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Mechanical Padding is a process whereby screened material of a consistent selected particle size (-0.5”, -0.75”, -1.0”, etc.) is placed under, on and around a pipeline, utility line, cable, conduit, etc. (the “Line”) situated at the bottom of a trench or ditch to protect it from being damaged by hard and/or oversized material during the backfill process. Mechanical Padding not only generates a non-damaging material to protect the Line but, by generating small consistent particle size material, it achieves optimal soil compaction as well as maximum spoil pile replacement. Optimal backfill compaction is a further critical consideration to ensure Line reliability and longevity.

The process whereby a trench or ditch is filled-in after the welded and coated pipe has been lowered into the ditch.

Backfill Separation
A process whereby the oversize excavated material consisting of rocks, cobbles, hard lumps, debris etc. are separated from the native soil prior to backfilling.

Mechanical Padding
A process whereby select material is used to fill a specified dimension of space under, around, and on top of the pipe to provide uniform support and full consolidated pipe protection.

Click on the image below; it explains the pipeline construction process in order, and where mechanical padding comes in.