Advantages of Different Prefabricated Steel Construction Technology

Steel-Concrete Composite Structure
The beam and column load-bearing structure composed of shaped steel or steel management and concrete components is a steel-concrete composite structure, and its application scope has been increasingly expanded in recent years. The composite structure has the advantages of both steel and concrete. It has high overall strength, good rigidity, and good seismic resistance. When it is constructed with outer concrete, it has better fire resistance and corrosion resistance. Combined structural members can generally reduce the amount of steel used by 15 to 20%. Combined floor slabs and steel tube concrete components also have the advantages of less or no formwork, convenient and fast construction, and have great potential for promotion. It is suitable for frame beams, columns and floor coverings of multi-story or high-rise buildings with larger loads, and industrial building columns and floor coverings.

High-Strength Bolt Connection And Welding
High-strength bolts, which consist of three components—bolts, nuts, and washers—transmit stress via friction. High-strength bolted connections have the advantages of simple construction, flexible disassembly, high bearing capacity, good fatigue resistance and self-locking properties, and high safety. In the field of engineering, they have supplanted partial welding and riveting as the primary method of connection for the manufacture and installation of steel structures. For steel components made in the workshop, thick plates should use automatic multi-wire arc submerged welding, and box column partitions should use fusion nozzle electroslag welding and other technologies. During on-site installation and construction, semi-automatic welding technology, gas shielded welding flux-cored wire and self-shielded flux-cored wire technology should be used.

Steel Structure Protection
Anti-rust, anti-corrosion, and fire protection are all included in steel structural protection. Generally, there is no need for anti-rust treatment after fire-retardant coating treatment. However, anti-corrosion treatment is still required in buildings with corrosive gases. There are many types of fire retardant coatings in China, such as TN series, MC-10, etc. Among them, MC-10 fire retardant coatings include alkyd enamel paint, chlorinated rubber paint, fluorine rubber paint, and chlorosulfonated paint. During construction, appropriate coatings and coating thicknesses should be selected based on the steel structure type, fire resistance grade requirements and environmental requirements.