Interval of support.
Municipal Code of Chicago § 18-28-305.4
in effect18-28-305.4 Interval of support.
Piping shall be either supported at distances not exceeding the spacing specified in Table 18-28-305.4, Piping Support Spacing.
Table 18-28-305.4
Piping Support Spacing a
Piping Material | Maximum Horizontal Spacing (feet) | Maximum Vertical Spacing (feet)
Piping Material | Maximum Horizontal Spacing (feet) | Maximum Vertical Spacing (feet)
ABS pipe | 4 | 10 c
Aluminum pipe and tubing | 10 | 15
Brass pipe | 10 | 10
Brass tubing, 1 1/4-inch diameter and smaller | 6 | 10
Brass Tubing, 1 1/2-inch diameter and larger | 10 | 10
Cast-iron pipe b | 5 | 15
Copper or copper-alloy pipe | 12 | 10
Copper or copper-alloy tubing, 1 1/4-inch diameter and smaller | 6 | 10
Copper or copper-alloy tubing, 1 1/2-inch diameter and larger | 10 | 10
CPVC pipe or tubing, 1 inch and smaller | 3 | 10 c
CPVC pipe or tubing, 1 1/4-inch and larger | 4 | 10 c
Steel Pipe | 12 | 15
Steel Tubing | 8 | 10
Lead pipe | Continuous | 4
PB pipe or tubing | 2 2/3 (32 in.) | 4
PEX Tubing | 2 2/3 (32 in.) | 10 c
PVC pipe | 4 | 10 c
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm.
a See Section 18-28-301.18.
b The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where 10-foot lengths of pipe are installed.
c Mid-story guide.
(Amend Coun. J. 9-14-21, p. 35949, Art. III, § 4)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2686753Fetched: 10/24/2026