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<br />X) Shear (Cont.): <br /> <br />Christopher Residence <br /> <br />Roof Diaphragm: <br /> <br />Maximum shear at roof I wall interface = 209.3 plf <br /> <br />Capacity of non-blocked sheathing (SBC Table 1710.2A) = 230.0 plf <br /> <br />Capacity of blocked sheathing (diaphragm) = <br /> <br />plf . <br /> <br />Half Building length = <br /> <br />26.7 ft <br /> <br />Slope of the shear diagram = <br /> <br />7.8 plf 1ft <br /> <br />Diaphragm length required to resist shear = <br /> <br />0.0 ft <br /> <br />( Round value up to nearest truss multiple of truss spacing) <br /> <br />Analysis of shear at roof/wall interface: <br /> <br />Location along Distance Shear at <br />building length from endwall (ft) interface (plf) <br />Endwall 0.0 209.3 <br />0.1 * Length 5.3 167.4 <br />0.2 * Length 10.7 125.6 <br />0.3 * Length 16.0 83.7 <br />0.4 * Length 21.3 41.9 <br />Mid-span 26.7 0.0 <br />0.6 * Length 32.0 -41. 9 <br />0.7 * Length 37.3 -83.7 <br />0.8 * Length 42.7 -125.6 <br />0.9 * Length 48.0 -167.4 <br />Endwall 53.3 -209.3 <br /> <br />Diaphragm Tension (T): <br /> <br />1/2 x V(max) x L/2 x L/6 = T x <br /> <br />Therefore, T = R x L^2 I 24W = <br /> <br />433 lbs <br /> <br /> <br />Page 9 <br />