Why is the light steel villa developing slowly in my country and talk about the development trend of steel structure assembly houses

The steel structure assembly building, which is a new building form of prefabricated new construction model steel structure building structure.

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The so -called prefabricated building is based on prefabricated components as the core. Okay, transport to the construction site and use machinery for a new type of construction model. Simply put, prefabricated buildings are new construction models that are pre -assembled in the factory in advance in the factory, and then assembled at the scene.

corresponding to prefabricated buildings is a traditional paddling construction building model. In comparison, prefabricated building models are more conducive to green construction. It has great advantages with environmental protection. At the same time, prefabricated buildings have the characteristics of standardized design, factory production, assembly construction, integrated decoration and information management models, which can not only effectively shorten the construction cycle and reduce the cost of building, but also the industrial development of my country's construction industry.

The steel structure building

The steel structure building, which forms the three major domestic architectural forms in China with the wood structure and concrete structure. Similarly, steel structure assembly buildings, wooden structure assembly buildings and concrete structure assembly buildings are also the three major prefabricated buildings in my country. Compared with the latter two, the steel structure assembly building has the advantages of high safety, low cost, short construction period, and energy conservation and environmental protection. It is currently the state that is vigorously promoted by the state.

1. The development process of steel structure assembly housing

The start to develop the development of steel structure assembly buildings in China, starting from the State Council at the end of the last century, " The notice on promoting the modernization of the housing industry and improving the quality of housing ", put forward the development and research of strengthening new structural technology, actively developing and promoting the use of light steel frame structures and its supporting assembly plates.

But its truly rapid development is mainly the policy promotion of the country after the 18th National Congress of the Communist Party of China. Especially after 2016, the policies of steel structure assembly buildings have continued to accelerate. With the support of many important central policy documents, various localities have successively carried out pilots of steel structure assembly buildings to truly promote the development of domestic steel structure assembly buildings.

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On February 6, 2016, the State Council issued the "Several Opinions on Further Strengthening the Management of Urban Planning and Construction", pointing out that it is necessary to vigorously promote assembly buildings and actively promote steel Structural architecture.
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On June 1, 2017, the "GB/T51232-2016) released by the state was officially implemented.
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On March 7, 2018, the Ministry of Housing and Urban -Rural Development released the "Energy Conservation and Science and Technology Department of the Ministry of Housing and Urban -Rural Development Construction in 2018" pointed out that the rigid structure prefabricated houses improve the performance, quality, economy, and comfort , Durable and other issues have the advantages of fast construction progress and obvious energy -saving effects, further promoting the application development of steel structure assembly buildings in the field of housing and housing.
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has begun in July 2019. The Ministry of Housing and Urban -Rural Development has successively agreed to the pilot of the construction of "steel structure assembly housing" in Hunan Province, Shandong, Sichuan, Zhejiang, Henan, and Jiangxi Domestic development.

2, the current status and problems of the steel structure assembly housing

As mentioned above, the development of my country's assembly buildings began in the end of the last century , But the real rapid development should be after 2016. Therefore, the actual market development time is still short, and the lack of mature market cognition and application promotion.

Taking the national construction industry data in 2018 as an example, the new construction area of ​​national prefabricated buildings is only 290 million square meters. The proportion of steel structure assembly buildings is only about 30%, and it is mainly concentrated in the public building field. Steel structure assembly residential buildings can be ignored, and the data is less than 1%.

The reason for this status quo is mainly from two major aspects, namely market application promotion and steel structure assembly residential technical services.

The market application promotion

The as a new form of housing and residential building, steel structure assembly residential buildings currently have a large market acceptance problem Essence

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For developers, the construction cost of steel structure assembly houses is relatively high. Even if the steel structure assembly housing model has the advantages of reducing the construction cycle and reducing the cost of building, the premise is to have a relatively complete steel structure assembly building production management system, from the factory of prefabricated components and accessories to the construction assembly at the scene. From the professional technology of the construction personnel to the management, the relevant costs have been effectively reduced under mature systematic construction.

But at present, regardless of the production cost of factory accessories, or the cost of professional and technical personnel and management personnel, it is significantly higher than that of traditional pouring construction.
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For design units and construction units, steel structure assembly residential buildings, as a new building model, are relatively unfamiliar market areas. Design units or construction units are lacking in the relevant technologies and management forces they need, and they are unwilling to contracted such businesses.

This problem of market acceptance, which leads to the steel structure assembly houses, which are relatively slow in terms of industrial development and market applications. Various advantages of steel structure assembly houses.

The technical service

steel structure assembly buildings have corresponding problems in their technical services.

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is first in terms of technical accumulation. In terms of design and construction management, it lacks corresponding professional talents, technology, and management forces No;
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Secondly, in terms of supporting services, housing and residential buildings are different from general public buildings. Solving the service plan, but the current steel structure market is only responsible for the structure, while the subsequent maintenance, decoration, and completion of building products are responsible for others. Problem of engineering quality responsibility.

has no doubt that the vigorous promotion of national policy forces will become an effective way to solve the problem of the development of steel structure prefabricated housing. Following the pilot work of steel structure assembly housing in Hunan and Shandong in 2019, the Minister of Housing and Urban -Rural Development of Housing and Urban -Rural Development in the "People's Daily" issued a statement again to vigorously promote the development of steel structured housing, and further for the steel structure assembly houses. Market application opportunities. It is foreseeable that the market application scope of domestic steel structure assembly housing in 2020 will accelerate expansion, and the technology and market business development of corresponding production enterprises will also usher in a new opportunity.

3, the quality risk guarantee of steel structure assembly housing

Compared with traditional field pouring construction, steel structure assembly residential buildings lack mature mature Market applications help it form a relatively complete design, construction, production system and mature technical management operation experience. This will make its future market application development and have to face corresponding quality risks.

Housing and houses are different from other general buildings. The users are large numbers of national consumers. The quality of houses and houses directly related to the safety of the lives and property of the general public. Therefore, the market has higher requirements for the quality and comfort of steel structure prefabricated houses.

. At present, the important technologies of steel structure assembly houses are still immature The question, this requires it to establish a sound residential quality risk guarantee system. Specifically, through engineering quality guarantee and the corresponding engineering quality insurance, it provides effective quality and safety guarantee for steel structured housing.

The quality guarantee of the defect liability period

The project quality guarantee, mainly for the quality maintenance risk of the construction party after the project was completed. Once the project engineering occurs in quality problems during the defect liability period, if the construction parties do not perform the maintenance obligations, the guarantor will be guaranteed to replace the maintenance obligations or make compensation for losses.

Quality guarantee after the defect liability period

idi project quality potential defect insurance, mainly for the residential quality risk after the project defect liability period Essence Its insurance target includes the foundation of basic engineering, main structure engineering engineering, thermal insulation and waterproof engineering due to design, materials, and construction due to design, materials, and construction. Leak and wall falling off are all within the scope of insurance liability.

This quality guarantee and IDI engineering quality potential defect insurance can provide effective quality risk guarantees for steel structure prefabricated houses, especially the quality of IDI engineering quality potential The TIS quality risk management service provided by defect insurance can enable professional technical personnel to participate in the quality risk management of the whole life cycle of steel structure assembly housing projects, and make up for the current immature of some important technologies in some important technologies. question.

steel structure assembly housing is one of the key directions for the future development of my country's construction industry. Therefore, regardless of its market application development issues or housing quality problems, it should become the country and the industry Consider key issues. Through the further vigorous advancement of national policy, the former will effectively accelerate and expand its market application; the latter can provide effective guarantee for residential quality risks through engineering guarantee and engineering insurance.