Which of the following items are used for heavy rigging?

The choice of slings, shackles, and spreader beams is particularly suitable for heavy rigging because these components are specifically designed to handle the stresses and loads associated with lifting heavy objects.

Slings are typically made from materials such as nylon or polyester, which provide flexibility and strength, allowing them to distribute the weight of the load evenly and reduce the risk of damage to the object being lifted. Shackles serve as connectors that can join slings to lifting equipment or the load itself, and are engineered to withstand significant forces. Spreader beams are crucial for maintaining stability and balance when lifting large or awkwardly shaped loads, allowing for a wider distribution of weight across multiple points of attachment.

In this context, the other options present components that may not be ideal for heavy rigging due to their limitations in strength, load capacity, or compatibility with heavy lifting scenarios. For instance, while ropes and chain links can be part of a lifting setup, they may not provide the same level of reliability or safety as the specialized rigging gear found in option B.