Overhead (gantry) crane girder deformation cutting method

In some cases can affect the weight of the arch girder Alice degrees. On the cover of the main beam cutting processing, the flexural modulus of the cut portion of the main beam is reduced, the main beam flexural capacity weakened, mechanical deformation in the main beam own weight, single girder overhead cranes the arch span value minus small, cantilevered end upturned value increases. With this scheme is relatively easy to control the entire amendment process and distortion of the size, but note that the primary and secondary webs cut around the site since the main beam direction perpendicular to the axis of rotation deformation web direction, may cause waves over the web poor, must be prevented.
Practice has proved that the cutting method is simple to operate, easy to control, in the main beam of permanent deformation after general can better maintain its original technical data, technical parameters will not cause more reason because of aging, including stress or thermal deformation after release big change. Therefore, the main beam cutting method in ultra-poor arch Camber large new office is a good main beam correction methods. This method can also be used to correct the excessive boom (cross within acceptable), gantry cranes cross inside is too high (cantilever qualified) or some other aspect of the upturned arch defects, choose a different support positions vacant as long as the main support beam, select a different the cut portion can achieve the intended purpose. It must be noted that the large amount of correction must pay attention to take technical measures to prevent the web deformation.