When should wire rope be removed from service?

Wire rope should be removed from service when it is reduced by more than 10% in diameter. This criterion is essential because a reduction in diameter directly affects the tensile strength and load-bearing capacity of the wire rope. As the diameter decreases, the ability of the wire rope to safely support loads diminishes significantly, which could lead to failure and pose safety hazards for technicians working with the equipment. Regular inspections are crucial, and any observed reduction in diameter beyond this limit indicates that the rope has likely experienced wear or damage that compromises its integrity.

Acknowledging the other options, while a reduction of 5% in diameter is certainly a concern and requires attention, it is not the definitive threshold for removal from service as prescribed by industry standards. Surface rust can be a sign of deterioration, but it does not automatically necessitate removal unless it impacts the wire rope's performance and structural integrity. Additionally, while stiffness indicates potential issues, it is not solely a reason for removal, unless it affects usability and safety in conjunction with other factors. Thus, adherence to the 10% diameter reduction guideline helps ensure safety and reliability in using wire ropes in telecommunications tower work.