Precautions for Steel Structure Engineering

Release time:

2024-05-30

Fabrication of (I) steel components Steel structure fabrication includes deepening, lofting, material counting, cutting, welding, calibration, etc. The anti-slip coefficient of the friction surface of the high-strength bolt after treatment shall meet the requirements.

Precautions for Steel Structure Engineering

Fabrication of (I) steel members

Steel structure production includes deepening, lofting, material, cutting, welding, correction and other links. The anti-slip coefficient of the friction surface of the high-strength bolt after treatment shall meet the requirements.
Shot blasting derusting and spraying shall be carried out after the production is completed and the quality is qualified. The derusting grade and spraying thickness of shot blasting must also meet the requirements of the drawings. Generally, 30~50mm shall not be painted temporarily at the welding seam of installation.
(II) steel structure welding

Welders must pass the examination and obtain the certificate of qualification, and must weld within the qualified items and their approved scope. Steel stamp shall be made after welding.
The welding material shall be matched with the base metal, and appropriate welding wire and flux shall be selected. 1. secondary welds with full penetration according to the design requirements of the drawing shall be inspected for internal defects by ultrasonic flaw detection.
Transportation of (III) steel components

When transporting steel members, vehicles shall be selected according to the length and weight of the steel members, and overloading shall not be allowed. It shall be ensured that the steel members are not deformed on the vehicle and the coating is not damaged as much as possible. If the coating is damaged during transportation or loading and unloading, it shall be recoated during installation.

Site installation of (IV) steel structure

The installation of steel structure should be carried out according to the construction organization design, and safety is the top priority of steel structure installation. The installation procedure must ensure the stability of the structure and not cause permanent deformation. When installing columns, the positioning axis of each column must be directly guided from the ground control axis. After the main components such as columns, beams and roof trusses of the steel structure are installed in place, they must be corrected and fixed immediately.

Site installation of (V) steel structure

1) The fire resistance of steel structure is poor. When the temperature reaches 550 ℃, the yield strength of the steel is about the 0.7 of the yield strength at the normal temperature, and the structure reaches its strength design value and may be damaged.
The design should be based on the provisions of the relevant fire code, so that the building structure can meet the requirements of the corresponding fire standards. Within the time required by the fire protection standard, the temperature of the steel structure should not exceed the critical temperature to ensure the normal bearing capacity of the structure.
2) The exposed steel structure may be severely corroded by the atmosphere, especially the polluted atmosphere, and the most common is rust. It is necessary to carry out anti-corrosion treatment on the surface of the component to ensure the normal use of the steel structure. The method of anti-corrosion treatment is determined according to the requirements of the surface condition and service life of the component.