FAQ >> Wire rope in crane

Wire rope in crane

Wire rope is made of steel wires laid together to form a strand. These strands are laid together to form a rope, usually around a central core of either fiber or wire, as indicated above. IWRC is the abbreviation for independent wire rope core. This wire core, which is actually another strand, has several advantages over fiber core. It adds about 1% in strength and helps to resist rope crushing Fiber core is impregnated with lubricant which is released during use. Fiber core also help to cushion the strands during use. Fiber core wire rope should not be used For hoisting or rigging.

Most wire rope is made from preformed strands. The preforming gives the the stands a better load distribution, and it prevents unraveling when the rope is cut. The number of strands, number of wires per strand, type of material and nature of the core will depend on the intended purpose of the wire rope.

Wire Rope Lays:

The lay refers to the direction of the winding of the wires in the strands and to the strands in the rope. This term refers to two basic lays. Regular Lay and Lang Lay.

Regular Lay: The wires in the strands are laid in one direction while the strands in the rope are laid in the opposite direction. The wires are able to withstand considerable crushing and distortion due to the short length of the exposed wires.

Lang Lay: The wires in the strands and the strands in the rope are laid in the same direction. Lang Lay rope should not be used for single part hoisting due to its tendency to untwist. Its biggest advantage is its resistance to abrasion.

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