Being a form of new type of multi, Functional building material, It is crafted from steel plate at both side and polystyrene sandwiched. They are bonded with high intension adhesive at intense temperature and pressure through auto forming machine. Light in deadweight 10, 14kg/sqm, Quick and straightforward to mount don t 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 the lenth, Assembly line of them can be chosen at your willing. Heat and sound insulation average thermal conductivity not less than 0. 04w/m. K.