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Underhung overhead or bridge cranes are a good choice for factories and warehouse facilities that want to free floor space of obstructions and improve safety and productivity. Underhung cranes—sometimes referred to as under-running cranes—do not require supportive floor columns. This is because they typically ride on the lower flange of a runway beam suspended from the facility roof or rafters.
By optimizing end approaches, underhung overhead cranes make the most of facility space. That is, they allow the hoist to get closer to the end truck or end of the runway than is possible with a top-running crane. The underhung configuration also maximizes the bridge end approach, or how close the bridge girder can get to the wall or the end of the runway.
As their beams are suspended from building roofs, underhung overhead cranes are limited in lifting capacity—usually 10 tons or less. Before choosing an underhung crane you should have the structural strength of your facility’s roof evaluated. Supporting beams can be added to permit increased load capacity.
Konecranes sales professionals can help you explore all available crane options and choose the one best suited to your application and facility. They also can advise you on maintenance programs to keep your cranes operating at peak efficiency and reliability.