A gantry crane is a type of overhead crane that is supported by freestanding legs and typically moves on wheels or a track. It is widely used for lifting and transporting heavy loads in industries such as construction, shipyards, and warehouses. Gantry cranes are available in various types, including single girder, double girder, semi-gantry, and adjustable height cranes, each suited for different applications and capacities. The main benefits of gantry cranes include flexible installation, high lifting capacity, cost-effectiveness, and space-saving design.