1. Determine the number of board feet required for joists on a one-story house 30′ × 40′, in which 2 × 8 joists will be placed 16″ OC.
A. 2,052
B. 1,224
C. 1,632
D. 1,536
I believe the answer is B. 1,224
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2. A 4 × 12 built-up girder is 30″. How many board feet does this girder contain? (Round your answer to the nearest whole number.)
A. 107
B. 312
C. 128
D. 96
I think the answer is C.128.
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3. Calculate the number of hours needed to frame a one-story house 36′ long, in which 2 × 6 × 16 joists will be placed 16″ OC. (Round your answer to the nearest whole number.)
A. 4
B. 5
C. 7
D. 6
I think it's B. 5 hours.