This post is sponsored by Granada Material Handling, the gantry hoist and overhead crane manufacturing innovator servicing domestic UK and EU market. The article focuses on mechanism of gantry cranes and their functioning.
Gantry cranes structure
The bridge crane is a major supporting structure designed to move the trolley that works with overhead loads or lifting devices. Since the mass of the bridge may constitute up to 75% of the total weight of the metal gantry crane and wind loads on the bridge may increase the load up to 85%, the design of the gantry crane for a given object is absolutely crucial.
Bridge structures are different and are selected taking into account specific conditions of the bridge, having the lowest metal content and the easiest to manufacture and assemble. By the number of supporting beams are classified into single and double-girder bridges. Depending on the required width of the served areas and access roads for vehicles with single beam and girder bridges are either console (with one or two consoles) or non-console.
On a number of cranes used in ports, one of the consoles can run the lift to the passage of ships. The height of the bridge girders is determined by the crane consoles. With the length of the console equal to 20-30% of the span, the height of beams equals 8%. When using non-console cranes the height of beams increases by 4-5%. Continue reading “Gantry Cranes Mechanism Ins & Outs” »