Steel wire and chain
It is called as independent wire rope core (IWRC). The other type of wire core is a wire strand structure (WSC or SC). This consists of multiplewire strand and may have the same construction as the main rope strands. A wire rope is made of strands and each strand is made up from one or more layers of wires. The number of strands means the number of group of wires laid over the central core (Fig. 12.1).