When compacting over pipes, the recommended lift thickness is how many inches?

The recommendation for lift thickness when compacting over pipes is typically in the range of 2 to 4 inches. This range is optimal because it allows for effective compaction without risking damage to the pipe beneath. When lifts are too thick, the weight and pressure from the compaction equipment can cause excessive load on the pipe, potentially leading to deformation or failure.

By using a lift thickness of 2 to 4 inches, the compaction process is more controlled and enables the use of proper techniques to achieve the required density of the surrounding material, ensuring the stability and integrity of the installation. Additionally, this lift thickness allows for better moisture management and reduces the likelihood of air pockets or voids forming around the pipe, which can occur with deeper lifts if not carefully managed.