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Section P-601 Vertical Piping
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Vertical piping shall be secured at sufficient intervals to keep the pipe in alignment and to carry the
weight of the pipe and contents.
Supports shall provide secure support for the pipe without excessive strain on joints or
connections and shall properly transmit the load to the building structure or to independent posts, piers, and
foundations.
All vertical drainage piping shall have base supports and, when more than 30 feet in height,
shall have intermediate supports spaced not more than 2 stories or 25 feet on centers. Closet bends, traps, trap-arms
and similar branches shall be firmly secured against movement in any direction.
Exception: No-hub cast iron soil pipe shall be supported with a riser clamp located at each floor. When the distance
between floors is greater than 10 feet, the vertical piping shall be supported every 10 feet using riser clamps where
possible or rigid supports securely fastened to the building structure.
Aluminum and plastic pipe shall be supported a minimum of at least 5 feet on
centers and closer, if required, to prevent horizontal deformation of the piping.
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