Prefabricated Building Construction

Prefabricated building construction is an industrialized construction model that breaks down a building into independent modules or components, which are prefabricated in factories and then transported to the site for assembly. It features standardization, efficiency, and environmental protection as its core characteristics.

I. Core Processes and Implementation Methods

1. Factory Prefabrication Stage
   Component types cover basic structures such as beams, slabs, walls, columns, stairs, and balconies. Standardized design and production are adopted, with errors controlled at the millimeter level. Modular buildings further integrate ceilings, floors, water and electricity pipelines, etc., to form complete functional units (such as bathroom modules with waterproof layers), which are assembled through automated production lines. All components or modules need to be labeled with project names, model numbers, production dates, and other information to ensure traceability.

2. On-site Assembly Stage
   After being transported to the site, the prefabricated components are assembled into a complete building through reliable methods such as welding and cast-in-place connections. Modular buildings adopt a parallel operation model, for example, the construction of the main structure and interior decoration are carried out simultaneously. The construction period is shortened by more than 60% compared to traditional methods, and the on-site labor force is reduced by about 50%. A typical case is the affordable housing project in Shenzhen, Guangdong. A total of 6,028 concrete modules were assembled to form a residential building nearly 100 meters high, and the completion and delivery period was compressed from 2.5 - 3 years to 1 year.

II. Technical Advantages and Implementation Requirements

1. Advantages

   • Short Construction Period: Industrial production and on-site assembly are carried out in parallel, significantly shortening the construction cycle.
   • Controllable Quality: The factory environment reduces human errors, resulting in high-precision components and strong quality stability.
   • Energy Conservation and Environmental Protection: It reduces on-site noise, dust, and construction waste, meeting green building standards.
   • Convenient Maintenance: Modular design facilitates later inspection, repair, and replacement, extending the service life of the building.

2. Requirements

   • System Support: A complete technical system (such as connection node design), production system (such as automated production lines), and industrial cluster (such as supply chain collaboration) are required.
   • Equipment Dependence: High requirements are placed on transportation and lifting equipment. For example, ultra-large modules require special transportation vehicles and cranes for cooperation.

III. Application Scenarios and Policy Support

This model is widely used in residential, commercial, and industrial buildings. At the policy level, many places have clearly promoted prefabricated buildings. For example, starting from 2026, all residential land for sale in Guangzhou will implement prefabricated building standards at 100%. In the market, the market size of modular buildings is expected to exceed 142.8 billion US dollars by 2030, reflecting the industry's recognition of and increasing demand for industrialized construction models.