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Project MgmtConstructionmedium63% of exam part

While preparing the subcontractor quantity check for the maintenance-shop wash bay, the one-sided curb line requires 336 LF of curb forms at 2.5 ft high on 1 side. What contact area is required?

Correct Answer

B) 840 SF

Form contact area equals length times height times the number of formed sides.

Answer Options
A
336 SF
B
840 SF
C
1,050 SF
D
841 SF

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: 336 SF

336 SF is below the supported result for curb forms; it likely omits allowance, conversion, coverage, or final round-up.

Option C: 1,050 SF

1,050 SF is above the supported result for curb forms; it likely double-counts allowance, uses the wrong unit, or rounds too early.

Option D: 841 SF

841 SF is above the supported result for curb forms; it likely double-counts allowance, uses the wrong unit, or rounds too early.

Memory Technique

Measure to form, adjust for contact, then let Concrete Foreman set the finish line.

Reference Hint

Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Site concrete formwork; curb contact area; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.

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