Prefabricated House Assembly Process

The prefabricated house assembly process is mainly divided into two parts: on-site assembly and manufacturing process, as detailed below:

On-site Assembly Process

1. Foundation Preparation
   Subsequent work is carried out on the pre-poured concrete foundation. The concrete foundation must undergo precise measurement and leveling to ensure its load-bearing capacity meets design requirements, providing a stable base for the house chassis frame.

2. Chassis Frame Construction
   Workers unload prefabricated components from transport trucks and assemble the house chassis frame on the concrete foundation. Metal connectors are fixed using electric drills and hammering, locking each joint to ensure the overall stability of the frame. This step must strictly adhere to the design drawings to ensure accurate frame dimensions and angles.

3. Floor Joist Installation
   Prefabricated beam components (floor joists) with a white coating are installed at the designed spacing. The coating is typically an anti-corrosion or fire-resistant material that extends the lifespan of the components. The joists must be horizontally aligned to provide uniform support for the subsequent floor panels.

4. Floor Panel Installation
   Large wooden panels are transported and placed over the joists to form a solid and level floor. The panels must be tightly joined to prevent excessive gaps that could lead to an uneven floor or reduced sound insulation.

5. Wall Module Installation
   Prefabricated wall modules are jointly lifted onto the platform and erected, then fixed to the base plate with nail guns after alignment. This step marks the transition of the house from a flat structure to a three-dimensional frame, requiring precise verticality and positioning of the walls.

6. Internal Partition Wall Construction
   After the exterior wall frame is enclosed, workers cut and assemble partition wall skeletons indoors. Partition walls typically use lightweight materials and must be firmly connected to the main structure, with openings reserved for doors and windows.

7. Second-Floor Floor Beam Installation
   Floor beams for the second floor are laid on top of the walls to construct the upper space. The floor beams must be securely connected to the walls to ensure the load-bearing capacity of the second-floor floor meets design standards.

8. Roof Construction
   Large triangular trusses are transported to the site, and ground and roof workers cooperate to lift and place them on the top beams of the walls. The trusses must be precisely positioned to ensure the roof slope and structural stability.

Manufacturing Process (Completed in Factory)

1. Steel Formwork Fabrication: Steel formworks are fabricated according to the detailed design drawings of prefabricated components to ensure dimensional accuracy.
2. Exterior Wall Panel Reverse Casting Process: Tiles are laid on prefabricated exterior wall panels (this step is not applicable to other components), with control over tile adhesion strength and flatness.
3. Rebar Tying and Embedded Part Installation: Rebars are tied, and embedded parts such as lifting lugs, rebar couplers, and threaded sleeves are installed to ensure the reliability of component connections.
4. Concrete Pouring and Curing: Concrete is poured and then subjected to standard curing to ensure the components reach the required strength.
5. Formwork Removal and Surface Treatment: After formwork removal, tile joints are treated, and component numbers and other markings are printed for easy identification during on-site assembly.