A single-girder crane, as the name implies, has only one beam, and the electric hoist is directly hung upside down on the track just below the beam. The double girder crane has two parallel beams, and the electric hoist is mounted on the trolley, and the trolley is placed on the track above the beam. The single-girder crane is mainly composed of electric hoist, metal structure, cart running mechanism, feeding device and electric device. It is a kind of light and small lifting equipment, running on the I-beam track, with electric and manual points, heavy objects. Hanging on it is relatively simple and has many applications. Double girder cranes generally refer to double girder bridge cranes, English name: Dual-beam Crane. Double girder cranes generally consist of three major parts: mechanical, electrical and metal structures. The outer image of the overhead crane is a single-span slab bridge supported by two ends supported on two parallel overhead rails. Double-beam cranes are widely used in indoor and outdoor industrial and mining enterprises, steel and chemical industry, railway transportation, port terminals and logistics turnover.
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