Oversize Limits of Wire Rope Diameters*

Nominal Rope Diameter Allowable Limits
Thru 1/8″ (3.2mm) -0             +8%
Over 1/8″ (3.2mm) thru 3/16 (4.8mm) -0             +7%
Over 3/16″ (4.8mm) thru 5/16 (8.0mm) -0             +6%
Over 5/16″ (8.0mm) and Larger -0             +5%

*These limits have been adopted by the Wire Rope Technical Board (WRTB). In the case of certain special purpose ropes, such as aircraft cables and elevator ropes, each has specific requirements. If a question should arise regarding compliance with oversize tolerances, the rope may be measured under tension of not less than 10% nor more than 20% of the nominal strength.

Fig. 17

Design specifications for wire rope are such that the diameter is slightly larger than the nominal size, according to the allowable tolerances shown in the Table below.