What is the current situation of prefabricated steel structure buildings?

The fabricated steel structure building is not a fabricated steel structure, but a fabricated building with steel structure as the load-bearing structure. As we all know, steel structures are fabricated in nature. Even local on-site welding does not change the fact that their components are manufactured in factories. Therefore, the starting point of looking at the problem should focus on the degree of factory prefabrication and on-site installation efficiency of the components that constitute the whole building, not just the steel structure, which is the basis for realizing the industrialization of buildings.

Fabricated steel structure buildings are not a new thing, especially in the recent years when the national policy level has seen frequent warm wind, and relevant policies have been implemented in various regions. But it is undeniable that the current situation seems to be very different. On the one hand, prefabricated steel structure buildings are widely used in public buildings with high acceptance. On the other hand, prefabricated steel structure buildings are rarely used in the residential area with huge market, and it is difficult to move forward. From the perspective of technology and economy, what is the problem? Here is a brief summary and analysis.

The lack of standards for prefabricated steel structure buildings seems to be quite popular, which has even led to the recent emergency organization of relevant national departments to prepare relevant specifications.

In fact, the technical standards related to steel structures (including design and construction, acceptance, etc.) are not lacking, and they have played an important role in the promotion of steel structure public buildings. For residential steel structures, there are two typical cases: first, the structural code does not support the idea and requirements of better realizing some residential building designs. Second, the proprietary structural system developed by some companies conflicts with the existing specifications, which needs special demonstration. These situations exist, but they are not the decisive factors of constraints. At the same time, these problems will be gradually solved in the recent standard preparation and revision.

However, the quality acceptance of components of fabricated steel structures will mostly involve the product supervision of factory production, and there are still some problems on how to implement it in the current specification level.