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<br />XI.) Shear: <br /> <br />Ratz Residence <br /> <br /> <br />15-20 <br />86.3 <br /> <br />20-40 <br />0.0 <br /> <br />40-60 <br />0.0 <br /> <br />Total <br />432.8 pvlf <br /> <br /> <br />; <br />:j I <br />1 <br /> <br />0.0 13198.9Ibs <br /> <br />Total shear transferred to sidewall = 13198.9 lbs <br /> <br />Unit Shear at roof diaphragm: <br /> <br />v=R/b <br />Unit Shear ( v ) =1 <br /> <br />192.21 <br /> <br />47.81 <br /> <br />0.01 <br /> <br />0.01 <br /> <br />240.01Plf <br /> <br />Unit Shear at Midheight walls ( v'): (Design case) <br /> <br />Total width of openings at mid-height wall : <br /> <br />9 <br /> <br />ft <br /> <br />Length of wall available to resist shear = <br /> <br />46 <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: 1050 plf <br />Fv=35psi x 2(1.25si x 12")/ft=1050 plf <br /> <br />Required length of transverse shearwall =1 12.6 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 2,5 -2.5 -22,5 <br />Unit Hz. Pressure = 277.2 69,0 0,0 0,0 <br />Reaction (R) = 7623.0 1897.5 0.0 0.0 9520.5 I <br />Unit shear (v=R/l) = 125.0 31.1 0.0 0,0 156.1 <br />Tot. opngs. @J mid ht 24.0 24.0 24.0 24.0 24.0 <br />Unit Shear ( v') = 206.0 51.3 0.0 0.0 257,3 -1 <br /> <br />bs <br /> <br />ft <br /> <br />Page 8 <br /> <br /> <br />arJ <br /> <br />8/1/94 <br /> <br />Required length of longitudinal shearwall =1 9.1 1ft <br />