Steel Structural Frame:

Manufacture Process:

The steel manufacture standard is GB50221-2001, which is higher quality than international standard.
The superficial rust of steelwork should be removed before painting and needs to meet Sweden SA 2.5 standard. After rusting, the average surface roughness of the components should reach 37-70 um and should be spray painted within 4 hours. If the components come to rust, the rust should be cleared up again. Otherwise  no paint. Single level butt welding and fillet welding to be done by electric arc welding and gas shielded welding in the factory. The surface of steel work can be Zinc primer, red primer or galvanize.

                         Steel product:

            

                                               Column and Rafter: