Overhead crane works

bridge gantry crane mainly electric drive, usually operated in the cab, there are remote control. From the weight of up to 500 tons, span up to 60 meters. Great starting weight of single girder bridge cranese for ease of installation and adjustment, the driving device often used universal coupling. Crane agency generally only four driving and driven wheels, if great weight, increase common approach from the wheel to reduce the wheel pressure. When the wheel more than 4, it must adopt a balanced hinged frame means that the crane load is evenly distributed on each wheel.