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Diffusion Tank SHEET NO.:_______ <br />BY: HL DATE: 10/13/2020 <br />CHK'D: ___ DATE: ______ <br />Seismic Anchorage Design <br />Roof - Diffusion Tank <br /> Diameter Equipment Information; <br />Weight =2277 lbs <br /> BC Diameter =24 inch <br /> a Height =126 inch <br /> C.G b Ht. to C.G. =63 inch <br />Wo =2.5 <br /> Plan View N, Number of Leg =3 <br /> Front Elev.BC =26 inch <br /> a =18 inch <br />b =6 inch <br />Seismic Force; ASCE 7-10, Section 13.3 <br />Fp =0.57 Wp (Ult) = 0.41 Wp (Allow) = 1302 lbs (Ult) = 930 lbs (Allow) <br />Wo Fp == 3254 lbs (Ult)= 2324 lbs (Allow) <br />Fp vert =0.19 Wp (Ult) = 0.14 Wp (Allow) <br />W n1 =0.9 Wp - Fp vert = 0.71 Wp (Ult)= 1615 lbs (Ult) <br />W n2 =1.2 Wp + Fp vert =1.39 Wp (Ult)= 3166 lbs (Ult) <br />W n1 =0.6 Wp - Fp vert = 0.46 Wp (Allow) = 1056 lbs (Allow) <br />W n2 =Wp + Fp vert = 1.14 Wp (Allow) = 2587 lbs (Allow) <br /> <br />Check Over-Turning; Curvature Formula <br />T = 4 * Fp * C.G. / (N * BC) - Wn / N <br />= <br />Check Sliding; <br />V = Fp = <br />Assume minimum 1/4" weld, 3" long at each leg (Observations confirm this) <br />TMAX =3666 lbs (Ult)TCAP =16703 lbs (Ult)DCR T =0.22 <1.0 OK <br />VMAX =434 lbs (Ult)VCAP =16703 lbs (Ult)DCR V =0.03 <1.0 OK <br />DCR = (T/ Tcap)+(V/ Vcap) =0.25 <1.2 OK <br /> Diameter <br />Height3666 lbs / Leg (Ult) 3666 lbs / Leg (Ult) <br /> 1302 lbs / 3 Legs = 434 lbs / Leg (Ult) <br />Diffusion Tank Equipment Anchorage Leprino Foods Tracy