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.

Kren gantri rasuk tunggal terutamanya terdiri daripada jambatan (rasuk utama), empat cadik, rasuk bawah, peranti pemacu kereta, kawalan elektrik, angkat elektrik, dll. Rangka jambatan (rasuk utama) kren gantri rasuk tunggal secara amnya struktur berbentuk kotak yang dikimpal oleh plat keluli. Bahagian bawah rasuk utama dilengkapi dengan trek I-beam untuk operasi angkat elektrik. Ia juga boleh digunakan untuk rasuk utama kren gantri rentang besar yang berfungsi di luar rumah. Struktur kekuda yang dibentuk oleh kimpalan keluli bahagian mempunyai kekakuan yang kuat (terutamanya kekakuan mendatar), ringan, kawasan angin kecil, dan mempunyai faedah ekonomi yang tinggi. Walau bagaimanapun, pengeluaran dan kimpalan struktur ini adalah lebih rumit dan sukar daripada struktur berbentuk kotak.

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.