120 inch pounds = 10 foot pounds.
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Gypsum or plaster board3 3/8 inch 1.56 pounds per square foot 1/2 inch 2.08 pounds per square foot 5/8 inch 2.60 pounds per square foot
It would weigh about 14.3 pounds .
Using density of steel @ 490.06 pounds per cubic foot (approx) 8 * 10 * (1/12) * 490.06 = 3267.07 pounds (approx)
28,000 square feet x (8.5 inch / 12 inch per foot) = 19,833.3 cubic ft19,833.3 cubic ft x 62.38 pounds per cubic foot = 1,237,203 pounds1,237,203 pounds / 2,000 pounds per ton = 618.6 tons
Are we talking about pounds (currency), or pounds ( weight) . Please clarify!!!!