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The beam lifting crane machine is a kind of gantry crane specially designed for bridge construction. The beam is mainly composed of assembled main girders, legs and cranes. The components are connected with high-strength bolts and easy to disassemble and transport. Compared with ordinary gantry cranes, the installation is convenient, economical and practical. Applicable to the frequent flow of road bridge construction units.
link:http://www.chinacranemanufacturer.com/gantry-crane/double-girder-gantry-crane/electric-control-450t-beam-lifting-gantry.html
Electric Control 450t Beam Lifting Gantry Crane For Railway