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Mechanical Joint Coupled Joint Pipe

Standard Laying Conditions

ANSI/AWWA C150/A21.50
ANSI/AWWA C151/A21.51

2 1 1 1 5A Ft Laying Conditions Print

Flat-bottom trench.1 Loose backfill. (Not recommended for 14" and larger pipe.)

2 1 1 1 5B Ft Laying Conditions Print

Flat-bottom trench.1 Backfill lightly consolidated to centerline of pipe.

2 1 1 1 5C Ft Laying Conditions Print

Pipe bedded in 4” minimum loose soil.2 Backfill lightly consolidated to top of pipe.

2 1 1 1 5D Ft Laying Conditions Print

Pipe bedded in sand, gravel or crushed stone to depth of 1/8 pipe diameter, 4” minimum. Backfill compacted to top of pipe. (Approximately 80% Standard Proctor, AASHTO T-99.)

2 1 1 1 5E Ft Laying Conditions Print

Pipe bedded to its centerline in compacted granular 3 material, 4” minimum under pipe. Compacted granular or select material 2 to top of pipe. (Approximately 90% Standard Proctor, AASHTO T-99.)

1.) “Flat-bottom” is defined as undisturbed earth.
2.) “Loose soil” or “select material” is defined as native soil excavated from the trench, free of rocks, foreign material and frozen earth.
3.) Granular materials are defined per the AASHTO Soil Classification System (ASTM D3282) or the Unified Soil Classification System (ASTM D2487), with the exception that gravel bedding/backfill adjacent to the pipe is limited to 2" maximum particle size per ANSI/AWWA C600.