For the project of erecting the steel structures of the national stadium, the main truss was divided into two lifting elements, i. e. space 3-D truss and 2-D truss according to the actual conditions.

• 摘要国家体育场钢结构安装工程，主桁架根据安装实际情况被分成空间立体桁架和平面桁架两种吊装单元。