Being a kind of new type of multi-functional building material, it consists of steel plate at both side and polystyrene sandwiched. They are bonded with high intension adhesive at high temperature and pressure through auto forming machine. 

 easy to install (dont need crane), short construction period and low cost. 

Large load: Used as supporting structure and defense device for its characteristic of high intension rigidity. 

Flexible to use: Controlled by computer in its continuous assembly line, the lenth of them can be chosen at your willing.