Prefabricated House Construction Process

The construction process of a prefabricated house typically includes six core steps: foundation treatment, installation of foundation piles and beam assembly, production and transportation of modular components, on-site assembly, interior decoration and detailing, and inspection and delivery. Details are as follows:

1. Foundation Treatment
The foundation is the basis of a house's stability and requires land leveling and concrete pad pouring to ensure load-bearing capacity. For example, in a rural case in South Korea, excavators were used to clear weeds and level the foundation, and surveying stakes were used to control excavation depth and ground height, ultimately resulting in a concrete pad. This step must strictly adhere to design requirements to avoid structural cracking due to foundation settlement.

2. Installation of Foundation Piles and Beam Assembly
After the concrete has set, install the foundation plates and secure the foundation piles (in some cases, foundation piles can weigh up to 5 tons and require crane assistance). Then, assemble the beams, adjust their positions through level measurements, secure them with nuts, and fill with expanding foam to enhance stability. This step must ensure the verticality of the foundation piles and beams to avoid deviations during subsequent module assembly.

3. Production and Transportation of Modular Components
Factories use automated production lines to prefabricate building modules, including ceilings, floors, walls, and plumbing and electrical systems. For example, in China's modular construction, scattered components are assembled into independent modules, each with an 'ID card' (containing project name, model, production date, etc.) for traceability and management. Modules must undergo quality inspections before being transported to the site, where they must be secured to prevent deformation during transit.

4. On-Site Assembly
Use tower cranes and other equipment to precisely hoist prefabricated modules to designated positions and ensure overall integrity through cast-in-place connections (such as concrete pouring). For example, a residential project in Shanghai used 6,028 concrete modules to assemble a nearly 100-meter-high residential building, with cast-in-place connections between modules forming a continuous structure to enhance seismic performance. Assembly must be carried out in the order specified in the design drawings to avoid misalignment.

5. Interior Decoration and Detailing
After completing the main structure, perform fine segmentation of interior partitions, floor joists, etc., and install doors, windows, roof trusses, etc. For example, in wooden prefabricated houses, floor joists are laid, wall modules are erected, and nodes are ultimately secured with metal connectors. This step requires attention to plumbing and electrical pre-burials and interface sealing to avoid rework later.

6. Inspection and Delivery
Check whether all component gaps are grouted and sealed, and whether the nut-fixed areas are cement-sealed (to prevent corrosion), ultimately completing the delivery of the house in either rough or finished condition. For example, the prefabricated rural housing project in Mengcheng County took less than two months from the start of construction to the delivery of the rough house, reducing the construction period by more than 60% compared to traditional buildings and minimizing on-site noise and dust pollution. Inspections must comply with national building standards to ensure safety and functionality.