SUGGESTED HANGER SPACING AND ROD SIZE FOR STRAIGHT HORIZONTAL RUNS
HANGER SPACING, FT.
O.D., IN.	STANDARD STEEL PIPEª		COPPER TUBE	ROD SIZE, (IN.)
	WATER	STEAM	WATER	COPPER	ST / ST
1/2	7	8	5	3/8	3/8
3/4	7	9	5	3/8	3/8
1	7	9	6	3/8	3/8
1-1/2	9	12	8	3/8	3/8
2	10	13	8	3/8	3/8
2-1/2	11	14	9	1/2	1/2
3	12	15	10	1/2	1/2
4	14	17	12	1/2	5/8
6	17	21	14	5/8	3/4
8	19	24	16	3/4	3/4
10	22	26	18	3/4	7/8
12	23	30	19	3/4	7/8
14	25	32	x		1
16	27	35	x		1
18	28	37	x		1
20	30	39	x		1-1/4

Source: Adapted from MSS Standard SP-69
ªSpacing does not apply where span calculations are meade or where concentrated loads are placed between supports such as flanges, valves, specialties, etc.

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