308.5 Interval of support.
PC § 308.5
Pipe shall be supported in accordance with Table 308.5. Table 308.5Hanger Spacing Piping MaterialMaximumHorizontal Spacing(feet)MaximumVertical Spacing(feet)Piping MaterialMaximumHorizontal Spacing(feet)MaximumVertical Spacing(feet)Acrylonitrile butadiene styrene (ABS) pipe410 bBrass pipe1010Cast-iron pipe5 aAt base and at each story height no greater than 20Copper or copper-alloy pipe12At each story height no greater than 12Copper or copper-alloy tubing, 1 1/4-inch diameter and smaller6At each story height no greater than 10Copper or copper-alloy tubing, 1 1/2-inch diameter and larger10At each story height no greater than 10Polyvinyl chloride (PVC) pipe410 bStainless steel drainage systems1010 bSteel pipe12At base and at each story height no greater than 15 For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. a. The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where 10-foot lengths of pipe are installed. b. For sizes 2 inches and smaller, a guide shall be installed midway between required vertical supports. Such guides shall prevent pipe movement in a direction perpendicular to the axis of the pipe.
