A grade beam is 300 lf long, 24 in wide, and 18 in deep. Including 5% waste, how many cubic yards of concrete should be carried?
Correct Answer
A) 35.0 cy
Convert dimensions to feet, compute volume, convert to cubic yards, and add waste.
Why This Is the Correct Answer
Convert dimensions to feet, compute volume, convert to cubic yards, and add waste.
Why the Other Options Are Wrong
Option B: 33.3 cy
33.3 cy is below the supported result for grade beam concrete; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 37.5 cy
37.5 cy is above the supported result for grade beam concrete; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 42.0 cy
42.0 cy is above the supported result for grade beam concrete; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Grade Beam Concrete cart for Estimator Prices: convert first, dimensions second, whole cy last.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 11th Edition, 2024 to Estimating and quantity takeoff; grade beam volume; verify quantity math, FL permit status, notice step, or field-control timing.
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