A comparison of typical wire rope lays: 1) right regular lay, 2) left regular lay, 3) right lang
lay, 4) left lang lay, 5) right alternate lay.
Wire rope nomenclature also defines: length, size (i.e., diam.), type, direction of lay, grade
of rope, type of core and whether it is preformed (p/f) or non-preformed (np/f.) If the
direction and type of lay are omitted from the rope description, it is presumed to be right
regular lay. In addition, if no mention is made as to preforming, this will be presumed as a
requirement for preforming. On the other hand, an order of elevator rope requires an
explicit statement since p/f and np/f ropes are used extensively. An example of a complete
description would appear thus:
RT500
Applicable Standards / Regulations
288 REVISED:
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