A ceiling area is 7,680 sf. Main tees are estimated at 0.84 lf per sf plus 5% waste. How many linear feet should be carried?
Correct Answer
D) 6,774 lf
Multiply area by the lineal factor and add waste.
Why This Is the Correct Answer
Multiply area by the lineal factor and add waste.
Why the Other Options Are Wrong
Option A: 6,451 lf
6,451 lf is below the supported result for acoustical grid pieces; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 7,061 lf
7,061 lf is above the supported result for acoustical grid pieces; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option C: 7,680 lf
7,680 lf is above the supported result for acoustical grid pieces; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Acoustical Grid Pieces cart for Tenant Build-Out: multiply first, area second, whole lf last.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 11th Edition, 2024 to Interior finish estimating; ceiling grid lineal factors; verify the quantity, approval point, notice rule, or field record before answering.
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