Prefabricated Integrated Assembly House

Prefabricated integrated assembly houses are a form of construction that involves industrial production of building components and on-site assembly, offering significant advantages such as shortened construction periods and reduced pollution.

I. Technical Types and Components The technical system of prefabricated integrated assembly houses encompasses prefabricated concrete structures and steel structures, with core components including prefabricated beams, slabs, walls, and columns. Based on structural form, they can be classified into three categories:

1. Panel Assembly: Utilizing prefabricated wall panels and floor slabs as core components, the building main body is formed through standardized connections. Its advantage lies in expanding indoor usable area, although design flexibility is limited by the modular characteristics of prefabricated components.
2. Box Assembly: Functional units such as bathrooms and kitchens are prefabricated into independent 'boxes' and assembled on-site through lifting to complete the building main body. This mode increases construction speed by 50%-70% compared to traditional methods but requires higher load-bearing capacity of transport vehicles and lifting height of lifting equipment.
3. Frame Assembly: Prefabricated beams and columns are used to form a skeleton, with joints cast on-site to create an integrated structure. For example, the prestressed prefabricated concrete integrated frame system applied in the Nanjing Jindi Yufang project enhances structural integrity through prestressing technology.

II. Technical Advantages and Application Cases The industrial production mode achieves millimeter-level precision in components, reducing on-site work by over 60% and shortening construction periods by 30%-50% compared to traditional buildings. Taking the fully prefabricated rural house in Ningbo as an example, using panel-type prefabricated components connected with mechanical bolts, the main structure can be installed in just 7 days. In terms of environmental protection, the industrial base in Fujian Province achieves over 70% reduction in waste through resource utilization of construction waste.

III. Development History and Market Status Prefabricated concrete technology in China began in the 1950s, initially applied in factory and residential construction. After the 21st century, enterprises like Vanke Group developed prefabricated shear wall residential structural systems, driving technological revival. According to customs data, exports of mobile houses from the Guangzhou Customs area reached 1.4 billion yuan in the first four months of 2026, a year-on-year increase of 38.1%, indicating the competitiveness of Chinese prefabricated houses in the international market.

IV. Construction Process and Integrated Mode On-site construction follows a standardized process of 'chassis frame - floor joists - wall modules - partition wall skeletons - floor beams - roof'. Modular construction, as a more integrated form, decomposes the building into three-dimensional functional modules, completing pipeline embedding and interior decoration in the factory, with only module connections required on-site, further shortening the construction cycle.