Gantry Cranes: Also known as overhead traveling cranes, they are a variant of bridge cranes, primarily used for loading and unloading operations of cargo, materials, and bulk goods in outdoor yards and quarries. Their metal structure resembles a gate frame, with two support legs mounted under the main beam, allowing them to travel directly on ground tracks. The main beam ends can feature cantilever beams, which give the gantry crane high site utilization, a large working range, wide adaptability, and strong versatility.