of 1" thick nominal diagonal sheathing boards laid perpendicular to each other on the same face of the supporting members.
C. c. c. field (applied vertically). c. c. field (applied vertically). c. c. c. field (applied vertically). c. c. field (blocked). For other stud depths, the wall stud bending stress increase factor was assumed to be proportional to the relative stiffness (EI) of the stud material. 1 are due to rounding. 2 assume a two-span continuous condition. Out-of-plane sheathing capacities are often tabulated in other documents on the basis of a three-span continuous condition. Although the three-span continuous condition results in higher capacity, the more conservative two-span continuous condition was selected because this condition frequently exists at building end zones where the largest wind forces occur.
Examination of other design conditions verified a reasonable range of reliability indices would be achieved by application of ASTM D 5457 (16) resistance American Forest & paper association COMMENTARY: GENERAL DESIGN REQUIREMENTS Both ASD and LRFD (also referred to as strength design) formats are addressed by reference to the National Design Specification (NDS) for Wood Construction (6) for 38 SDPWS COMMENTARY: general DESIGN requirements factors. Because the target reliability index was selected based on historically acceptable design practice, there is virtually no difference between ASD and LRFD designs at the reference design condition.
ASD/LRFD Wind & Seismic, Special Design Provisions For Wind And Seismic, With Commentary by American Wood Council