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Catenary Curve Graph and Expanded Excel Calculator
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Catenary Curve Calculator and Expanded Excel Design Equation and Calculator
A catenary is the curve that an idealized hanging chain or cable assumes under its own weight when supported only at its ends in a uniform gravitational field.
The catenary curve has a Ulike shape, superficially similar in appearance to a parabola , which it is not. The curve appears in the design of certain types of arches and as a cross section of the catenoid  the shape assumed by a soap film bounded by two parallel circular rings.
This web based calculator will create a Catenary Curve graph and table of data points.
Eq. 1
The Excel spread calculator calculates the loading on a cable that might be utilized for a zip line, bridge suspension and lifting apparatus.
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Download: Catenary Curve Calculator and Expanded Excel Calculator
The excel application and analysis does not include the effects of:

wind

rain

snow

ice

sunlight and ultraviolet radiation

birds and animals

contact with trees

elasticity of the cable

expansion or contraction due to temperature

vibrations induced into the cable

slow degradation of the cable

rapid degradation of the cable

degradation of the cable before you received it

degradation of the cable during construction handling and mishaps

degradation of the cable because of fittings that are tightened onto the cable

Warning: Wire Rope Cables, Ropes and Chain may be subject to all of the above effects.

A catenary that looks good on the first day of construction may fail at a future time because of these effects. You may be responsible for not considering all degradation and future effects if the catenary fails in the future!
This analysis is not for a marine catenary in water.
Notes on attaching additional loads to a catenary:

For example, a hose transporting water is attached to a cable catenary.

The load should be attached to the cable either continuously, or attached at many equally spaced points, so that the cable continues to look like a catenary.

In the following three cases, a catenary analysis may or may not be acceptable, depending on how much the cable deviates from being a true catenary.

If the load is attached to the cable at only a few points, the cable is no longer a catenary.

If the load is a significantly different length than the cable, the cable is no longer a catenary.

If the load is not equally distributed to the length of the cable, the cable is no longer a catenary.
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