At the parking-garage stair tower, during the field-takeoff reconciliation, the curb angle is 72 ft long and anchor bolts are placed at 4 ft on center, including one at the starting end. How many anchor bolts are needed?
Correct Answer
A) 19 anchor bolts
Count the spaces along the run, then include the starting item.
Why This Is the Correct Answer
Count the spaces along the run, then include the starting item.
Why the Other Options Are Wrong
Option B: 18 anchor bolts
18 anchor bolts is below the supported result for anchor-bolt layout; it likely omits allowance, conversion, coverage, or final round-up.
Option C: 20 anchor bolts
20 anchor bolts is above the supported result for anchor-bolt layout; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option D: 21 anchor bolts
21 anchor bolts is above the supported result for anchor-bolt layout; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Measure to count, adjust for spaces, then let Foreman Checks set the finish line.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Anchorage methods; bolt spacing layout; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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