The gantry crane is a piece of lifting equipment with a metal structure in the form of a door-shaped frame. The main beam is equipped with legs below it, which can move along the ground track. It is widely used for loading and unloading operations in open cargo yards, docks, railway freight stations, etc. Its structure is a variation of the bridge crane, but it comes with its own legs and does not rely on the load-bearing capacity of the factory building. It is suitable for large-scale outdoor operations.