Laserfiche WebLink
Madison Industries <br />Designed by: ML/JFB <br />August 4, 2016 <br />Job No: WCA17860-1 <br />Results of Strenath Checks: <br />Customer: Mobil Fueling Canopy <br />Structure: 65'-0" x 54'-4" (4) Column Canopy <br />Location: Tracy, CA 95377 <br />Sheet 20 <br />Roof Support Beam B2, cont. <br />Span: Bending of <br />M„Y (ft -k) <br />$hM_ (ft -k) <br />Max Due to DL + LL (ADL,LL) = L/240 = <br />` <br />Top Flange: <br />31.5 <br />< 93.3 <br />Beam is OK <br />Bottom Flange: <br />49.9 <br />< 125 <br />Beam is OK <br />Cantilever: Bending of <br />0.47 in <br />Max Due to DL + LL (ADL,LL) = L/240 = <br />Top Flange: <br />26.5 <br />< 46.3 <br />Beam is OK <br />Bottom Flange: <br />49.9 <br />< 125 <br />Beam is OK <br />Deflection Criteria: Following are recommended maximum allowable deflections; they are not req'd <br />since roof members are steel & don't support plaster. They are, however, used to <br />determine "Suggested Shape” above and may be exceeded at discretion of <br />design engineer. <br />Allowable Deflection in Span <br />Max Due to LL (ALL) = L/360 = <br />0.87 in <br />Max Due to DL + LL (ADL,LL) = L/240 = <br />` <br />1.3 in <br />Recommended Max Due to DL (ops) _ <br />0.43 in <br />Allowable Deflection in Left Cantilever: <br />OLIN 0 8 2017 <br />Max Due to LL (ALL) = L/360 = <br />0.47 in <br />Max Due to DL + LL (ADL,LL) = L/240 = <br />0.71 in <br />Recommended Max Due to DL (ODS) _ " <br />0.24 in <br />Allowable Deflection in Right Cantilever: <br />Max Due to LL (ALL) = L/360 = <br />0.47 in <br />Max Due to DL + LL (ADL.LL) = L/240 = <br />0.71 in <br />Recommended Max Due to DL (ops) _' <br />0.24 in <br />Moment of Inertia Required in order not to exceed Allowable Deflection: <br />Case 1: Full DL + LL over span; DL on cantilever -- Checks critical deflection in span <br />DL Deflection: * <br />IX = [5wDLL4/384-wDLa2L2/16-13111A2/16-P21LbL2/16]/EADL = -51.7 in <br />DL+LL Deflection: <br />1„ _ [5woL,LLL4/384-wpLa2L2/16-P1pLaL2/16-P2DLbL2/16]/EADL+LL = 49.6 in <br />LL Deflection: <br />IX = [5wLLL4/384]/EALL = 100.2 in <br />Case 2: Full DL + LL on left cantilever; DL on span -- Checks critical deflection <br />DL Deflection: * <br />IX[(P1DLa2)(L+a)/3+wDLa3(4L+3a)/24-wDLL3a/48]/EADL = 314.5 in <br />DL+LL Deflection: <br />Ix[(P1D1_+LLa2)(L+a)/3+wDL+LLa3(4L+3a)/24-wDLL3a/48]/EADL+LL = 462.4 in <br />LL Deflection: <br />IX[(P1LLa2)(L+a)/3+wLLa3(4L+3a)/24]/EALL = 536.4 in <br />(End of Design for Roof Support Beam 132) <br />