At the college lab corridor, during the preconstruction estimate lock, the interior pit perimeter requires 264 LF of pit-wall forms at 2.0 ft high on 2 sides. What contact area is required?
Correct Answer
C) 1,056 SF
Form contact area equals length times height times the number of formed sides.
Why This Is the Correct Answer
Form contact area equals length times height times the number of formed sides.
Why the Other Options Are Wrong
Option A: 528 SF
528 SF is below the supported result for pit-wall forms; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 1,320 SF
1,320 SF is above the supported result for pit-wall forms; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 1,057 SF
1,057 SF is above the supported result for pit-wall forms; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Pit-Wall Forms cart for Concrete Foreman: form first, contact second, whole sf last.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Concrete formwork; pit wall forms; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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