Planning & EstimatingQuestion 278 of 360
When planning backfill over a drainage pipe laid in a trench, what is the correct practice under the CPC?
a.Dump large rocks directly on the pipe to save fill
b.Leave the pipe unsupported and backfill only the ends
c.Support the pipe on firm bedding for its full length and place backfill so the pipe is not damaged or displaced
d.Backfill only after the final inspection is passed
Explanation
CPC 314.0 requires piping to be supported on undisturbed or well-compacted material for its full length, with backfill placed in a way that does not damage or move the pipe. Rocks or point loads can crack pipe or create bellies. Proper trench and bedding planning protects the line and preserves the required slope.
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