At the restaurant grease-interceptor area, during the look-ahead planning meeting, the shower wall area for cement backer board is 4640 SF. With 5% waste and 15 SF per sheet or panel, how many sheets are required?
Correct Answer
A) 325 sheets
Sheet count equals area with waste divided by coverage per sheet or panel, rounded up.
Why This Is the Correct Answer
Sheet count equals area with waste divided by coverage per sheet or panel, rounded up.
Why the Other Options Are Wrong
Option B: 309 sheets
309 sheets is below the supported result for cement backer board; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 162 sheets
162 sheets is below the supported result for cement backer board; it likely omits allowance, conversion, coverage, or final round-up.
Option D: 329 sheets
329 sheets is above the supported result for cement backer board; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to sheet, adjust for count, then let Carpenter Checks set the finish line.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Tile substrate; board coverage; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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