A beam requires 14 pieces of 2x8 lumber at 12 feet. Using nominal board feet, how many board feet are needed?
Correct Answer
A) 224 board feet.
One nominal board foot is 144 cubic inches. With thickness and width in inches and length in feet, board feet = thickness × width × length ÷ 12. Each piece is 2 × 8 × 12 ÷ 12 = 16 board feet; 14 pieces total 224. This quantity calculation does not establish beam capacity.
Why This Is the Correct Answer
One nominal board foot is 144 cubic inches. With thickness and width in inches and length in feet, board feet = thickness × width × length ÷ 12. Each piece is 2 × 8 × 12 ÷ 12 = 16 board feet; 14 pieces total 224. This quantity calculation does not establish beam capacity.
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