1. Rust removal: The use of sandblasting, shot blasting, pickling, and other methods to remove the rust, oil, oxide, and other aspects of the surface of the steel structure, improve the roughness and cleanliness of the steel surface, and prepare for the subsequent coating or hot dip plating and other anti-corrosion treatment.
2. Anti-corrosion treatment: according to the use of the steel structure environment and design requirements, the steel structure after rust removal for anti-corrosion treatment, such as painting, hot dip galvanized, spraying anti-corrosion coating, etc., in order to extend the service life of the steel structure.

1. Welding: according to the steel structure material, thickness, welding position and other factors, choose the appropriate welding methods and welding materials, such as manual arc welding, gas shielded welding, submerged arc welding, etc., the various parts are connected as a whole. During the welding process, the welding process parameters should be strictly controlled to ensure the welding quality and prevent welding defects.
2. Bolt connection: for some steel structural parts with bolt connection, the processing of bolt holes and the installation of bolts should be carried out according to the design requirements. The machining accuracy of the bolt hole should meet the standard requirements, and the tightening torque of the bolt should reach the specified value to ensure the reliability of the connection.

1. Bending molding: The use of bending equipment, such as plate rolling machine, pipe bending machine, etc., to bend the steel into the required arc and shape. During the bending process, attention should be paid to controlling the bending radius and bending Angle to avoid defects such as cracks in the steel.
2. Stamping molding: for some complex shape of steel structural parts, can be formed by stamping process. Through the action of punches and molds, the steel is stamped into the desired shape and size.
3. Correction: in the cutting, bending, stamping and other processing deformation of the steel to correct, so that it meets the design requirements of the size and shape. Correction methods include mechanical correction, flame correction and so on.