How many broken wires must be present in one strand of wire rope for it to be removed from service?

A wire rope is a critical component in lifting operations, and its integrity is essential for safe operation. When assessing the condition of wire rope, particularly in terms of broken wires, the exact threshold for removal from service is crucial. If three broken wires are found in one strand of a multi-strand rope, it indicates significant wear and potential compromise of the rope’s strength.

The rationale behind the threshold of three broken wires lies in the design and performance characteristics of wire ropes. Each strand contributes to the overall load-bearing capacity, and excessive broken wires can lead to uneven load distribution, reduced strength, and increased risk of failure. This specific benchmark ensures that ropes are only removed from service when there is a clear indication that their safety and performance are compromised.

While the presence of fewer broken wires may not immediately pose a risk, they can be indicative of wear that, if left unchecked, could lead to more severe issues. Hence, monitoring wire rope for any broken wires is critical to maintaining safety standards in lifting operations.