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 wheels than four, must be balanced hinged frame means that the crane load is evenly distributed on each wheel. Bridge metal structure from the main beam and side beams, divided into single girder bridge and two double-girder bridge. Single girder bridge by a single span girders and located on either side of the end beam composed by two double-girder bridge girders and end beam components. Main beam and side beams rigidly connected at both ends of the end beam which wheels to run on an elevated bridge support. The main beam welded track for lifting the car running. The main beam of the bridge structure type more typical box-shaped structure, four truss structure and fasting truss structure. Box-shaped structure can be divided into two-track box girder, double girder off-track box, off-track box single girder several. Double track box girder is a widely used basic form, the main beam from the vertical web of upper and lower flange plates and sides of the composition, the car rails disposed on the flange plate on the center line, simple structure, Manufacturing convenient single and double girder crane maintenance, suitable for mass production, but larger self. Partial rail box and section single girder Partial rail box double beam are made on the lower flange plates and unequal thick web of primary and secondary explosion composition qb double girder cranes, trolley rails disposed above the main web, cabinets short stiffener may be omitted, in which the off-track single girder box is a box girder flange width instead of two main beam, the smaller the weight, but the manufacturing is more complex. ⑴ during operation, if there is an abnormal sound heard, should immediately stop off for inspection, lifting objects as sound down. ⑵ working crane double girder crane remote control, encountered a sudden power failure or line voltage drops sharply, as soon as possible to each controller back to zero, cutting off the power switch, and inform commanding officers. When ⑶ lifting mechanism brake suddenly failed in their work, be calm, if necessary, turn the controller in low-speed dual-beam cranes, do slow down movement repeatedly, while starting the cart or car, choose a safe area, put the weight ; ⑷ When the idea of ??the command staff and the driver signaled inconsistent interrogation signal should be issued, confirmed that no problem can be operated. ⑸ while driving out of control, should fight anti-vehicle according to the situation or press the emergency stop button. (6) rotating baskets, baskets spreader not touch. qc electromagnetic double girder cranes, generous heavy (certified), Jurong double girder crane provided by generous heavy machinery Co., Ltd., Henan Province. Heavy Machinery Co., Ltd., Henan Province, generous (www.hnqizhongshebei.com) (www.hnqizhongshebei.com) is Zhengzhou, engineering, construction cranes leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum Limits to meet customer needs. In heavy generous leadership with the staff warmly welcome all inquiries negotiations to create a better future for heavy generous.