Remarkable as the main venue for the 2008 Beijing Olympic Games at the National Stadium, as Beijing's largest, multi-use stadium with international advanced level, is one of the most characteristic representatives. Steel structure for the national stadium project is a large-scale, strange shapes, structures and node structure is extremely complex. This structure is unique, and is the first in the world. To build "the best, world-class" stadiums, fully implement the "Green Olympics, high-tech Olympics and people's Olympics" concept to ensure successful completion of steel structures the safety, quality, function, duration, and cost of construction, must be based on the characteristics and difficulties of the project, the National Stadium (bird's nest) extra large space special-shaped steel structure construction technology research and development.
This research belong to the field of construction technology, results as follows: complete support system design and fabrication and installation technologies. According to characteristics of steel structures, lifting segment and lower concrete grandstand structure layout, cross node of main truss bottom chord position 80 3x3m lattice support towers.