2. box beam using steel plate welded into a box structure, with high security, rigidity and other characteristics. Generally used for large tonnage and large tonnage gantry crane. Such as the right MGhz1200, from the weight of 1,200 tons, is the largest crane gantry crane, the main beam with a box beam structure. Box girder also has high cost, since the major disadvantage of poor wind resistance. 3. Cellular beams are generally referred to as "castellated beams isosceles triangle," the Ends of the main triangle has honeycomb Chengdu cranes, abdominal oblique sides, top and bottom chords there. Cellular beams and joists absorb the characteristics of box girders, compared with larger joist stiffness, small deflection, and higher reliability. However, due to the use of welded steel, the weight and the cost is slightly higher than the joist. Applicable to the use of frequent or large venues or lifting beam field. Because of this beam type is the patented product, thus producing fewer manufacturers. Bridge gantry crane which is mainly used in bridge construction, work is slow, by the door frame, hoist trolley traveling mechanism, cab and electrical control system. Gantry truss structure, with the structure of light, wind resistance and other advantages. Including the main beam, upper beam, the legs, the lower end of the beam, running trolley and walkway railings. Main beam triangular truss structure, laying track above for car along the main beam direction move laterally. Outrigger box or pipe using two forms. Small car decorated with winches, cranes Jiuquan compact, light weight. Carts run using cycloid reducer, soft start the motor, eight four-wheel drive, smooth operation. Operation with closed cab lifting mechanics, there are adjustable seats, floor mats laying insulation, windows with tempered glass, equipped with fire extinguishers, fans, heating and air conditioning can be configured according to user requirements, Xiangqi, walkie-talkies, etc. items. Fengcheng cranes, generous heavy (certified), Qingdao 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.