Practice Problem 12  Back  Index  Next 
Given: A stack of 144 "4x4" pieces of lumber, each 8 feet long, is required for fence posts (a "gross" is 144 pieces). Take the weight density of the wood to be 32.5 lb/ft^{3}. Req'd: Determine the total weight of the stack. 
Sol'n: The crosssections of the "4x4s" are of 3.5" = 0.292 ft. square.

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