bridge crane

A bridge crane is a type of crane where a beam, known as the bridge, supports the hoisting apparatus. This bridge can move along tracks, often on parallel rails, allowing the crane to cover a large rectangular area. In many cases, the bridge itself is supported at both ends and can travel along these rails, enabling the crane to serve a substantial workspace.12

Bridge cranes are a significant class of cranes used for lifting and horizontally shifting heavy objects. They are distinct from hoists, which are primarily for vertical lifting, and conveyors, which handle bulk materials. The development of modern cranes, including bridge cranes, has been closely tied to the introduction of power sources like steam engines, internal-combustion engines, and electric motors since the 19th century.2