Rural Prefabricated House Assembly Process

The assembly process of rural prefabricated houses typically includes five core steps: foundation treatment, installation of foundation piles and beams, construction of the main frame, installation of the roof and internal structures, and detailing work. The specific process is as follows:

1. Foundation Treatment
The foundation is the cornerstone of a house's stability and requires targeted treatment based on geological conditions. First, the site is leveled and cleared of debris, followed by excavation of foundation pits to the designed depth. Taking a rural case in South Korea as an example, a white plastic sheet is laid at the bottom of the pit to prevent water infiltration, and then a concrete cushion is poured, typically 10-15 centimeters thick, to enhance foundation strength and prevent future settlement. If the soil is soft, additional crushed stone cushions or wooden piles may be added for reinforcement.

2. Installation of Foundation Piles and Beams
After the concrete cushion has set, anchor plates are installed as fixed reference points. Heavy prefabricated foundation piles (each weighing up to 5 tons) are lifted into place using a crane and bolted to the anchor plates through pre-drilled holes, ensuring a verticality error of less than 2 millimeters. Subsequently, beams are assembled and fixed with high-strength bolts, with gaps filled with expanding foam to prevent rainwater infiltration and the surface smoothed with cement to form an integrated load-bearing structure. In some cases, metal angle brackets are added at the connections between beams and foundation piles to further enhance shear resistance.

3. Construction of the Main Frame
On the foundation platform, prefabricated components are installed in sequence:

• Floor Joists: Wooden or steel joists are fixed with metal connectors, with spacing adjusted according to load requirements (typically 30-60 centimeters) to form a floor support network.
• Wall Modules: Prefabricated wall panels (including door and window openings) are hoisted into position, aligned, and fixed to the joists with nails or bolts, with 2-3 centimeter gaps left between modules for grouting.
• Floor Beams: For multi-story structures, prefabricated beams are installed at the top of the walls and connected to the walls via mortise-and-tenon joints or bolts to form a horizontal load-bearing layer.

4. Installation of the Roof and Internal Structures
Roof trusses are hoisted onto the top beams of the walls using a crane and fixed with bolts or welding to form a triangular stable structure. After roofing, the internal partition wall frames are cut and assembled, typically using light steel joists or wooden frames with spacing of 40-60 centimeters. The floor beams of the second floor are laid in alignment with the first-floor structure and fixed with metal brackets to ensure even load transfer.

5. Detailing Work
All component gaps are filled with specialized grout to ensure airtightness and prevent corrosion. Metal connectors are painted with anti-rust paint, and wooden components are sprayed with fire-retardant coating. Waterproof strips are installed around door and window openings, and waterproof membranes are laid on the roof along with drainage systems. Some cases (such as fully assembled rural houses in Ningbo) use mechanical bolts to connect panel components, simplifying the installation process while achieving precise alignment through embedded parts, further shortening the construction period.

Through standardized prefabrication and modular assembly, the construction efficiency of rural prefabricated houses is improved by more than 50% compared to traditional methods, with better structural stability, making them suitable for rapid construction needs.