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<br />XI.) Shear: <br /> <br />Model 2137 <br /> <br />Load to ceiling/roof dia:}hragm: <br />Height: 0-15 15-20 20-40 40-60 Total <br />Total hz. Pressure = 346.5 57.6 0.0 0.0 404.1 <br /> <br />pvlf <br /> <br /> <br />0.0 11719.3 lbs <br />Total shear transferred to sidewall = 11719.3 lbs <br /> <br />Unit Shear at roof diaphragm: <br /> <br />v=R/b <br />Unit Shear ( v ) =1 <br /> <br />264.41 <br /> <br />44.01 <br /> <br />0.01 <br /> <br />0.01 <br /> <br />308.4lplf <br /> <br />Unit Shear at Midheight walls ( v'): (Design case) <br /> <br />Total width of openings at mid-height wall : <br /> <br />12 <br /> <br />ft <br /> <br />Length of wall available to resist shear = <br /> <br />26 <br /> <br />ft <br /> <br />Unit Shear @ Midheight ( v' ) = <br /> <br /> <br />Select structural element to resist v' from SBC tables ie. 171O.2B <br /> <br />Shear capacity of structural element: 480 plf <br />(15/32" R.S. wI 10d nails at 4"-edges) <br /> <br />Required length of transverse shearwall = I 24,4 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 />Contributin.g Height: 11.0 1.7 .... .... -23.3 <br />-.)..) <br />Unit Hz. Pressure = 277.2 46.1 0.0 0.0 <br />Reaction (R) = 5266.8 875.7 0.0 0.0 6142.5 <br />Unit shear (v=R/l) = 90.8 15.1 0.0 0.0 105.9 <br />Tot. opngs. @ mid ht 29.5 29.5 29.5 29.5 29.5 <br />Unit Shear ( v') = 184.8 30.7 0.0 0.0 215.5 <br /> <br />lbs <br /> <br />ft <br /> <br />Page 8 <br /> <br /> <br />Required length of longitudinal shearwall =1 12.8 1ft <br />