Steel for prefabricated steel structure construction needs to be "tailored"

Prefabricated steel structure buildings not only consume a large amount of steel, but also have higher requirements for the material, variety, and performance of steel compared to reinforced concrete buildings, and require a wider variety of steel types.

According to industry insiders, there are many types of prefabricated steel structures, including heavy-duty steel structures, large-span steel structures, lightweight steel structures, high-rise steel structures, residential steel structures, spatial steel structures, and bridge steel structures. The steel used is also different, and the consumption, quality, and performance requirements for steel are also different. For example, large sports stadiums, airport terminals, large German H-shaped steel yards, exhibition halls, waiting halls, etc. are generally large-span and large-space buildings that require strong wind, snow, and seismic resistance, and generally use grid steel structures. Building prefabricated steel structures in coastal areas also requires steel to have good corrosion resistance.

    一般的多

The high-rise residential building adopts a lightweight steel structure, which belongs to the prefabricated steel structure housing system. The steel that consumes a large amount is cold-formed thin-walled steel. This is an economical lightweight thin-walled steel, also known as steel cold formed profiles. The types of models include C-shaped steel, U-shaped steel, Z-shaped steel, strip steel, galvanized strip steel, galvanized coil steel, galvanized C-shaped steel, galvanized U-shaped steel, galvanized Z-shaped steel, etc. As the construction speed of rental housing, elderly care apartments and other projects accelerates, the demand for cold-formed thin-walled steel will also significantly increase.

In addition, the load-bearing components of lightweight steel structure buildings, including steel columns, steel beams, steel structure foundations, steel roof trusses (the span of the factory is relatively large, and now mostly steel roof trusses), and steel roofs, all use high-strength, lightweight, and high-performance plates, profiles, and steel pipes. At the same time, the components are connected by bolts, and there is also a large demand for cold heading steel.