Front and side profile views of a concrete pipe trench configuration. The trench features concrete encasement with specific clearances around the pipe, including a minimum of six inches above and below the pipe outer diameter and eight inches minimum on each side. A two-inch typical clearance is maintained between the pipe sleeve and the pipe. The excavation profile notes a minimum width of one foot six inches, with compacted backfill placed over tamped sand and a restriction against excavation below the specified line.
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