Prefabricated Assembly House Manufacturing

Prefabricated assembly house manufacturing is an industrialized building model that involves prefabricating components in factories and assembling them on-site, featuring standardization, efficiency, and environmental friendliness as its core characteristics.

I. Core Manufacturing Process

1. Factory Prefabrication Stage

   • Standardized Disassembly and Modular Production: Buildings are broken down into prefabricated components such as beams, slabs, walls, and columns (e.g., prefabricated wall panels and floor slabs), or further refined into independent modules like ceilings, floors, and plumbing and electrical systems. For example, the CSCEC Hailong Intelligent Construction Industrial Park can deliver 20,000 to 30,000 modules annually through automated production lines, reducing construction time by over 60% compared to traditional buildings.
   • High-Precision Control and Information Management: Component production accuracy is measured in millimeters, with each module carrying an 'ID card' that identifies project information, model, and production date, enabling full lifecycle traceability.

2. On-Site Assembly Stage

   • Rapid Assembly Techniques: Prefabricated components are assembled using mechanical bolts, cast-in-place connections, and other methods. For instance, the fully prefabricated residential buildings in Jiangbei, Ningbo, Zhejiang, use a plate-structure mechanical bolt connection, allowing the main structure to be assembled in just 7 days.
   • Modular Lifting Construction: Highly integrated modular buildings are lifted using tower cranes and other equipment, increasing construction speed by 50%-70%, though they rely on transportation and lifting equipment.

II. Technical System and Advantages

1. Technical Types: These include prefabricated concrete structures, steel structures, and modern timber structures, supporting various forms such as panel-based, box-based, and frame-based assembly.
2. Core Advantages:
   • Reduced Construction Time: The construction period for affordable housing projects in Shenzhen has been shortened from 2.5-3 years to 1 year, while on-site labor for a property development in Shanghai has been reduced by about 50%.
   • Environmental Benefits: Industrial bases in Fujian Province have achieved over 70% reduction in construction waste, with significant decreases in on-site noise and dust.
   • Policy Support: Starting in 2026, 100% of residential land sold in Guangzhou will require prefabricated construction, while Hainan Province aims for 80% of newly started prefabricated buildings by 2025.

III. Application Scenario Expansion

1. Domestic Applications: From early factories and residential buildings to affordable housing and commercial developments. For example, a property development in Shanghai achieved efficient construction through the installation of prefabricated 'building blocks'.
2. International Market: China's exports of prefabricated houses have grown significantly, with Guangzhou Customs reporting RMB 1.4 billion in exports of portable houses in the first four months of 2026, a year-on-year increase of 38.1%, indicating rising global demand for industrialized construction.