While preparing the buyout verification pass for the civic-center ticket lobby, a reinforced slab panel is 57 ft by 18 ft by 5 in. Including 3% waste, how many cubic yards of concrete are needed?
Correct Answer
D) 16.3 CY
Convert slab thickness from inches to feet, divide by 27 cubic feet per cubic yard, then add waste.
Why This Is the Correct Answer
Convert slab thickness from inches to feet, divide by 27 cubic feet per cubic yard, then add waste.
Why the Other Options Are Wrong
Option A: 15.8 CY
15.8 CY is below the supported result for equipment housekeeping slab; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 190.0 CY
190.0 CY is above the supported result for equipment housekeeping slab; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option C: 18.3 CY
18.3 CY is above the supported result for equipment housekeeping slab; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Superintendent Validates takeoff: count the condition before counting the package.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Concrete methods; slab volume estimating; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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