The term flexibility is frequently thought of as being synonymous with resistance to bending
fatigue. This is not true. Flexibility refers to the capability of flexing or bending. While a high
degree of fatigue resistance may sometimes accompany the flexibility characteristic, it
does not necessarily follow that this is so. A fiber core rope, for example, is more flexible
than an IWRC rope. Yet, when the IWRC rope is bent around undersize sheaves at
relatively high loads, it will usually perform better than the more flexible fiver core rope. The
reason for lies in the ability of IWRC rope to retain its roundness nd freedom of internal
movement. Under the same conditions, a fiber ore rope will flatten and inhibit free internal
adjustment, thereby leading to early failure.
RT500
Applicable Standards / Regulations
312 REVISED:
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