5 ton 10 ton suspended double girder crane for sale

Portal crane (also known as gantry crane) is a bridge-type crane whose bridge is supported on ground rails by legs on both sides. Structurally, it consists of a gantry, traveling mechanism for the crane, lifting trolley, and electrical components. Some portal cranes have legs on only one side, while the other side runs on a support in a factory or trestle, known as semi-portal cranes. The gantry of a portal crane is composed of the upper bridge (including main girder and end carriages), legs, lower crossbeam, and other parts. To expand the working range of the crane, the main girder can extend beyond the legs to one or both sides, forming an overhang. Cranes with jib trolleys can also be used to expand the working range through jib luffing and rotation.

Portal cranes are a deformation of bridge cranes, also called gantry cranes. They are mainly used for loading and unloading operations in outdoor freight yards, material yards, and bulk cargo areas. Portal cranes have high yard utilization, large working range, wide adaptability, and versatility, and are widely used in port freight yards. Its metal structure resembles a door-shaped frame, with two supporting legs installed under the承载 main girder, allowing it to run directly on ground rails. The ends of the main girder can have extending overhanging beams.