While preparing the preconstruction estimate lock for the retail vestibule replacement, the parapet run requires 534 LF of aluminum counterflashing plus 6% waste. Stock comes in 10 ft pieces. How many pieces are required?
Correct Answer
A) 57 pieces
Linear stock count equals required length with waste divided by stock length, rounded up.
Why This Is the Correct Answer
Linear stock count equals required length with waste divided by stock length, rounded up.
Why the Other Options Are Wrong
Option B: 53 pieces
53 pieces is below the supported result for aluminum counterflashing; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 60 pieces
60 pieces is above the supported result for aluminum counterflashing; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 56 pieces
56 pieces is below the supported result for aluminum counterflashing; it likely omits allowance, conversion, coverage, or final round-up.
Memory Technique
Measure to linear, adjust for stock, then let Field Engineer set the finish line.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Flashing and sheet metal; stock-length takeoff; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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