According to ASME B30.3, under what condition should rotation resistant wire rope be removed from service?

The guideline provided by ASME B30.3 regarding the removal of rotation resistant wire rope from service emphasizes the importance of maintaining the integrity and safety of the lifting equipment. The correct condition for removing rotation resistant wire rope is when there are two broken wires randomly distributed.

This criterion is crucial because broken wires can significantly weaken the rope's structure and affect its performance under load. Randomly distributed broken wires indicate a broader issue with the rope's integrity, as it suggests not just localized wear or damage but a potential systemic failure that could lead to catastrophic results if left unaddressed.

In contrast, conditions such as having a specific number of broken wires within a defined section (such as within a certain rope diameter or area) do not adequately capture the risk of failure related to the condition and distribution of the wire breaks. Two broken wires scattered throughout the rope present a greater concern than simply counting how many broken wires exist within a specific section without considering their distribution across the rope's length. This is why the criterion for random distribution provides the necessary safety margin to prevent potential accidents during crane operations.