For the preconstruction estimate lock at the airport service-court canopy, the slab edge requires 376 LF of thickened-edge forms at 2.5 ft high on 1 side. What contact area is required?
Correct Answer
B) 940 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: 376 SF
376 SF is below the supported result for thickened-edge forms; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 1,175 SF
1,175 SF is above the supported result for thickened-edge forms; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 941 SF
941 SF is above the supported result for thickened-edge forms; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Concrete Foreman takeoff: count the condition before counting the package.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Concrete slab forming; edge form area; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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