A wall requires 12 pieces of 2x10 lumber at 16 feet each. Using nominal board feet, how many board feet are needed?
Correct Answer
A) 320 board feet.
Board feet per piece are 2 x 10 x 16 / 12 = 26.67. For 12 pieces, the total is 320 board feet.
Why This Is the Correct Answer
Board feet per piece are 2 x 10 x 16 / 12 = 26.67. For 12 pieces, the total is 320 board feet.
Why the Other Options Are Wrong
Option B: 240 board feet.
240 board feet. is below the supported result for board-foot calculation; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 384 board feet.
384 board feet. is above the supported result for board-foot calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 480 board feet.
480 board feet. is above the supported result for board-foot calculation; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Checking Framing takeoff: count the condition before counting the package.
Reference Hint
Study anchor (closed-book): memorize Board-foot calculation from California Building Code, California Code of Regulations Title 24. / Title 24 California Building Code framing lumber quantity concepts; know the rule or calculation trigger without relying on exam-room lookup.
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