A(n) ___ is attached to an overhead structure allowing horizontal movement, it becomes a crane.

A hoist is a mechanical device used to lift or lower heavy loads, and when it is attached to an overhead structure, it allows for horizontal movement, thereby functioning as a crane. The primary purpose of a hoist is to raise and lower materials by means of a lifting medium such as a chain, rope, or cable. When utilized in conjunction with an overhead system, it can pivot and move loads across a designated area, which enhances its versatility and functionality similar to that of a crane.

In contrast, while a pulley is involved in lifting and lowering, it does not typically provide the horizontal movement necessary to classify it as a crane. A winch is primarily used to wind and unwind rope or cable, usually for pulling, but it does not provide the same lifting capabilities in a horizontal manner. A lift platform is designed for elevating personnel or equipment vertically and does not inherently involve horizontal movement or load lifting in the same manner as cranes do.