Wire Rope Sockets Nominal EfficiencyPercent (%)of Catalog Rated Rope Strength

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

 80%

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%