Where should thrust blocks be placed for proper installation?

Thrust blocks are critical components in a pipe system that help manage the forces generated by changes in direction or elevation of the pipe. Proper installation of thrust blocks is essential for ensuring stability and preventing movement or damage to the pipe system.

The correct placement of thrust blocks on the fitting with undisturbed soil is important because this location provides a stable and secure base that can effectively absorb and distribute the stresses exerted on the pipe fittings. Undisturbed soil offers better support due to its compactness, which is necessary for supporting the weight of the thrust block and the pipe system.

When thrust blocks are placed incorrectly, such as at the pipe joint or directly on the pipe, they may not provide the necessary support, leading to potential failure of the pipe joint or movement of the pipe itself. Likewise, placing them at the trench base may not adequately address the specific forces acting on the fittings, especially if the surrounding soil is disturbed or loose. This can lead to instability within the entire pipeline system.