For the field-takeoff reconciliation at the parking-garage stair tower, the exam-room perimeter requires 310 LF of rubber wall base plus 10% waste. Stock comes in 120 ft coils. How many coils are required?
Correct Answer
D) 3 coils
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 A: 2 coils
2 coils is below the supported result for rubber wall base; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 4 coils
4 coils is above the supported result for rubber wall base; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option C: 5 coils
5 coils is above the supported result for rubber wall base; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Rubber Wall Base cart for Field Engineer: linear first, stock second, whole units last.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Resilient finishes; base coil quantity; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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