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<br />XI.) Shear: <br /> <br />Load'to ceilin roof diaphragm: <br />Hei ht: 0-15 <br />Total hz, Pressure = 346,5 <br /> <br />15-20 <br />114.9 <br /> <br />Sanchez Residence <br /> <br />20-40 <br />0,0 <br /> <br /> <br /> <br />Unit Shear at roof diaphragm: <br /> <br />v=R/b <br />Unit Shear ( v ) =1 <br /> <br />0,0 12612,0 lbs <br /> <br />Total shear transferred to sidewall = 12612,0 lbs <br /> <br />240,81 <br /> <br />79.81 <br /> <br />0.01 <br /> <br />Unit Shear at Midheight walls (v'): (Design case) <br /> <br />O,Ol <br /> <br />Total width of openings at mid-height wall: 25,5 ft <br /> <br />Length of wall available to resist shear = 13,83 ft <br /> <br />Unit Shear @ Midheight (v' ) =1 <br /> <br />684.91 <br /> <br />227.11 <br /> <br />0.01 <br /> <br />Select structural element to resist v' from SBC tables ie, 171O.2B <br /> <br />0.01 <br /> <br />Shear capacity of structural element: 1050 plf <br />Fv=35psi x 2(1.25si x 12")/ft=1050 plf <br /> <br />320.7(plf <br /> <br />9U.91Plf <br /> <br />Required ltmgth of transverse shearwall =1 12.0 Jft <br /> <br />Longitudinal shear: <br />Height: <br />Pressure: <br />Contributing Height: <br />Unit Hz, Pressure = <br />Reaction (R) = <br />Unit shear (v=R/I) = <br />Tot. opn s. mid ht <br />Unit Shear (v') = <br /> <br />0-15 <br />25,2 <br />11.0 <br />277.2 <br />5451.1 <br />99,7 <br />9,0 <br />119.4 <br /> <br />15-20 <br />27.6 <br />3,3 <br />91.9 <br />1807.4 <br />33,1 <br />9.0 <br />39.6 <br /> <br />20-40 <br />33,6 <br />-1.7 <br />0.0 <br />0,0 <br />0,0 <br />9.0 <br />0,0 <br /> <br />40-60 <br />37.2 <br />-21. 7 <br />0.0 <br />0,0 <br />0,0 <br />9.0 <br />0,0 <br /> <br />Total <br /> <br />7258.5 lbs <br />132,8 <br />9,0 ft <br />158,9 <br /> <br /> <br />Required length of longitudinal shearwall =1 6.9 lft <br /> <br />Page 8 <br />