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Right Lay ALTERNATE LAY

Left Lay LANG LAY

Left Lay REGULAR LAY Right Lay REGULAR LAY Right Lay LANG LAY

Wire Rope: Popular Classifications

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The Design Factor being the ratio between the minimum Breaking load of the rope and the working load

limit (WLL) tells at what percentage of its ultimate strength a wire rope is operating. The Design Factor

takes into consideration both normal rope wear and potential stresses in various applications. The best

practice in determining an adequate design factor is to analyze the specific conditions involved in each

individual installation. The following example shows how to determine the Design Factor: If a rope is

working under a max. operating load of 10,000 lbs and is having an ultimate strength of 50,000 lbs the

factor is 5 which means it is operating at 20% of its ultimate strength.

Wire Rope Specifications

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Wire Rope

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NOTE: 6 x 26 WS may be substituted for 6 x 25 FW, 6 x 36 WS for 6 x 41 WS. 9-part Heavy Lift Slings may be substituted forCable Laid.

Definition of Abbreviations

Grade

IPS - Improved Plow Steel

EIPS - Extra Improved Plow

Steel

GIPS - Galvanized Improved

Plow Steel

EEIP - Extra Extra Improved

Plow

DGEIP - Drawn Galvanized

Extra Improved Plow

Construction

FW - Filler Wire

WS - Warrington Seale

SFW - Seale Filler Wire

RR - Rotation Resistant

W - Warrington

S - Seale

Lay

RRL - Right Regular Lay

RLL - Right Lang Lay

LRL - Left Regular Lay

LLL - Left Lang Lay

Core

IWRC - Wire Rope Core

FC - Fiber Core

Fiber - Hemp or

Poly Core

Poly - Polypropylene

Core

SUGGESTED WIRE ROPE FOR PARTICULAR USES

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Criteria For ReplacementOf Wire Ropes

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Rope WearDeterioration and Abuse

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8. Typical wire fractures as a resultof bend fatigue.

9. Wire fractures at the strand, orcore interface, as distinct from

crown fractures, caused by

failure of core support.

10. Break up of IWRC resulting fromhigh stress application. Note nicking

of wires in outer strands.

11. Strand core protrusion as a resultof torsional unbalance created by

drop ball application.(i.e. shock loading).

12. Typical example of localizedwear and deformation created at

a previously kinked portion of rope.

13. Multi strand rope bird-cageddue to torsional unbalance. Typical

of build up seen at anchorage end ofmulti-fall crane application.

14. Protrusion of IWRC resulting fromshock loading.

Rope WearDeterioration and Abuse

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Figuring Reel Capacity

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Sheave and Drum Ratios

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Minimum Sheave- and Drum-GrooveDimensions*