Practical Wire Rope Information and Useful Information on the Drag-Line Cableway Excavators (Classic Reprint)

Excerpt from Practical Wire Rope Information and Useful Information on the Drag-Line Cableway Excavators

Wire Rope is made of wires, either twisted together or laid parallel to each other. The first mentioned is in general use for hoisting, conveying and power-transmission; the other is used only on the large suspension bridges.

Ropes differ in respect to their construction as follows: (1) their cross-section being flat or round; (2) the number and shape of the strands; (3) the number, size and shape of the wires in the strand; (4) the lay of the wires with respect to the lay of the strand.

Flat wire ropes consist of a number of wire strands which have been laid side by side and sewed together with annealed wire.

Round wire ropes are made up of a number of wire strands twisted around a core of hemp or around a wire strand.

The standard wire rope is made of six wire strands laid up around a hemp core.

The wire strands are laid around the core either to the right or to the left and the rope is thereby designated as right lay or left lay. The twist or lay of strand may be long or short. The shorter twist forms the more flexible rope; the longer twist the more rigid rope.

When the strands and wires composing same are twisted or laid up in the same direction, the rope is known as Lang lay.

The Tiller Rope is made up of wire ropes which in turn are made up of wire strands. These wire ropes are laid around a hemp core, resulting in a very flexible rope.

The wire strands are made of wire twisted together. The number of wires commonly used are four, seven, twelve, nineteen and thirty-seven, all depending upon the nature and condition of the work for which it is intended.

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