While preparing the look-ahead planning meeting for the school media-center infill, the covered-walk soffit bay measures 2031 SF before a 12% waste allowance. Each rigid insulation sheet covers 48 SF. How many sheets should be ordered?
Correct Answer
C) 48 sheets
Order quantity equals area times waste factor divided by 48 SF coverage, rounded up.
Why This Is the Correct Answer
Order quantity equals area times waste factor divided by 48 SF coverage, rounded up.
Why the Other Options Are Wrong
Option A: 42 sheets
42 sheets is below the supported result for rigid insulation at soffit; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 50 sheets
50 sheets is above the supported result for rigid insulation at soffit; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 49 sheets
49 sheets is above the supported result for rigid insulation at soffit; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Estimator Checks takeoff: count the condition before counting the package Tie the cue to Rigid Insulation Soffit Estimator.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Thermal and moisture protection; insulation boards; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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