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Section P-602 Horizontal Piping
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Supports for bell-and-spigot cast iron pipe shall be a maximum 7 feet on centers.
Cast iron no-hub soil pipe shall be supported by using threaded rod and clevis hangers. Sway bracing shall be installed where necessary. Hangers shall be provided at least every other joint, except that when the developed length between hangers exceeds 5 feet, they shall be provided at each joint. In no case shall hangers or supports be more than 5 feet apart. Hangers shall be placed immediately adjacent to the coupling. Piers of masonry or other suitable materials shall be approved to provide support.
Aluminum pipe shall be supported at maximum 5-foot intervals.
All other piping materials shall be supported at maximum 10-foot intervals.
Horizontal piping underground shall be firmly supported on the bottom of the trench, and proper depressions shall be provided under the bells of drainage piping to insure support for its entire length.
Drainage piping installed in soft soil or filled ground shall be hard copper type "L" or bell-and-spigot cast iron pipe with lead and oakum joints.
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