On what basis are replacement criteria for steel wire rope determined?

Replacement criteria for steel wire rope are determined based on the worst possible conditions. This is essential for ensuring safety and reliability in elevator systems. When assessing the service life and potential replacement needs of steel wire rope, it is crucial to consider the most adverse operating environment the rope may encounter. Factors like excessive wear, environmental conditions (such as moisture, corrosion, and temperature fluctuations), and the applied loads all play a significant role in the rope's deterioration.

By establishing criteria based on worst-case scenarios, technicians can proactively manage the integrity of the wire rope, preventing failures that could lead to accidents or operational inefficiencies. This rigorous approach ensures that elevator systems remain safe over their working life, accommodating any unforeseen stresses or strains that might occur during operation. Hence, the focus on worst possible conditions provides a conservative and responsible standard for replacement criteria.