August 21st, 2019

Wire Rope End Termination : Explained

Wire Ropes are usually shipped with seized ends or attached fitting to facilitate easy loading. These end terminations allow the operator in the attachment of load to perform the lift. The entire sling or wire rope assembly is as strong as its weakest link, which makes the end terminations all the more important. Thus, the end termination can pose as a limiting factor to the safe working load (SWL) granted over an entire sling or lifting assembly.

Wire seizing is a method of binding the individual wire rope components using a thin wire filament. This procedure facilitates better handling during operation that involves preparing and cutting of wire rope. This method helps maintain the lay length and lowers the chances of wires opening up during operation. Standard preformed ropes require a single seizing while lower preformed ropes require two or more seizing.

There are two techniques of wire rope seizing:

Technique 1:

  • Wind the soft wire across the rope for a distance equal to the rope diameter. The wounds must be parallel and in proximity to each other with sufficient tension between them
  • Twist the ends to tighten up the slack
  • Cut off the excess wire and gently pound the knot snugly against the rope

Technique 2:

  • Tuck the soft wire between the strands of the wire rope. Wrap the wire neatly around the wire rope in subsequent wraps that are in line with each other.
  • Twisting the ends to tighten up the slack.
  • Cut off the excess wire and gently pound the knot snugly against the rope

Operators must ensure the use of wire rope and slings with end terminations proof tested by a certified equipment manufacturer. The personnel must possess adequate training and specific knowledge to ensure stronger end treatment. Consult the wire rope manual for detailed instructions and safety practices.


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