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Seismic Calculations - Waste Oil Tank <br />Calculating Seismic Forces <br />From 2006 International Building Code, ACE 7-05 <br />Latitiude Longitude <br />37.9410840 -121.2764450 <br />Seimic accel Seimic accel <br />0.2 sec 1.0 sec <br />0.9830 0.5330 <br />Shear <br />Tank length <br />44 inches <br />Tank width <br />44 inches <br />Tank height <br />64 inches <br />Tank capacity <br />200 gallons <br />Weight tank contents full tank <br />1668 pounds <br />Weight tank <br />1500 pounds <br />from tank specs <br />Weight tank and contents <br />3168 <br />Number of bolts <br />4 <br />Bolt size <br />3/4" <br />Bolt strength, shear <br />4275 pounds <br />Total bolt strength, four 3/4" bolts <br />17100 pounds <br />Max V <br />0.19660983 W <br />Max V <br />622.86 pounds <br />ok in shear <br />Overturning <br />Overturning moment <br />1660.96 ft lbs <br />Resisting moment due to weight of tank <br />and contents <br />5046.35 ft lbs <br />assume vertical force of earthquake = 2/3 V <br />Pullout strength of 3/4"" bolt <br />2825 pounds <br />Resisting moment due to one bolt <br />10358.33 ft lbs <br />Resisting moment two bolts <br />20716.67 ft lbs <br />ok for overturning - at least two bolts resist overturning in <br />every direction <br />