Cast Iron Soil Pipe & Fittings Handbook, Chapter 2, Installation of Cast Iron Soil Pipe and Fittings

Cast Iron Soil Pipe & Fittings Handbook

Chapter 2 - Installation of Cast Iron Soil Pipe and Fittings

Above Ground Installation Procedures

With attention to a few basic rules the installation of cast iron soil pipe and fittings is easily accomplished.

Cast iron soil pipe installed in the horizontal position shall be supported at every hub (Hub & Spigot) or coupling (Hubless). The hanger shall be placed within 18" of the hub or coupling. Joints used for connecting cast iron soil pipe possess sufficient shear strength to require one hanger per joint or hub.
Installations requiring multiple joints within a four foot developed length shall be supported at every other or alternating hubs or couplings.

Vertical components shall be secured at each stack base and at sufficiently close intervals to keep the system in alignment and to adequately support the pipe and its contents. Riser clamps, sometimes called floor or friction clamps are required for vertical piping in multistory structures in order for each floor not to exceed 15'0".

Large Diameter Fittings

Horizontal pipe and fittings five (5) inches and larger shall be suitably braced to prevent horizontal movement. This shall be done at every branch opening or change of direction by the use of braces, blocks, rodding or other suitable method, to prevent movement.

Closet bends, traps, trap-arms and similar branches must be secured against movement in any direction. Closet bends installed above ground shall be stabilized by firmly strapping and blocking. Where vertical closet stubs are used they must be stabilized against horizontal or vertical movements.