What is a "sheave" in the context of rigging?

A sheave is specifically defined as a wheel used in pulleys that facilitates the change in direction of a rope or cable. This component is essential in rigging systems because it allows for efficient transmission of force when lifting or moving loads. By redirecting the load's path, sheaves can help distribute weight more effectively, lessen the required effort, and provide greater control over how different loads are handled.

Sheaves are commonly found in applications involving cranes, hoists, and other lifting machinery. Their use is fundamental in rigging because they can greatly improve mechanical advantage and reduce friction, ultimately enhancing the safety and effectiveness of lifting operations. Understanding the role of a sheave in rigging is critical for professionals in the field, enabling them to utilize these parts effectively for various lifting applications.