The force exerted on a cable as it is dragged around a bend. The longer the pull and the tighter the bend radius, the higher the sidewall pressure will become. High sidewall pressure damages cable. There is a higher chance of destroying cable by high sidewall pressure than by high tensile tension. Electrical cable manufacturers' specifications limit sidewall pressure to a range of 300 - 1500 lbs/ft, depending on cable type. There are three ways to reduce sidewall pressure while pulling cable with bends: shorten the pull, enlarge the bend radius, or use a high performance lubricant. Polywater's Pull Planner 2000 software package automatically calculates sidewall pressure for each segment of a cable pull (a "segment" contains one straight section and one bend). This allows a designer to play "what if," easily changing pull parameters and instantly seeing the affect on sidewall pressure. For a copy of American Polywater's Pull Planner 2000, contact Young & Company