A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also called an overhead crane, gantry crane, or hoist.
The main characteristics of a tire-mounted crane are: its driver's cab and lifting control cab are combined into one unit; it evolved from a crawler crane, replacing the tracks and traveling support of the crawler mechanism with a tire-mounted chassis, overcoming the disadvantage of crawler crane tracks damaging the road surface. It belongs to the category of material handling machinery.
A bridge crane is a lifting device that spans across workshops, warehouses, and material yards for material handling. Because its two ends rest on tall concrete pillars or metal supports, it resembles a bridge. The bridge frame of a bridge crane runs longitudinally along tracks laid on elevated structures on both sides, making full use of the space beneath the bridge frame for material handling without obstruction from ground equipment. It is the most widely used and numerous type of lifting machinery.
