Pipe shall be supported in accordance with Table 308.5.
Exception: The interval of support for piping systems designed to provide for expansion/contraction shall conform to the engineered design in accordance with Section 316.1.
TABLE 308.5 HANGER SPACING
Exception: The interval of support for piping systems designed to provide for expansion/contraction shall conform to the engineered design in accordance with Section 316.1.
TABLE 308.5 HANGER SPACING
| PIPING MATERIAL | MAXIMUM HORIZONTAL SPACING (feet) | MAXIMUM VERTICAL SPACING (feet) |
| Acrylonitrile butadiene styrene (ABS) pipe | 4 | 10b |
| Aluminum tubing | 10 | 15 |
| Brass pipe | 10 | 10 |
| Cast-iron pipe | 5a | 15 |
| Chlorinated polyvinyl chloride (CPVC) pipe and tubing, 1 inch and smaller | 3 | 10b |
| Chlorinated polyvinyl chloride (CPVC) pipe and tubing,11/4 inches and larger | 4 | 10b |
| Copper or copper-alloy pipe | 12 | 10 |
| Copper or copper-alloy tubing, 11/4-inch diameter and smaller | 6 | 10 |
| Copper or copper-alloy tubing, 11/2-inch diameter and larger | 10 | 10 |
| Cross-linked polyethylene (PEX) pipe | 2.67 (32 inches) | 10b |
| Cross-linked polyethylene/ aluminum/cross-linked polyethylene (PEX-AL- PEX) pipe | 2.67 (32 inches) | 4 |
| Lead pipe | Continuous | 4 |
| Polyethylene/aluminum/ polyethylene (PE-AL-PE) pipe | 2.67 (32 inches) | 4 |
| Polyethylene of raised temperature (PE-RT) pipe | 2.67 (32 inches) | 10b |
| Polypropylene (PP) pipe or tubing 1 inch and smaller | 2.67 (32 inches) | 10b |
| Polypropylene (PP) pipe or tubing, 11/4 inches and larger | 4 | 10b |
| Polyvinyl chloride (PVC) pipe | 4 | 10b |
| Stainless steel drainage systems | 10 | 10b |
| Steel pipe | 12 | 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. |