Compared with traditional building methods, precast buildings have multiple advantages: first, because the main structure is precast, multiple links can be started at the same time, greatly improving efficiency; Secondly, the precast structure can reduce the construction waste to a large extent (accounting for 30% – 40% of the total urban waste), such as waste steel, waste iron wire, waste bamboo wood, waste concrete, etc; Finally, compared with the traditional cast-in-place construction method, precast PC structure is of great significance to the low-carbon construction industry.

Recently, the Shanghai Municipal Commission of Housing and Urban-Rural Development issued the “Fourteenth Five-Year Plan” for precast buildings in Shanghai, which mentioned that during the “Fourteenth Five-Year Plan” period, Shanghai continued to focus on precast buildings, deepen the innovation, transformation and development of the construction industry, strengthen the application of information and intelligent technology, realize the upgrading and development of precast buildings from “good to good”, and improve the project quality, safety, efficiency and quality.

In the main pilot areas, tax incentives, floor area ratio incentives, financial subsidies and other supporting policies have been given, which has promoted the annual composite growth rate of precast new construction during the “13th Five-Year Plan” period to 54%.

According to the statistics of Xincai.com, at present, many provinces and cities across the country, such as Fujian, Anhui, Hebei and Tianjin, have taken precast buildings as the key development plan of the “Fourteenth Five-Year Plan”.

It is based on such advantages that the Shanghai Municipal Commission of Housing and Urban-Rural Development and other cities have taken the development of precast buildings as the key planning of the “Fourteenth Five-Year Plan”.

However, precast buildings have been plagued by costs, and the high cost of PC components is an important reason.

In order to solve this problem, the policy side has given strong support in recent years.

In addition, this is expected to become a fundamental turning point in the precast construction industry.

Relevant precast buildings mainly include precast precast concrete structures (PC structures), steel structures, modern wooden structures, etc., because the use of standardized design, factory production, assembly construction, information management, and intelligent application is the representative of modern industrial production mode.

As the “double carbon” goal penetrates into all fields, under the pressure of carbon emission reduction, the property of precast buildings with carbon emission reduction of more than 20% is expected to become a major highlight, accelerating the arrival of the turning point of the industry, promoting rapid innovation in the industry, and accelerating the decline of costs-.

The data shows that the unit component cost of some PC component production leaders will decrease by about 20% between 2018 and 2020.

The data shows that precast buildings can reduce carbon emissions by more than 20%, which is an important technical path for the construction industry to achieve “carbon peak” and “carbon neutral”.

After 2024, the precast buildings will basically gain cost advantages compared with the traditional cast-in-place construction.

Under the large-scale demand, the cost will decrease accordingly.

Halfen Channel

According to the estimation of the Ministry of Housing and Urban-Rural Development, it is estimated that the PC precast buildings with an assembly rate of 50% will be at the same level as the cast-in-place cost in 2024.