Civil · C-YBGV7

Plastic Pipe Bedding Detail

Materials

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Underground utility trench profile detailing bedding, cover depths, and backfill requirements for PVC and HDPE pipe installations. The pipe rests on a four to six-inch layer of clean sand compacted to ninety percent density, with trench width dimensioned as four inches plus twenty-five percent of the pipe outer diameter. Cover requirements specify a one-foot minimum from subgrade for high-density polyethylene pipe in paved areas, a two-foot minimum from subgrade or concrete cap for polyvinyl chloride pipe in paved areas, and a three-foot minimum cover from finish grade or concrete cap for PVC pipe. Backfill in non-paved areas follows the recommendations of the soils report. Pipe material specifications permit ASTM 3034 SDR-35 or SDR-26 PVC pipe with J-M Ring-Tite joints or approved equal, and smooth-interior ASTM D3212 high-density polyethylene pipe such as Hancor Sure-Lok WT pipe or approved equal.

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