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RL Construction - B2411094 - CO2 <br />overturning calculations 2,100-gallon water tank <br />≔D 7.5 ft Tank Diameter <br />≔H 7.25 ft Tank Height <br />≔TankETW 325 lbf Empty Tank Weight <br />≔WaterD 62.4 pcf Water Density <br />≔TankWC =2100 gal 280.729 ft 3 Water Capacity <br />≔Wtotal =+⎛⎝⋅TankWC WaterD⎞⎠TankETW ⎛⎝⋅1.784 10 4 ⎞⎠lbf <br />≔A =⋅⎛ <br />⎝ <br />D <br />((2 <br />⎞ <br />⎠ <br />2 <br />π 44.179 ft 2 Base Area <br />≔Pgravity =――Wtotal <br />A 403.872 psf Base Pressure Due to Gravity <br />Overturning Check Due to Self-Weight (Gravity-Only) <br />≔CG =―H <br />2 3.625 ft Center of Gravity (CG, full tank) <br />Resisting Moment Due to Weight <br />≔Mresisting =⋅Wtotal ―D <br />2 6.691 10 4 ⎞⎠ft·lbf <br />≔Moverturning =⋅Wtotal 1 ft ⎛⎝⋅1.784 10 4 ⎞⎠ft·lbf <br />Factor of Safety Against Self-Weight Overturning <br />≔FS1 =―――――Mresisting <br />Moverturning 3.75 <br />check_FS1 =if FS1 1 “pass” “fail”“pass” <br />The tank is very stable against overturning due to its own weight alone <br />Seismic Overturning Stability Analysis for the Tank <br />2 of 89 <br />3201 S Halladay St <br />5/5/2025