The IWRC Structure of the Steel Wire Rope - Part 4

Marking and Identification

The specification and model of the steel wire rope will be clearly indicated by IWRC. For example:

·6x36 WS IWRC: This indicates that the steel wire rope is composed of 6 strands, each containing 36 steel wires, and it adopts the Shiru-type Varnish-Wool composite structure with an independent steel wire core.

·19x7 IWRC: This represents a "non-rotating" steel wire rope, which is formed by 19 outer strands wound around a single IWRC strand and is commonly used for lifting operations.

Summary

IWRC (Independent Steel Wire Core) is a high-performance steel wire core structure. It sacrifices its own weight and rigidity in exchange for higher strength, anti-compression ability, and service life under harsh conditions. When choosing a steel wire rope, whether to adopt IWRC is one of the key decisions that engineers make based on specific working conditions (load, bending frequency, compression degree, temperature, etc.). For the majority of heavy industry lifting and hoisting applications, IWRC has become the standard or preferred configuration.