What is the maximum allowance for broken wires in a rotation resistant wire rope?

The correct choice reflects the industry standards for the inspection of rotation-resistant wire rope, which is critical for ensuring safe crane operations. Rotation-resistant wire ropes are designed to minimize twisting and rotation during lifting operations, making their integrity crucial.

The maximum allowance for broken wires is specified as four randomly broken wires within a span of 30 rope diameters. This standard comes from the need to maintain a robust safety margin while also allowing for some wear and damage over time. It is important to monitor the condition of the wire rope regularly, and the specified tolerance for broken wires helps define the threshold at which the rope should be replaced to prevent failures during operation.

Understanding this limit is essential for crane operators and maintenance personnel, as adhering to specified safety standards helps ensure the reliability and performance of rigging equipment, ultimately contributing to job site safety.