Where did you get your 62 lb/ft^3 number? Obviously I cant take into account any chemicals/treatments, so if this is a measurement you took from your own water, disregard the lower weight. Seems like a small difference, but you have a really BIG tank, so it adds up quick. If we use 8 lbs/Gallon of water weight, I get 59.848 lbs. Using straight volume, my software says 1 ft^3 of water is equal to 7.481 Gallons. I'm not trying to call you out or anything, but I've seen this a few times on various fish forums, converting units of volume (ft^3) to weight and/or converting flow rates to water velocity, etc. However, I have doubts about the number you used regarding the weight of a cubic foot (ft^3) of water. Nolapete- You are correct about the hydrostatic paradox & basic hydraulics (uniform pressure on surfaces of a fluid-filled container). I can figure it out for you if anyone needs the metric one, but too busy to do it right now. Use the total forward pressure for feet above and convert to sq. To get the total forward pressure, multiply the length * height * above result:ġ2 * 5 * 310 = 18600 lbs total pressure on front wall (and back since same dimensions.Ģ03.41 * height in meters (i.e. Even though it won't be filled to the rim, I use that in my calculation. of water, so use that and it'll be pretty accurate. water * height of tank in feetĦ2 is approx. I've taken the mystery out of the calculation and limited it to the following parameters: This is of particular interest to those, like myself, who are building big tanks. Most of us know how to calculate capacity and entire tank weight, but none that I've seen have been able to give us a formula to calculate the hydrostatic or outward pressure exerted on the walls of our tanks.
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