Efficiencies are based on nominal strengths
Method of Attachment Efficiency
Rope with IWRC* Rope with FC**
Wire Rope Socket-Spelter or
Resin Attachment
100% 100%
Swaged Socket 95% (Not established)
Mechanincal Spliced Sleeve
1" dia and smaller 95% 92 1/2%
1 1/8" dia. thru 1 7/8" 92 1/2% 90%
2" dia. and larger 90% 87 1/2%
Loop or Thimble Splice-Hand Spliced (Tucked) (Carbon Steel Rope)
1/4" 90% 90%
5/16" 89% 89%
3/8" 88% 88%
7/16" 87% 87%
1/2" 86% 86%
5/8" 84% 84%
3/4" 82% 82%
7/8" thru 2 1/2" 80% 80%
Loop or Thimble Splice-Hand Spliced (Tucked)(Stainless Steel Rope)
1/4" 80%
5/16" 79%
3/8" 78%
7/16" 77%
1/2" 76%
5/8" 74%
3/4" 72%
7/8" 70%
Wedge Sockets***
(Depending on Design)
75% to 90% 75% to 90%
Clips***
(Number of clips varies with
size of rope)
80% 80%
*IWRC = Independent Wire Rope Core
**FC = Fiber Core
RT500
Applicable Standards / Regulations
302 REVISED:
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