Use the Line Sag Calculator to determine the sag, tension, and deflection of a suspended line or cable. Corning Cable Systems routinely specifies maximum span lengths, vice ruling span, for given sag and environmental conditions. Cable size and type - This includes cable type, cable diameter, weight, strength member type and location, armoring (if used), and fiber count. SpanMaster software takes the user through a logical step-by-step process of information entry and produces sag. 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. This calculator uses SkyCiv's powerful FEA technology to iteratively work through different prestress forces to. SAG10 is one of the world best software products for overhead power and telecom lines cables, ground wires and phase wires sag and tension calculation. Its operation based on nonlinear graphical method invented by ALCOA (American aluminum industry leader) at 1926 which analyze cable behavior during. And if a finger pressing on the fibre can disrupt the light signal, imagine what a backhoe can do to an optical fibre cable! As a humourous aside, you may like to read Fred Lawler's “ The 10 Most Bizarre and Annoying Causes of Fiber Cuts. Includes geometric sag, cable tension.