Which of the following items are typically used for heavy rigging?

The use of slings, shackles, and a spreader beam is integral to heavy rigging, making this choice the best option. Slings are fabric or metal straps that securely lift and move heavy loads by distributing weight. Shackles connect slings to hoisting equipment and provide a strong point of attachment. A spreader beam is a type of rigging device that helps to stabilize and evenly distribute the load during lifting, reducing the risk of damage or shifting during movement.

In heavy rigging applications, these components work together to ensure safety and efficiency. They allow for proper load distribution, which is essential when handling large, heavy materials in construction or industrial settings. This setup significantly enhances control over the load and prevents accidents, which is why it is standard practice in the field.

The other choices, while related to rigging, often pertain to different aspects of lifting and do not provide the same level of safety and effectiveness for heavy loads.