R 1y = R 2y = vertical support forces (lb, N) The vertical support forces at the end of the cable can be calculated as Q = unit load ( weight) on the cable (lb/ft, N/m) ![]() R 1x = R 2x = horizontal support forces (lb, N) (equal to midspan lowest point tension in cable) The cable follows the shape of a parable and the horizontal support forces can be calculated as ![]() Uniformly Loaded Cables with Horizontal Loads The equations below can also be used for cables only loaded with their own weight as long as the sagging height (h) vs.
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