For the preconstruction estimate lock at the campus maintenance annex, the roof tear-off debris produces 297 CY of tear-off volume, with 20% swell or handling allowance. Each container holds 20 CY. How many dumpsters are required?
Correct Answer
B) 18 dumpsters
Container count equals adjusted debris volume divided by container capacity, rounded up.
Why This Is the Correct Answer
Container count equals adjusted debris volume divided by container capacity, rounded up.
Why the Other Options Are Wrong
Option A: 15 dumpsters
15 dumpsters is below the supported result for roof tear-off debris; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 19 dumpsters
19 dumpsters is above the supported result for roof tear-off debris; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 17 dumpsters
17 dumpsters is below the supported result for roof tear-off debris; it likely omits allowance, conversion, coverage, or final round-up.
Memory Technique
Roof cart for Superintendent Checks: container first, count second, whole units last.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Roof demolition; dumpster planning; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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