During the crew-release check at the college lab corridor, the slab strip is 246 ft long and saw-cut joints are placed at 10 ft on center, including one at the starting end. How many saw-cut joints are needed?
Correct Answer
D) 25 saw-cut joints
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 A: 26 saw-cut joints
26 saw-cut joints is above the supported result for control-joint layout; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option B: 27 saw-cut joints
27 saw-cut joints is above the supported result for control-joint layout; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Option C: 28 saw-cut joints
28 saw-cut joints is above the supported result for control-joint layout; it likely double-counts allowance, uses the wrong unit, or rounds too early.
Memory Technique
Joint Layout cart for Foreman Checks: count first, spaces second, whole units last.
Reference Hint
Open-book path: tab Principles and Practices of Commercial Construction, 10th Edition to Concrete slab control joints; spacing layout; verify the construction method, material quantity, equipment use, unit conversion, or field-control calculation.
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