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.

Portalna dizalica s jednom gredom uglavnom se sastoji od mosta (glavne grede), četiri potpornja, donje grede, pogonskog uređaja za kolica, električne kontrole, električne dizalice itd. Okvir mosta (glavna greda) portalne dizalice s jednom gredom općenito je konstrukcija u obliku kutije zavarena čeličnim pločama. Donji dio glavne grede opremljen je tračnicom I-grede za rad električne dizalice. Također se može koristiti za glavnu gredu portalnih dizalica velikog raspona koji rade na otvorenom. Konstrukcija rešetke oblikovana zavarivanjem čeličnih profila ima jaku krutost (osobito horizontalnu krutost), malu težinu, malo područje na vjetru i ima velike ekonomske koristi. Međutim, proizvodnja i zavarivanje ove konstrukcije je kompliciranija i teža od konstrukcije u obliku kutije.

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.