Laserfiche WebLink
Madison Industries <br />Designed by: ML/JF13 <br />August 4, 2016 <br />Job No: WCA17860-1 <br />Customer: Mobil Fueling Canopy <br />Structure: 65'-0" x 54'-4" (4) Column Canopy <br />Location: Tracy, CA 95377 <br />Sheet 8 <br />CBC 2013 Seismic Design Loads <br />CBC 2013 Seismic Design Loads: (reference ASCE 7-10) <br />Determine Natural Period of Canopy + Supports: <br />Stiffness: k = (3E1/L3)(Qty Columns) = <br />11.46 k/in <br />Where: Imax for each Column = <br />380 in <br />Natural frequency = w = (k/m)05 = <br />11.41 rad/sec <br />m = WcanoPy/386.4 = <br />0.088 k s2/in <br />Natural period = T =27c/w = <br />0.551 sec <br />Max permissible period (Tmax) = <br />0.253 sec <br />Governing Seismic Design Acceleration: <br />Horizontal: A; = CS = SDs/(RA) = <br />1.003 g <br />Where: SDS = (2/3)FaSs = <br />1.253 <br />Fa = <br />1.00 <br />Ss = <br />1.880 <br />R = <br />1.25 <br />Is = <br />1.00 <br />Ai(max) = Cs(max) = SD1/[T(R/1)] = <br />1.966 g <br />Where: SD1 = (2/3)FvS, = <br />0.622 g <br />F„ = <br />1.50 <br />S, = <br />0.622 <br />Vertical: A„ = 0.2SDSls = <br />0.251 g <br />Base Shear: <br />Vs = AiWcanopy = 34.1 k <br />Where: Design acceleration = A;= Cs = 1.003 g <br />WcanoPy = 34.00 k <br />Overturning Moment (at base plate level): <br />Ms = (Vs)(Hcolumn) = 642 ft -k <br />Where: Hco,"mn = 18.83 ft <br />(Sect. 12.8.2) <br />GOVERNS (Eq 12.8-2) <br />(Eq 12.8-3) <br />(Eq 12.8-1) <br />JUN 08 2017 <br />ENVI70NI ,=%T,^,.L H.HALTH <br />DEPAR T IMENT <br />