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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 CD plywood sheathing, 15/32 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 /> <br />= 6941 pounds <br />= 3470 pounds <br />- 48 feet <br /> <br />Actual diaphragm force per unit length of shearwall <br />Allowable diaphragm force per unit length of shearwall <br /> <br />- 76 plf <br />= 240 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 CD plywood sheathing, 15/32 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 /> <br />= 5116 pounds <br />2558 pounds <br />= 64 feet <br /> <br />Actual diaphragm force per unit length of shearwall <br />Allowable diaphragm force per unit length of shearwall <br /> <br />= 39 pIf <br />= 209 plf <br /> <br />-------------------------------------------------------------------.------------ <br /> <br />*** Summary of Analysis *** <br />Roof sheathing,diaphragm satisfies Code requirements. <br />