This process must be performed with precision and exactness to form a strand of correct size and characteristics. The required number of strands are laid symmetrically with a definite length of lay around a core, forming the finished wire rope. Wire rope is identified by its construction, or the number of strands per rope and the number of wires in each strand. Constructions having similar weights and breaking strengths are grouped into wire rope classifications , such as the 6x19 and 6x37 Classes. The term bright refers to a wire rope manufacdtured with no protective coating or finish other than lubrication.
Some applications require more corrosion protection than lubricant can provide.
In these instances, a galvanized finish is provided. The helix or spiral of the wires and strands in a rope is called the lay. Regular lay denotes rope in which the wires are twisted in one direction and the strands in the opposite direction to form the rope. The wires appear to run roughly parallel to the center line of the rope. Regular lay ropes are less likely to untwist or kink and are also less subject to failure from crushing and distortion because of the shorter length of exposed outer wires.