​Wire Rope Construction

wire rope construction
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​Wire rope Size/Diameter

The correct diameter of a wire rope is the diameter of a circumscribed circle that will enclose all the strands. It is the largest cross-sectional measurement as shown below.                  

wire rope size

The illustration below shows the correct and incorrect methods of measuring a wire rope’s diameter.                                                                                                                                                                                                        

wire rope size diameter


NOTE: Wire rope is normally made slightly larger than its catalogue (or nominal) size. HAMMA has a manufacturing tolerance of +/- 5% on most products.                                                                                                                                                                                                        
Lay Length

The majority of wire rope used is right lay, regular lay. This specification has the widest range of applications. In fact, other lay specifications are

considered exceptions and must be requested when ordering.

Finally, “lay length” is the length along the rope that a strand makes one complete spiral around the rope core.

The lay length is important to the quality of the wire rope - the longer the lay length, the less material that is on the wire rope. This ultimately results in the wire rope work-hardening much sooner, resulting in a shorter working life.


Wire Rope Lays

“Lay” of a wire rope is simply a description of the way wires and strands are placed during construction.

“Right lay” and “left lay” refer to the direction of the strands.

Right Lay

The strand passes from left to right across the rope.

Left Lay

Left lay means just the opposite, strands pass from right to left.

“Regular lay” and “lang lay” describe the way wires are placed within each strand.

Regular or Ordinary Lay

Wires that are wound in the opposite direction of the strand is a regular lay.

Lang Lay

Wires that are wound in the same direction as the strand is a lang lay.

Alternating Lay

consists of alternating regular and Lang lay strands.

wire rope lang lay