substitution request - Alliance Construction Solutions

Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
1-1/4" through 2" 10'-0" 3/8"
2-1/2" through 5" 12'-0" 1/2"
6" through 8" 14'-0" 3/4"
Note: Maximum hanger spacings shown in Table 2 are based on maximum sag of 0.1” between
hangers for straight pipe. Hanger spacing must be reduced to compensate for any valves and/or
fittings installed in the pipe run. Spacing shall limit sag to 0.1” between hangers. Minimum
hanger spacing for fire protection piping shall be per appropriate NFPA requirements.
M. Support cast iron piping, in addition to the requirements of Table 3, as follows:
1. Hub & Spigot – All sizes: One hanger to each joint, minimum.
2. No-Hub – All sizes:
a. With Clamp-All and Anaheim Series 4000 stainless steel couplings and
MG cast iron couplings: one hanger to each joint.
b. With all other stainless steel band-type couplings: one hanger to each
side of joint.
3. Support all horizontal cast iron pipe within 18 inches of each joint.
4. Use hanger rods same size as required for steel.
5. Support vertical cast iron pipe at each story height and at its base. Secure vertical
hub-and-spigot pipe immediately below the hub. Support vertical no-hub pipe so
that the weight is carried from the pipe to the support and not from the joint to the
support.
N. Place a hanger within one foot (0.305 m) of each horizontal elbow.
O. Use hangers which are vertically adjustable 1-1/2 inches (38.1 mm) minimum after piping
is erected.
P. Support vertical steel and copper piping at every story height, but at not more than 15-foot
intervals for steel and cast iron and 10-foot intervals for copper.
Q. Where several pipes can be installed in parallel and at same elevation, provide trapeze
hangers. All hanger members shall be sized with 5-to-1 safety factor. Verify load bearing
capacity of structure before installation of trapeze hangers.
R. Where practical, support riser piping independently of connected horizontal piping.
S. Support steam supply and condensate return pipe runs on adjustable roller hangers.
T. Each pipe drop to equipment shall be adequately supported. All supporting lugs or guides
shall be securely anchored to the building structure.
U. Securely anchor and support plumbing domestic water piping in chases or walls. Use
factory manufactured clamps and brackets connected to fixture carriers, wall studs or floor.
Wires or straps will not be permitted.
1. When copper supplies are connected to flush valves, support the tubing by the
studs or by a fixture carrier, not by clamping to waste/vent piping.
23 0529 - 9 HANGERS AND SUPPORTS FOR
HVAC PIPING AND EQUIPMENT