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e.g. 6x36 Wire Rope
6x25+IWRC Wire Rope | Classification
Wire ropes can be classified into single layer, multilayer or rotation-resistant types.
Construction
A wire rope's construction is given by the number of strands, number of wires in those strands and the type of core that it may have. Regardless of the rope type, the nomenclature is always the same:
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The first number indicates the number of strands. |
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The "x" sign is pronounced as "by". |
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The second number indicates the number of wires in each strand. |
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The "+" sign separates the strands from the core. |
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The core is expressed as an abbreviated word, e.g. IWRC. |
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Left Lay REGULAR LAY
Left Lay LANG LAY | Rope Lay
The direction of lay refers to the direction of the helical twist i.e. the direction that the strands have been laid up over the core. A rope can be either Right Hand (RH) or Left Hand (LH).
The type of lay refers to the way in which the wires and the strands have been laid up, with reference to one another.
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Ordinary lay ropes have the wires laid up in the opposite
direction to the strands. |
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Lang's Lay ropes have the wires and strands laid up in the
same direction. |
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Alternate lay is a combination of Ordinary and Lang's lay and is
found only in some sixstranded ropes. |
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Rotation Resistant & Non Rotation Resistant
Non rotation resistant ropes comprise of a single layer of strands over the core. The outer strands and core are closed in the same direction. These ropes are applied at very short lifting heights.
Rotation resistant ropes have two layers of strands closed over the core, and
each layer will be closed in opposite directions. These ropes have moderate rotation resistance and can be used for medium lifting heights.
Low rotation ropes have three or more layers of strands covering the core, the outer layer closed in the opposite direction to the layers below it. These ropes can be used for extreme lifting heights. |
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