How to choose one, choose gantry crane it complies with the relevant provisions of General Purpose Gantry GB / T14406-1993 and GB5905-86 of. Under normal circumstances, since the weight of 50t gantry crane hoists the following span gantry crane installation in less than 35m, no special requirements, should use a single main beam. If you require a large gate leg width, high operating speed, or frequent lifting heavy items, grew up in pieces, then should choose the double girder gantry crane. Second, the length of the span and cantilever gantry crane span is an important factor affecting the quality of the crane itself. Selection, to meet the conditions of use and equipment Subject to span series of standards, should be minimized span. Working-level gantry crane gantry crane is working level A: It reflects the operating characteristics of the crane load status and use in busy two aspects. Q working-level classification is determined by the level of U and use the crane load state. They are divided into eight levels A1 ~ A8. Gantry quay cranes working level, which is the working-level metal structure is determined by the lifting mechanism is divided into A1-A8 level, if the provisions of the type of work the crane controls, roughly the equivalent of: A1-A4- light; A5- A6- in; A7- weight, A8- special weight. 100 tons gantry crane gantry crane _ _ Puning heavy generous generous by heavy machinery Co., Ltd., Henan Province. Heavy Machinery Co., Ltd., Henan Province, generous (www.hnqizhongshebei.com) (www.hnqizhongshebei.com) strong, credible, in Zhengzhou, Henan engineering, construction crane industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving generous innovative ideas will lead into the brilliant heavy and you work for a better future!