Underground Pipe work Sample Clauses

Underground Pipe work. All underground potable water pipes shall be galvanized steel pipe (schedule 40). Underground water pipes shall not be run in the same trench as sewer pipes. Adequate precautions shall be taken for protecting underground water pipes from contamination from any source. All underground pipe work unless otherwise indicated shall be laid at a depth of a 900 mm below finished level. Underground pipe work shall be bedded on sand with a compaction ratio of less than 0.15, or small gravel. Initial backfill to a cover of 300mm shall be hand consolidated. Backfill material shall be no greater than capable of passing through a 20mrn diameter B.S. 1377 sieve. Mechanical ramming of subsequent backfill shall not commence until at least 300mm cover has been hand compacted.