![]() ![]() ![]() Where horizontal pipes 4 inches (102 mm) and larger convey drainage or waste, and where a pipe fitting changes the flow direction greater than 45 degrees (0.79 rad), rigid bracing or other rigid support arrangements shall be installed to resist movement of the upstream pipe in the direction of flow.Hangers and strapping shall be of approved material that will not promote galvanic action. Hangers and anchors shall be of sufficient strength to maintain their proportional share of the weight of pipe and contents and of sufficient width to prevent distortion to the pipe.Piping in the ground shall be laid on a firm bed for its entire length, except where support is otherwise provided.Piping shall be supported to ensure alignment and prevent sagging, and allow movement associated with the expansion and contraction of the piping system.Piping shall be supported in accordance with the following:
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