In this project, all the refined steel are required to have all welds meet Level 2 welding standards, and atom ash is prohibited in the coating process. The surface roughness of the material is required to be controlled at Ra12.5. The finish must present an antique copper effect.

FABRICATION AND CONSTRUCTION CHALLENGES

It is challenging to ensure small-section refined steel meets Level 2 penetration welding requirements while maintaining a sleek profile.  Controlling welding deformation is difficult, and the surface roughness of Ra12.5 requires milling machine processing as a must.  Achieving the antique copper effect necessitates a three-step and five-coat spray painting process, whilst geared with manual wire brushing techniques.

SOLUTIONS

To ensure small-section refined steel meets Level 2 penetration welding requirements, we use intermittent welding techniques in conjunction with slow cooling aging, minimizing welding heat concentration as much as possible to prevent deformation caused by welding. To achieve the aged antique copper finish, we utilized an extra-large baking room to shorten the complex spray painting process cycle and combined it with manual wire brushing techniques, ultimately completing the desired effect.

The largest prefabricated steel frame size is : 6625 * 7.197 * 1.39m