Production Process of Prefabricated Houses

The production process of prefabricated houses mainly includes three steps: factory prefabrication of modules, transportation of modules, and on-site assembly.

Factory Prefabrication of Modules: This is the fundamental step in the production of prefabricated houses. The building is disassembled into independent modules, which are manufactured in the factory. For example, the ceiling, walls, and waterproof layers of bathrooms in the house are all prefabricated on the factory assembly line, including key components such as ceilings, floors, and water and electricity pipelines. Some prefabricated houses adopt a method of assembling prefabricated components, such as prefabricated foundation piles and beams. Each foundation pile weighs about 5 tons and has holes reserved at the four corners for lifting. There are also those that use advanced AI numerical control and robotic arm technology for material preparation, precisely sawing pine wood, extracting the required wooden boards according to a pre-set trajectory, using robotic arms to nail the walls, and fabricating load-bearing beam frames, greatly improving the precision and efficiency of production.

Transportation of Modules: The prefabricated modules need to be transported to the construction site. This process requires professional transportation equipment and reasonable transportation planning to ensure that the modules are not damaged during transportation and can arrive at the destination safely and intact. Factors such as the size, weight, and transportation route of the modules need to be considered during transportation to select appropriate transportation tools and methods.

On-site Assembly:

• Foundation Treatment: First, the foundation at the construction site needs to be treated. Taking a case in rural South Korea as an example, an excavator clears weeds and levels the foundation. Surveyors ensure that the excavation depth and ground height meet the design requirements. After excavating about 60 centimeters down, a white plastic sheet is laid, and then a concrete pump truck is used to pour the foundation, and no steel bars are used in the foundation.
• Module Installation: The modules are assembled like building blocks. For example, when installing foundation piles and assembling beams, first install the base plates, use a drill to make holes and fix them with expansion screws, then install the foundation piles onto the cushion layer. After installing the beams, measure and adjust them horizontally and fix them with nuts. Fill the gaps with foam glue and seal the nut fixation points with cement. At a construction site of a real estate project in Shanghai, tower cranes transport the prefabricated 'building blocks' and install them in suitable positions. Each 'building block' has a detailed 'ID card'. For wooden buildings produced by AI numerical control, robotic arms extract the required wooden boards according to a pre-set trajectory for assembly.