Wire ropes on cranes are wear parts with a safety function. They are inspected regularly and replaced as soon as they reach the discard criteria.
When a rope is replaced
ISO 4309 describes the discard criteria: visible wire breaks over a reference length, decrease in diameter, corrosion and deformations such as birdcaging or kinks. The operator sets inspection intervals according to use and requirements.
A replacement rope must match the crane in diameter, construction, core, lay type and rope grade. For high lifting heights, rotation-resistant ropes are used. Sheaves and drum should be checked as well: if the groove is worn, the new rope also wears quickly.
What a request for a crane rope should contain
- rope diameter and length
- construction, core and lay type
- rope grade and surface, for example galvanised
- end terminations such as wedge socket or ferrule
- details from the crane log book or rope certificate
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