WIND & SEISMIC - AWC
4 geneRal design RequiRements. 2.1 General . 2.1.1 Scope . The provisions of this document cover materials, design and construction of wood members, fasteners, and assemblies to resist wind and seismic forces. 2.1.2 Design Methods . Engineered design of wood structures to resist wind and seismic forces shall be by one of the methods de-
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www.awc.orgmay provide equal, or possibly, improved performance. These, however, must provide performance assurance ac-ceptable to the owner and the building inspector. Dimensioning. In general, dimensions for framing lumber, wood sid-ing and trim referenced in this document are nominal dimensions; i.e., 2x4, 2x6, etc., for simplicity. Actual sur-
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www.awc.org3. Maximum allowable overhang cannot exceed L/4 or ¼ of actual main span. Assumes cantilever length/180 deflection with 220 lb point load (See Figure 1A and Figure 2). 4. Incising assumed for Douglas Fir-Larch, Hem-Fir, and Spruce-Pine-Fir. 5. Design values based on northern species with no incising assumed. 6. Ledger shall be a minimum of 2x8 ...
2015 National Design Specification - AWC
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