What is the required design factor for running wire rope that is not rotation resistant?

The correct design factor for running wire rope that is not rotation resistant is 3.5 to 1. This design factor is established to ensure safety and reliability during operations. When wire rope is in use, especially in dynamic applications such as lifting and hoisting, it can be subjected to various forces and stresses that necessitate a higher design factor to account for potential degradation over time and through usage.

Rotation-resistant wire ropes have their own unique characteristics and often can sustain higher loads with lower design factors. However, non-rotation resistant ropes are more susceptible to torsion and can experience more significant wear and fatigue, necessitating the use of a 3.5 to 1 ratio. This higher design factor provides an additional margin of safety to compensate for the lower inherent stability of non-rotation resistant types under load. Therefore, it is critical to understand and apply these design factors accurately to ensure operational safety and prevent accidents related to equipment failure.