For the look-ahead planning meeting at the stormwater-lift-station yard, the slab strip is 228 ft long and saw-cut joints are placed at 12 ft on center, including one at the starting end. How many saw-cut joints are needed?
Correct Answer
D) 20 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: 19 saw-cut joints
19 saw-cut joints is below the supported result for control-joint layout; it likely omits allowance, conversion, coverage, or final round-up.
Option B: 21 saw-cut joints
21 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: 22 saw-cut joints
22 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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