Use the formula: Sag = (weight per foot × span squared) / (8 × horizontal tension). The SkyCiv Cable Sag Calculator (or Cable Deflection Calculator) helps you to determine the prestress forces required to reach a certain cable sag given a particular cable setup. Please use the American standard for number formatting rather than the European standard (i. Understanding the expected mechanical (tensile) loads placed on an aerial installation is important to ensure that safe operating conditions are not exceeded and cable lifetime is not shortened. Calculate sag for spherical and aspheric optics, circular arcs, cable catenaries, or MTB suspension from radius, span, tension, or travel inputs. CommScope's SpanMaster software is a tool designed for use in the calculation of sag and tension of single or multiple cable combinations under various environmental loading conditions.
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