Calculator
Pipe Support Spacing Calculator
Calculate the maximum allowable pipe support spacing from pipe size, material and a deflection limit — to prevent sagging, stress and joint failure.
Interactive toolUpdated July 2026
Inputs
Water 1000, empty/air 0.
Typical limit 3 mm or span/300.
Results
Max Support Span
4.91 m
Carbon Steel, 114.3×6 mm, 1000 kg/m³ fluid
L = (384·E·I·δ / 5w)¼ · load 237.8 N/m
How It Works
L = ∜(384·E·I·δ / 5w)
Simply-supported beam under uniform load (pipe + contents weight), deflection-limited. I = second moment of area of the pipe ring; w = weight per metre × g. Concentrated loads (valves, branches) reduce the allowable span.