Catenary Design Calculator
Design overhead catenary system parameters: messenger wire sag, contact wire height, wind deflection, dropper count, and electrical clearances.
Inputs
ft
lbs
lbs
ft
mph
kV
Results
Messenger wire sag
21.3 in
Messenger wire sag1.77 ft
Messenger height at support21.77 ft
System height at support3.77 ft
Wind deflection3.1 in
Deflection within limit1
Droppers per span12
Recommended pre-sag1.5 in
Min electrical clearance31 in
Span classification1
How to Use This Calculator
- Enter Span length, Messenger wire tension, and Contact wire tension.
- Set Contact wire height, Design wind speed, and System voltage.
- Review the Messenger wire sag (in) result.
- Use Messenger wire sag (ft) and Messenger height at support (ft) to inform your decision.
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