In the process of modern production and construction, gantry crane has become a necessary equipment. It can not only effectively reduce the labor force, but also improve the efficiency of production, accelerate the pace of social construction.  Semi - gantry crane, as the main representative of electric single beam crane, has many characteristics in recent years, such as polarization development.  Let's take a closer look at it.

The so-called polarization refers to the phenomenon that cranes expand and develop in its two aspects of large-scale and miniaturization at the same time.  In recent years, the overall development of China's construction machinery is relatively rapid. The development of China's crane industry in large-scale is particularly prominent.  At 2012 BMW Shanghai exhibition , Zoomlion displayed the world's largest tonnage all terrain crane, which also set three world records: the first in lifting capacity, the first in boom length and the first in load capacity.  And  China's other two construction machinery giants Xu gong and Sany also launched crawler crane with a lifting capacity of more than 3000 tons.

 Our construction machinery is very attractive in terms of large cranes.  Miniaturization trend is more reflected in the foreign crane brand.  Some companies have also introduced " mini" electric hoist bridge cranes, which combine road capacity with special telescopic boom technology to make them easier to use.