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<br />**** ANALYSIS OF ROOF SHEATHING AS SHEAR DIAPHRAGM TRANSVERSE **** <br />Shear analysis applies along supporting shearwalls. <br /> <br />Roof trusses are Southern Pine lumber, spaced at 24 inches <br />Sheathing is Oriented Strand Board, 7/16 inch thick <br />Sheathing has no intermediate blocking <br />Fasteners on panel ends are 8d nails spaced at 6 inches <br />Fasteners in panel interior are 8d nails spaced at 12 inches <br /> <br />Total lateral wind force on building <br />Total force transferred through diaphragm <br />Total length of shearwalls <br />MINIMUM REQUIRED TOTAL SHEARWALL LENGTH = <br /> <br />= 8162 pounds <br />to shearwalls = 4081 pounds <br />= 56 feet <br />18.6 FT.--LOCATE EVENLY THROUGHOUT <br /> <br />Actual diaphragm force per unit length of shearwall <br />Allowable diaphragm force per unit length of shearwall <br /> <br />= 76 plf <br />= 230 plf <br /> <br />------------------------------------------------------------------------------- <br /> <br />*** Summary of Analysis *** <br />Roof sheathing diaphragm satisfies Code requirements. <br /> <br />**** ANALYSIS OF ROOF SHEATHING AS SHEAR DIAPHRAGM LONGITUDINAL **** <br />Shear analysis applies along supporting shearwalls. <br /> <br />Roof trusses are Southern Pine lumber, spaced at 24 inches <br />Sheathing is Oriented Strand Board, 7/16 inch thick <br />Sheathing has no intermediate blocking <br />Fasteners on panel ends are 8d nails spaced at 6 inches <br />Fasteners in panel interior are 8d nails spaced at 12 inches <br /> <br />Total lateral wind force on building <br />Total force transferred through diaphragm to shearwalls <br />Total length of shearwalls <br />MINIMUM REQUIRED TOTAL SHEARWALL LENGTH = <br /> <br />= 4387 pounds <br />= 2193.5 pounds <br />= 80 feet <br />10.4 FT.--LOCATE EVENLY THROUGHOUT <br /> <br />Actual diaphragm force per unit length of shearwall <br />Allowable diaphragm force per unit length of shearwall <br /> <br />= 27 plf <br />= 209 plf <br /> <br />------------------------------------------------------------------------------- <br /> <br />*** Summary of Analysis *** <br />Roof sheathing diaphragm satisfies Code requirements. <br />