Pipe Hanger Spacing Calculator

Determine maximum pipe hanger spacing per NFPA 13 for sprinkler system piping.

Input Parameters

Results

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Max Hanger Spacing
ft
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Minimum Hangers Required
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Pipe Weight (water-filled)
lb/ft
Note: Hanger spacing must not exceed NFPA 13 Table 9.2.1.1 values. Additional hangers are required within 12 inches of each fitting change of direction. Trapeze hangers may be used for parallel branch lines. Seismic bracing is separate from support hangers.

Reference

NFPA 13 Table 9.2.1.1 - Maximum Hanger Spacing: Steel: 1"-2.5" = 12 ft, 3"-8" = 15 ft Copper: 3/4"-1.25" = 8 ft, 1.5"-2.5" = 10 ft, 3"-8" = 12 ft CPVC: 3/4" = 5.5 ft, 1" = 6 ft, 2" = 8 ft, 3"-8" = 10 ft Min hangers = ceil(run length / spacing) + 1