Gantry cranes are used in various industries for numerous applications. While most often observed removing shipping containers from cargo ships, smaller versions called portable or mobile gantry cranes are used in many warehouses and material handling facilities. Ideal for hoisting machinery, equipment, or other heavy loads, gantry cranes are either on wheels or attached to a fixed set of rails. Wheeled gantry cranes can maneuver through aisles with ease, requiring less room than a forklift.