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Seismic Calculations - Waste Oil Tank <br />Latitude Longitude <br />38.000012 -121.290497 <br />Seismic acceleration <br />5 MS <br />0.995 <br />Checking to see if tank is adequately secured for motion laterally <br />Shear (earthquake laterol force) <br />For all directions in schematic drawing: <br />Tank height (w/o supports) <br />60 in <br />Tank width <br />44 in <br />Tank length <br />44 in <br />Tank capacity <br />200 gal <br />Weight tank contents full <br />1501 lbs <br />Weight tank empty <br />1500 lbs <br />Weight Waste Oil Tank and contents <br />3001 lbs <br />Size of bolts anchoring tank <br />3/4" <br />Bolt strength per bolt, shear, 3/4"bolt <br />12890 lbs <br />Number of bolts <br />4 <br />Bolt strength, four bolls <br />51560 lbs <br />Max V (earthquake force) <br />0.199 W <br />Max V (earthquake force) <br />597 lbs <br />Factor of safety <br />86 <br />Overturning - directions right and left in schematic drawing: <br />Moment arm, earthquake 34 in <br />Overturning moment at Max V* 1692 lb ft <br />Seismic Calculations - Waste Oil Tank, continued <br />Value checked 9/14/17 <br />sp gr motor oil = 0.9 <br />from schematic drawing <br />This is W <br />See note below for bolt strength reference <br />ok <br />tank supports are 4" high - see manufacturer's drawing <br />overturning moment caused by earthquake <br />Resisting moment of tank** <br />3037 lb ft <br />due to weight of tank and contents, supports are 8"from sides <br />Pullout strength, 3/4" bolt <br />8110 lbs <br />See note below for bolt strength reference <br />Combined strength, two 314" bolts <br />16210 lbs <br />Moment arm, bolts <br />28 in <br />bolts are 28" apart <br />Resisting moment of bolts <br />31847 lb ft <br />Combined resisting moments <br />40883 Ib ft <br />of tank and bolts <br />Factor of safety <br />24 <br />ok <br />In directions up and down in schematic drawing, moment arm of bolts is longer. Therefore factor of safety is higher. <br />In direction up in schematic drawing, tank is also against a wall. <br />Bolt strengths from Nilti 2014 American Product Tech Guide - Kwik Bolt TZStainless Steel for 2500 psi cracked concrete. <br />Bolts into concrete have also been sealed with chemical adhesive. <br />*this calculation overstates the overturning moment because the liquid containing compartment of this tank is only in lower portion. <br />manufacturer's drawing. Therefore, it is conservative- <br />"Jar <br />onservative_ <br />**far this calculation assume that vertical component of earthquake = 2/3 Max V. <br />