为了满足轧钢等一类大型冶金工业厂房生产工艺流程的需求,厂房结构及屋盖需要采用大面积大跨大柱距设计。如宝钢2030全连续冷连轧带钢厂,每年需轧制各种汽车板、镀锌板、塑料涂层板达250多万吨,要达到这样高的产量,就需要采用电子控制下进行高速、自动、连续化生产的工艺和设备,要求各条机组生产线随生产流程序列紧密衔接,并要求土建需要有大面积(多跨) In order to meet the needs of a large-scale metallurgical industrial plant production process, such as rolling mills, large-area large-span and large-pillar-pitch designs are required for the structure and roof of the plant. For example, Baosteel 2030 full continuous tandem cold strip mill requires rolling more than 2.5 million tons of auto plates, galvanized plates, and plastic coated plates each year. To achieve such a high output, high-speed electronic control is required. The automatic and continuous production processes and equipment require that each unit production line be closely connected with the production process sequence, and requires that the civil engineering needs a large area (multi-span).