What do wire rope strands wrap around?

Wire rope strands can wrap around different types of cores that provide support and structure to the rope. The Independent Wire Rope Core (IWRC) is a robust core made entirely of wire, which enhances the rope's strength and flexibility. A fiber core, on the other hand, is typically made from material such as sisal, manila, or synthetic fibers, and provides good support but may not offer the same strength as an IWRC.

When wire rope strands are wrapped around both IWRC and fiber cores, it allows for enhanced load-bearing capabilities and flexibility. This is particularly important in applications where the wire rope is subject to bending and movement, as the core type can influence the durability and performance of the wire rope in various conditions.

The option indicating both IWRC and fiber core captures the essence of the versatility in wire rope construction, as it acknowledges that different types of cores can be utilized depending on the specific requirements of the application. This is vital knowledge for an apprentice lineman, as selecting the appropriate type of wire rope can significantly impact safety and performance in the field.