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Work Item

ASTM WK92347

Revision of D2321-20 Standard Practice for Underground Installation of Thermoplastic Pipe for Sewers and Other Gravity-Flow Applications

Rationale

When placing dumped or poured backfill such as washed #57 and #67 stone, or CLSMs around pipe, the minimum trench widths are allowed to be reduced based on engineering review as outlined in Section 6.3. In my experience, public and private entities are hesitant to deviate from a minimum of 8” on either side of the pipe standard, even with engineering guidance. To help with this issue, I would like to review other industry standards (harmonizing where possible) and come up with additional language and illustrations for when backfill not requiring compaction or requiring minimal compaction is used around thermoplastic pipe.

Details

Developed by Subcommittee: F17.62

Committee: F17

Staff Manager: Kevin Shanahan

Work Item Status

Date Initiated: 09-24-2024

Technical Contact: Shawn Coombs

Item: 002

Ballot: F17.62 (24-06)

Status: Will Reballot Item

Item: 001

Ballot: F17.62 (25-01)

Status: In Balloting

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