What is a fixed device used for attaching a hoist to the bottom of a beam?

The correct choice is the beam clamp, which is specifically designed to secure a hoist at the bottom of a beam. A beam clamp provides a reliable and safe attachment point, allowing the hoist to operate effectively while ensuring stability during lifting operations. It acts as a fixed device that can be easily affixed to a structural beam, accommodating varying beam sizes and shapes, which makes it a versatile option in rigging applications.

Hoist rings, saddle blocks, and swivel hooks serve different functions in lifting and rigging scenarios. Hoist rings are typically integrated into loads to provide a secure lifting point and do not attach directly to beams. Saddle blocks are generally used to guide or support hoisting lines rather than serve as an attachment point. Swivel hooks are designed to allow for rotation of the load, enhancing maneuverability during lifting but are not intended as a fixed attachment to beams. Hence, the beam clamp stands out as the appropriate device for this specific application.