By the end of 2021, the proportion of precast buildings in the newly-built building area should reach more than 10% and increase year by year.

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By the end of 2021, the proportion of precast buildings in the newly-built building area should reach more than 15% and increase year by year.

According to statistics, the carbon emission in the whole process of precast buildings is 472.23kg/m lower than that of traditional cast-in-situ buildings ²， Carbon emissions are reduced by 30% – 40%, of which the construction stage is reduced by about 20%, and the effect of energy conservation and emission reduction is remarkable.

Moderately promote regional development..

5) Energy conservation and environmental protection according to the Research Report on China’s building energy consumption (2020) released by the energy consumption statistics Professional Committee of China Building Energy Conservation Association, the total carbon emission in the whole process of construction in 2018 was 4.93 billion tons of CO2, accounting for 51.3% of the national carbon emission, including 2.72 billion tons of CO2 in the production stage of building materials, accounting for 28.3% of the national carbon emission, and more than 90% came from steel, cement and aluminum.

Next, we will analyze in detail the reasons for the good development prospect of precast buildings from these two aspects.

It is a new building production mode to realize the energy conservation, environmental protection, full cycle value maximization and sustainable development of construction products, Its construction characteristics can greatly avoid the emergence of construction waste, and has obvious advantages of energy conservation and emission reduction.

Architectural features of precast buildings: 1) a large number of building components are produced and processed by the workshop.

Precast buildings – energy conservation and emission reduction comply with the carbon neutralization policy.

4) Meet the requirements of green building.

In addition, the precast building can also be reused due to its removable characteristics.

By the end of the 14th five year plan, the proportion of precast buildings in the newly-built building area in the region should strive to reach 30%.

Scope of implementation: precast buildings shall be adopted for construction projects invested by the government or state-owned funds, and the proportion of precast buildings in other projects shall not be less than 30%, and the proportion requirements shall be gradually increased.

Precast buildings transfer a large number of on-site operations in the traditional construction methods to factories, and adopt standardized design, factory production, assembly construction, information management and intelligent application.

2) A large number of assembly operations on site are greatly reduced compared with the original cast-in-situ operation.

The goal is to achieve that the proportion of precast buildings in the new construction area will reach 55% by 2025.

Compared with the material waste, dust, noise, construction waste and other pollution caused by traditional buildings in the construction process, the precast building site is mainly dry operation, which can effectively reduce energy consumption and environmental pollution.

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3) The integrated design and construction of architecture and decoration are adopted.

Scope of implementation: 1 The newly approved government invested new buildings with an aboveground building area of more than 3000 square meters shall adopt cast buildings, of which the new public buildings with a single aboveground building area of more than 10000 square meters shall adopt steel structure buildings.

Scope: government investment projects such as newly-built affordable housing and public rental housing should give full play to the role of demonstration and guidance and take the lead in implementing the policy requirements of assembled construction.

The goal: by 2025, the proportion of newly started precast buildings in the province will reach more than 40% of new buildings in cities and towns.

Relevant requirements shall be set by means of bidding, auction and hanging documents.

2) On May 8, 2022, six departments including the Department of housing and urban rural development of Shandong Province issued the opinions on promoting the development of the whole industrial chain of new building industrialization.

Target: by 2025, the newly started precast buildings in the city will account for more than 40% of the new buildings.

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The types of components mainly include: exterior wall panels, interior wall panels, laminated plates, balconies, air conditioning panels, stairs, precast beams, precast columns, etc.

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This is due to the architectural characteristics of precast buildings and the strong support of national policies.

By the end of the 14th five year plan, the proportion of precast buildings in the newly-built building area should strive to reach 40%.

Scope: promote the construction of precast houses with steel structure, and encourage hospitals, schools and other public buildings to give priority to the use of steel structure.

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3) On February 28, 2022, Xi’an municipal government issued the notice on printing and distributing the implementation plan of Xi’an for promoting the coordinated development of intelligent construction and new building industrialization.

In recent years, the development of super assembly construction industry is far from that of other construction types.

Objective: strive to make the proportion of precast buildings in the province accounting for 30% of the newly-built urban construction area at the end of the 14th five year plan (2025).

Precast buildings shall be adopted for commercial housing development projects, new public construction projects with a floor area of more than 20000 square meters, and new plants and warehouses on industrial land.

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Actively promote regional cooperation.

Policy support – proportion of precast buildings in new buildings 1) on April 25, 2022, the general office of the Beijing Municipal People’s government issued the implementation opinions of the general office of the Beijing Municipal People’s Government on the further development of precast buildings.

Hospitals, schools and other public buildings are encouraged to give priority to the use of cast steel structure system, and the pilot of steel structure housing is accelerated.

The newly-built indemnificatory housing projects with an aboveground construction area of more than 20000 square meters (including public rental housing, common property right housing and resettlement housing, the same below) shall adopt precast buildings.

Scope: determine Harbin as the key promotion area, Qiqihar, Mudanjiang, Daqing and Jiamusi as the active promotion area, and other cities (regions) as the moderate promotion area.

5) On June 21, 2021, 14 departments including the Department of housing and urban rural development of Heilongjiang Province issued several opinions on accelerating the industrialization of new buildings.

Key promotion areas.

4) On January 12, 2022, Sichuan Provincial Department of housing and urban rural development and other six departments issued the work plan for accelerating the transformation of the development mode of the construction industry and promoting the construction of a strong construction province.

The ideal state is that the decoration can be carried out simultaneously with the main construction.

Target: by 2025, new precast buildings will account for more than 40% of new buildings.

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