Minnesota Administrative Rules

4714.0313 HANGERS AND SUPPORTS.

Subpart 1.

Section 313.

Table 313.3 is amended to read as follows:

TABLE 313.3
HANGERS AND SUPPORTS
MATERIALS	TYPES OF JOINTS	HORIZONTAL	VERTICAL
Cast	Lead and Oakum	5 feet, except 10 feet where 10 foot lengths are installed1,2,3	Base and each floor, not to exceed 15 feet
	Compression Gasket	Every other joint, unless over 4 feet then support each joint1,2,3	Base and each floor, not to exceed 15 feet
Cast-Iron Hubless	Shielded Coupling	Every other joint, unless over 4 feet then support each joint1,2,3,4	Base and each floor, not to exceed 15 feet
Copper & Copper Alloys	Soldered, Brazed, Threaded, or Mechanical	1-1/2 inches and smaller, 6 feet; 2 inches and larger, 10 feet	Each floor, not to exceed 10 feet5
Steel Pipe for Water or DWV	Threaded or Welded	3/4 inch and smaller, 10 feet; 1 inch and larger, 12 feet	Every other floor, not to exceed 25 feet5
Steel Pipe for Gas	Threaded or Welded	1/2 inch, 6 feet; 3/4 inch and 1 inch, 8 feet; 1-1/4 inches and larger, 10 feet	1/2 inch, 6 feet; 3/4 inch and 1 inch, 8 feet; 1-1/4 inches every floor level
Schedule 40 PVC and ABS DWV	Solvent Cemented	All sizes, 4 feet; allow for expansion every 30 feet3,6	Base and each floor; provide mid-story guides; provide for expansion every 30 feet6
CPVC	Solvent Cemented	1 inch and smaller, 3 feet; 1-1/4 inches and larger, 4 feet	Base and each floor; provide mid-story guides
CPVC-AL-CPVC	Solvent Cemented	1/2 inch, 5 feet; 3/4 inch, 65 inches; 1 inch, 6 feet	Base and each floor; provide mid-story guides
Lead	Wiped or Burned	Continuous Support	Not to exceed 4 feet
Steel	Mechanical	In accordance with standards acceptable to the Authority Having Jurisdiction
PEX	Cold Expansion, Insert, and Compression	1 inch and smaller, 32 inches; 1-1/4 inches and larger, 4 feet	Base and each floor; provide mid-story guides
PEX-AL-PEX	Metal Insert and Metal Compression	1/2 inch; 3/4 inch; 1 inch All sizes 98 inches	Base and each floor; provide mid-story guides
PE-AL-PE	Metal Insert and Metal Compression	1/2 inch; 3/4 inch; 1 inch All sizes 98 inches	Base and each floor; provide mid-story guides
PE-RT	Insert and Compression	1 inch and smaller, 32 inches; 1-1/4 inches and larger, 4 feet	Base and each floor; provide mid-story guides
Polypropylene (PP)	Fusion Weld (socket, butt, saddle, electrofusion), Threaded (metal threads only), or Mechanical	1 inch and smaller, 32 inches; 1-1/4 inches and larger, 4 feet	Base and each floor; provide mid-story guides

For SI units: 1 inch = 25.4 mm, 1 foot = 304.8 mm

Notes:

¹ Support adjacent to joint, not to exceed 18 inches (457 mm).

² Brace not to exceed 40-foot (12,192 mm) intervals to prevent horizontal movement.

³ Support at each horizontal branch connection.

⁴ Hangers shall not be placed on the coupling.

⁵ Vertical water lines shall be permitted to be supported in accordance with recognized engineering principles with regard to expansions and contraction, where first approved by the Authority Having Jurisdiction.

⁶ For expansion joints, see Table 313.3.1.

Subp. 2.

Section 313.

Table 313.3.1 is added to read as follows:

TABLE 313.3.1
Schedule 40 PVC and ABS DWV and Storm Pipe Expansion Table
Inside the building thermal envelope
	Length of Run (ft.)
	101	201	30
Pipe Size	Expansion joint length (in.) = L
1.5"	20	28	34
2"	22	31	38
3"	27	38	46
4"	30	43	52
6"	37	52	63
8"	42	59	72
10"	47	66	80
12"	51	72	88
Outside the building thermal envelope
	Length of Run (ft.)
	101	201	30
Pipe Size	Expansion joint length (in.) = L
1.5"	26	36	44
2"	29	41	50
3"	35	49	60
4"	40	56	68
6"	48	68	83
8"	55	77	94
10"	61	86	105
12"	66	94	114

¹ Multiple offsets shall be allowed to provide expansion for each 30-foot developed length of run.

Subp. 3.

Section 313.7.

UPC section 313.7 is deleted in its entirety.

Statutory Authority:

MS s 326B.43; 326B.435

History:

40 SR 71; 45 SR 1007

Published Electronically:

September 27, 2021