18-28-305.4 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	Max. Horiz. Spacing (feet)	Max. Verti. 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 18-28-301.14.

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.