Attachment Efficiency

Nominal Efficiency
Percent of Catalog
Rated Rope Strength
%

Wire Rope Sockets

Poured Attachments

Spelter, Zinc or Resin

100

Fittings (Swaged or Pressed)

Reg. Lay, IWRC
Reg. Lay. Riber Core

95-100
92

Flemish-eye and Swaged (with or without thimble)

1/4" thru 1" (IWRC Rope)
1/4" thru 1" (Fiber Core Rope)
1-1/8" thru 1-7/8" (IWRC Rope)
1-1/8" thru 1-7/8" (Fiber Core Rope)
2" and larger (IWRC Rope)
2" and larger (Fiber Core Rope)

95
92.5
92.5
90
90
87.5

Clips (U-Bolt and Twin-Base types)

Number of Clips vary with rope size

Wedge Sockets

Depending on Design

70-90

Spliced-In Thimbles:

1/4" and smaller
5/16"
3/8"
7/16"
1/2"
5/8"
3/4"
7/8" thru 2 1/2"

90
89
88
87
86
84
82
80

Safeline Clamps

Knot and Clip (Contractors Knot)
"Not Recommended"

85-90

50