INSTALLATION REQUIREMENTS FOR HANGING AND SUPPORT OF SYSTEM PIPING 13-127
Chapter 17 Installation Requirements for Hanging and 17.1.6 Listing.
Support of System Piping
17.1.6.1* Unless permitted by 17.1.6.2 or 17.1.6.3, the compo‐
17.1* General. nents of hanger assemblies that directly attach to the pipe,
building structure, or racking structure shall be listed.
17.1.1 Unless the requirements of 17.1.2 are met, types of
hangers shall be in accordance with the requirements of Chap‐ 17.1.6.2* Mild steel hanger rods and hangers formed from
ter 17. mild steel rods shall be permitted to be not listed.
17.1.2 Hangers certified by a registered professional engineer 17.1.6.3* Fasteners as specified in 17.2.2, 17.2.3, and 17.2.4
to include all of the following shall be an acceptable alternative shall be permitted to be not listed.
to the requirements of Chapter 17: 17.1.6.4 Other fasteners shall be permitted as part of a hanger
(1) Hangers shall be designed to support five times the assembly that has been tested, listed, and installed in accord‐
weight of the water-filled pipe plus 250 lb (115 kg) at ance with the listing requirements.
each point of piping support. 17.1.7 Component Material.
(2) These points of support shall be adequate to support the
system. 17.1.7.1 Unless permitted by 17.1.7.2 or 17.1.7.3, hangers and
(3) The spacing between hangers shall not exceed the value their components shall be ferrous metal.
given for the type of pipe as indicated in Table 17.4.2.1(a)
or Table 17.4.2.1(b). 17.1.7.2 Nonferrous components that have been proven by
(4) Hanger components shall be ferrous. fire tests to be adequate for the hazard application, that are
(5) Detailed calculations shall be submitted, when required listed for this purpose, and that are in compliance with the
by the reviewing authority, showing stresses developed in other requirements of this section shall be acceptable.
hangers, piping, and fittings, and safety factors allowed. 17.1.7.3 Holes through solid structural members shall be
17.1.3 Support of Non-System Components. permitted to serve as hangers for the support of system piping,
provided such holes are permitted by applicable building codes
17.1.3.1* Sprinkler piping or hangers shall not be used to and the spacing and support provisions for hangers of this
support non-system components. standard are satisfied.
17.1.3.2 Sprinkler piping shall be permitted to utilize shared 17.2 Hanger Components.
support structures in accordance with 17.1.4.
17.2.1 Hanger Rods.
17.1.4 Shared support structures shall be certified by a regis‐
tered professional engineer in accordance with 17.1.2 and 17.2.1.1 Unless the requirements of 17.2.1.2 are met, hanger
17.1.4. rod size shall be the same as that approved for use with the
hanger assembly, and the size of rods shall not be less than that
17.1.4.1* The design of a shared support structure shall be given in Table 17.2.1.1.
based on either 17.1.4.1.1 or 17.1.4.1.2.
17.2.1.2 Rods of smaller diameters than indicated in Table
17.1.4.1.1 Sprinkler pipe and other distribution systems shall 17.2.1.1 shall be permitted where the hanger assembly has
be permitted to be supported from a shared support structure been tested and listed by a testing laboratory and installed
designed to support five times the weight of water-filled sprin‐ within the limits of pipe sizes expressed in individual listings.
kler pipe and other supported distribution systems plus 250 lb
(115 kg), based on the allowable ultimate stress.
17.1.4.1.2 Sprinkler pipe and other distribution systems shall
be permitted to be supported from a shared support structure
designed to support five times the weight of the water-filled
Table 17.2.1.1 Hanger Rod Sizes
sprinkler pipe plus 250 lb (115 kg), and one and one-half times
the weight of all other supported distribution systems.
Pipe Size Diameter of Rod
17.1.4.1.3 The building structure shall not be considered a
shared support structure. in. mm in. mm
3
17.1.4.1.4* The requirements of 17.1.4.1 shall not apply to Up to and 100 ∕8 10
17.4.1.3.3. including 4
1
17.1.4.1.5 Systems that are incompatible with the fire sprin‐ 5 125 ∕2 13
kler systems based on vibration, thermal expansion and 6 150
contraction, or other factors shall not share support structures. 8 200
5
17.1.5 Where water-based fire protection systems are required 10 250 ∕8 16
3
to be protected against damage from earthquakes, hangers 12 300 ∕4 20
shall also meet the requirements of Section 18.7.
2019 Edition
