Single-girder cranes usually refer to single-girder bridge cranes. The main girders of electric overhead traveling crane bridges mostly use I-shaped steel or a combined section of steel and steel plates. Lifting trolleys are often assembled with chain hoists, electric hoists or hoists as lifting mechanism components.

Bridge cranes can be divided into single-girder and double-girder bridge cranes according to their categories.

General bridge crane General-purpose bridge cranes are bridge cranes that work in general environments, and their pick-up devices are hooks or grabs or lifting electromagnets (electromagnetic chucks), or two or three of them are used at the same time

Insulated Bridge Cranes Insulated bridge cranes refer to cranes that work in the environment of smelting workshops of non-ferrous metals such as electrolytic aluminum, magnesium, lead, zinc, and copper.

Gantry crane is a deformation of bridge crane, also known as overhead gantry crane. It is mainly used for loading and unloading operations of outdoor cargo yards, material factory cargo, and bulk cargo.

Heavy duty gantry crane is a type of bridge crane, with single girder and double girder types. The main girder is supported by two brackets. It is mostly used for outdoor operations and moves on wheels, rails or rail systems.