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// CODE SNIPPET

Section P2604 Trenching and Backfilling

Residential Code 2018 of Kansas > 26 General Plumbing Requirements > P2604 Trenching and Backfilling
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P2604.1 Trenching and Bedding

Where trenches are excavated such that the bottom of the trench forms the bed for the pipe, solid and continuous load-bearing support shall be provided between joints. Where over-excavated, the trench shall be backfilled to the proper grade with compacted earth, sand, fine gravel or similar granular material. Piping shall not be supported on rocks or blocks at any point. Rocky or unstable soil shall be over-excavated by two or more pipe diameters and brought to the proper grade with suitable compacted granular material.

P2604.2 Water Service and Building Sewer in Same Trench

Where the water service piping and building sewer piping is installed in same trench, the installation shall be in accordance with Section P2906.4.1.

P2604.3 Backfilling

Backfill shall be free from discarded construction material and debris. Backfill shall be free from rocks, broken concrete and frozen chunks until the pipe is covered by not less than 12 inches (305 mm) of tamped earth. Backfill shall be placed evenly on both sides of the pipe and tamped to retain proper alignment. Loose earth shall be carefully placed in the trench in 6-inch (152 mm) layers and tamped in place.

P2604.4 Protection of Footings

Trenching installed parallel to footings and walls shall not extend into the bearing plane of a footing or wall. The upper boundary of the bearing plane is a line that extends downward, at an angle of 45 degrees (0.79 rad) from horizontal, from the outside bottom edge of the footing or wall.

Related Code Sections


Section P2604 General Plumbing Requirements, Trenching and Backfilling
be provided between joints. Where over-excavated, the trench shall be backfilled to the proper grade with compacted earth, sand, fine gravel or similar ...
Residential Code 2018 of Kansas > 26 General Plumbing Requirements > P2604 Trenching and Backfilling
Section 306 General Regulations, Trenching, Excavation and Backfill
does not form the bed for the pipe, the trench shall be backfilled to the installation level of the bottom of the pipe with sand or fine gravel placed ...
Plumbing Code 2018 of Kansas > 3 General Regulations > 306 Trenching, Excavation and Backfill
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Plumbing Code 2018 of Kansas > 3 General Regulations > 306 Trenching, Excavation and Backfill > 306.2 Trenching and Bedding > 306.2.2 Rock Removal
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If soft materials of poor load-bearing quality are found at the bottom of the trench, stabilization shall be achieved by overexcavating not less than ...
Plumbing Code 2018 of Kansas > 3 General Regulations > 306 Trenching, Excavation and Backfill > 306.2 Trenching and Bedding > 306.2.3 Soft Load-Bearing Materials
306.3 General Regulations, Backfilling
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Plumbing Code 2018 of Kansas > 3 General Regulations > 306 Trenching, Excavation and Backfill > 306.3 Backfilling
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