A semi gantry crane is a gantry crane with one leg running along a ground track while the other end of the bridge is supported by a truck running along an overhead track.

Semi gantry cranes, with their unique structure and practicality, have become an indispensable member of modern industry. It is particularly suitable for light and medium-duty lifting tasks, such as cargo loading and unloading, machine equipment maintenance, various applications in docks and factories, etc.

The single beam gantry crane is mainly composed of a bridge (main beam), four outriggers, lower beam, cart drive device, electrical control, electric hoist, etc. The bridge frame (main beam) of a single-beam gantry crane is generally a box-shaped structure welded by steel plates. The bottom of the main beam is equipped with an I-beam track for electric hoist operation. It can also be used for the main beam of large-span gantry cranes working outdoors. The truss structure formed by welding of section steel has strong stiffness (especially the horizontal stiffness), light weight, small windward area, and has high economic benefits. However, the production and welding of this structure is more complicated and difficult than the box-shaped structure.

Semi-gantry crane is suitable for lifting, transporting, loading and unloading in open-air working places such as stations, docks, warehouses, construction sites, cement product yards, machinery or structural assembly yards, power stations, etc. It is also suitable for working in indoor workshops.

The jib of a crane is an extension or an arm that protrudes from the main body of the crane. It is an important component that enhances the crane's reach and lifting capabilities.

Jib cranes, also known as swing cranes, are versatile lifting devices widely used in various industries.