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Double Girder Bridge Crane with Carrier-beam mainly consists of bridge, crane traveling mechanism, trolley, electric equipment and electromagnetic chuck. When used, the rotary part of the hanger of electromagnetic disk must be locked up with screws and no rotation is allowed.
This type crane is heavy duty type with working duty is A6~A7, crane lifting capacity includes the dead weight of magnetic lifters.
link:http://www.chinacranemanufacturer.com/steel-mill-crane/steel-mill-overhead-crane/double-girder-bridge-crane-with-carrier-beam.html
QL Double Girder Bridge Crane With Carrier-Beam Used In Steel Mill