Because the industrialized production of precast buildings greatly reduces the pollution caused by on-site construction and improves the environmental friendliness of construction, it has become the main direction of the reform of the construction industry.

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The middle reaches of the production link mainly refers to the manufacturing of precast components in the factory, which operates on the production line through formwork assembly, pouring and other processes, mainly involving the manufacturers of various precast components.

The process of precast building industry chain is long, and the additional cost brought by design change is large, so the requirements for the accuracy of component deepening design and the matching degree with production are higher; The information system based on BIM Technology helps to improve the design accuracy, reduce the project cost and shorten the project duration.

From the perspective of regional market, in recent years, a large number of precast component factories have been built in the Yangtze River Delta, such as Jiangsu, Anhui and Zhejiang, which is also the premise for the rapid development of precast construction industry in Jiangsu, Zhejiang and Huizhou.

Precast building design is usually divided into early stage technical planning, scheme design, overall design, construction drawing design and component design (component splitting, component detail drawing and component node optimization).

According to the plan, a high-quality development system framework for the construction industry will be initially formed by 2025.

At this stage, the precast building technology system is more perfect, the component quality and construction technology level are greatly improved, and the common quality problems such as cracking and leakage are basically solved.

The upstream is architectural design and product R & D; Midstream includes manufacturers of concrete precast components, steel precast components and other components in the factory and contractors who assemble components on site; The downstream is the developer and construction operation and maintenance unit of construction projects.

Source: middle reaches of GF Securities: the production link of precast components.

Source: Zhulong precast construction industry chain.

With the development of PC component factory and assembly plant, the amortization of construction cost will gradually decrease.

Under the guidance of the government’s precast building development plan and incentive policies, as the development focus of building industrialization, precast buildings are expected to usher in explosive growth opportunities..

In the long run, with the continuous improvement of the standardization degree of the precast construction industry, the growth space of the subdivided industry leaders focusing on the fields of design, production and manufacturing is broader, and the profitability can be continuously improved through large-scale advantages and fine management.

It is urgent to accelerate the implementation of energy conservation and emission reduction in the industry.

The precast construction industry chain can be divided into three parts.

According to the prediction of China Building Energy Conservation Association, according to the current situation, the peak time of carbon emission in China’s construction industry is expected to be around 2039, nine years later than the whole country.

Precast building process: data source: CICC upstream: Architectural Design and product R & D are in the early preparation stage.

Frost & Sullivan predicts that the compound market growth rate of PC components will remain at 65% from 2020 to 2023.

Main participating enterprises of precast buildings: Source: the 14th five year plan for the development of construction industry (hereinafter referred to as the plan) issued by the Ministry of housing and urban rural development of CSC proposes that precast buildings will account for more than 30% of new buildings by 2025; The emission of construction waste at the new construction site shall be controlled below 300 tons per 10000 square meters.

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A market mechanism for the treatment and reuse of construction waste has been preliminarily formed, and a number of green construction demonstration projects have been built.

Its emission reduction is of great significance to the overall goal of double carbon.

The construction of precast buildings is the most important way to realize green environmental protection in the construction field.

The production capacity of precast components is another key factor determining the development speed of precast buildings.

Among them, the production and use of concrete precast units (PC components) are the core.

The design enterprise carries out personalized design for the project according to the requirements of the developer, issues the drawings to the manufacturer, prefabricates the building structural parts, and then transports them to the construction site to complete the subsequent construction and decoration, and finally the sales unit completes the sale.

The construction mode of precast buildings is design factory manufacturing on-site installation.

The level of construction industrialization, digitization and intellectualization has been greatly improved, the green transformation of construction mode has achieved remarkable results, and the transformation of construction industry from large to strong has been accelerated, providing strong support for the formation of a strong domestic market and the construction of a new development pattern.

Compared with the traditional design on-site construction, it is possible to find that the components manufactured in the factory can not be used until the installation stage due to the unreasonable design drawings, resulting in a waste of resources.

Com construction related industries account for 51% of carbon emissions, which is much higher than other industries.

It is necessary to carry out the design of precast buildings and the R & D of related assembled products, mainly including the R & D departments and architectural firms within each enterprise.

At present, the pattern of PC component industry is scattered, and Cr5 is 44.7%.

The fixed cost of this part will be greatly diluted, which will further reduce the total cost of precast buildings.

The fixed cost of precast components accounts for a large proportion in the cost of precast construction.

The two major characteristics of precast building construction are complex structural design and many precast components.

As the enterprises with the development of the whole industrial chain have more or less management limits, cash flow pressure and investment capital restrictions, at the same time, the demand of precast buildings for on-site workers is greatly reduced, only simple assembly on site is required, and the core value of the industrial chain is integrated into the end of the factory.