... , welding beam, column, C and Z -shape purlin. Steel Structure Works:A. The main structure( welding H section steel)1. Steel ... material: Q345, Q235.2. Welding type: Auto- Submerged arc Welding and CO2 shielded welding.3. Derusting Grade ... : FOB, CIF C&FPayment: T/T, L/C steel structure works