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Roof and Gable Wall Shear Loads and Diaphragm Design <br /> Roof <br /> Roof width= 21 ft. <br /> Hroof= 3.50 ft. <br /> Total roof wind pres.,0.6 x P= -2 45 psf(0.6 x Pr) <br /> Total roof wind pressure to use= 4.80 psf-use 0 if Pr<0 <br /> Total wall wind pressure= 10.30 psf(0.6 x(qww-qir)) <br /> Total wall wind pressure to use= 10.30 psf-use 0.6 x 16=9.6 psf minimum <br /> Diaphragm seismic load= 129 lbs-(Vroof/2)x 0.7 <br /> Diaphragm wind load= 582 lbs <br /> Diaphragm load to use= 582 lbs-Wind load controls <br /> Roof shear= 28 plf <br /> Sheathing= Metal over OSB wood sheathing <br /> Allowable shear= 230 plf>Roof shear-OK <br /> Sheathing fastening= 8d nails 6 in.o.c.edges <br /> 12 in.o.c.field <br /> Gable walls <br /> Left Gable Wall <br /> Left gable wall shear Vseismic= 176 lbs-VLGw x 0.7 <br /> Left gable wall shear Vw;nd= 582 lbs-from Diaphragm wind load above <br /> Diaphragm load to use= 582 lbs-Wind controls <br /> Left Gable wall= 28 plf <br /> Allowable shear= 335 plf>Wall shear-OK <br /> Sheathing fastening= 8d nails @ 6 in.o.c.edges <br /> Block all panel edges 12 in.o.c.field <br /> Right Gable Wall <br /> Right gable wall shear Vseismic= 176 lbs-VRGw x 0.7 <br /> Right gable wall shear Vwlnd= 582 lbs-from diaphragm wind load above <br /> Diaphragm load to use= 582 lbs-Wind controls <br /> Right Gable wall= 28 plf <br /> Allowable shear= 335 plf>Wall shear-OK <br /> Sheathing fastening= 8d nails© 6 in.o.c.edges <br /> Block all panel edges 12 in.o.c.field <br /> Page 9 of 13 <br />