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<br />XI.) Shear: <br /> <br />Swingle Home <br /> <br />Load to ceiling/roof diaphragm: <br />Height: 0-15 15-20 20-40 40-60 Total <br />Total hz. Pressure = 346.5 80.4 0.0 0.0 426.9 <br /> <br />pvlf <br /> <br /> <br />0.0 <br /> <br />9818.4 lbs <br />9818.4 lbs <br /> <br />Total shear transferred to sidewall = <br /> <br />Unit Shear at roof diaphragm: <br /> <br />v=R/b <br />Unit Shear ( v) =1 <br /> <br />217.31 <br /> <br />50.41 <br /> <br />0.01 <br /> <br />0.01 <br /> <br />267.71plf <br /> <br />Unit Shear at Midheight walls ( v'): (Design case) <br /> <br />Total width of openings at mid-height wall: 6.5 ft <br /> <br />Length of wall available to resist shear = 30.17 ft <br /> <br />Unit Shear @ Midheight ( v' ) = <br /> <br /> <br />Select structural element to resist v' from SBC tables ie. 1710.2B <br /> <br />Shear capacity of structural element: 380 plf <br />(Masonry, Fv=35psi x 2(1.25si x 12")/ft =1050 pit) <br /> <br />Required length of transverse shearwall =1 25.8 1ft <br /> <br />Longitudinal shear: <br /> <br />Height: 0-15 15-20 20-40 40-60 Total <br />Pressure: 25.2 27.6 33.6 37.2 <br />Contributing Height: 11.0 2.3 -2.7 -22.7 <br />Unit Hz. Pressure = 277.2 64.3 0.0 0.0 <br />Reaction (R) = 5082.5 1179.1 0.0 0.0 6261.5 <br />Unit shear (v=R/I) = 110.5 25.6 0.0 0.0 136.1 <br />Tot. opngs. @ mid ht 13.5 13.5 13.5 13.5 13.5 <br />Unit Shear (v') = 156.4 36.3 0.0 0.0 192.7 <br /> <br />lbs <br /> <br />ft <br /> <br />Required length of longitudinal shearwall ~I 16.5 1ft ~ . <br /> <br /> <br />Page 8 6/1 0/94 <br />