What is the Prefabricated Structure of a House

A prefabricated structure of a house refers to a building form where building components are industrially produced and assembled on-site. It is also known as modular construction or prefabricated assembly construction. The core idea is to break down the building into independent modules, complete the integrated prefabrication and acceptance of structures, walls, utilities, and finishes in a factory, and then transport them to the construction site for assembly.

Main Types and Forms

Prefabricated structures can be divided into three categories based on assembly methods:

1. Panel Assembly: This type primarily uses prefabricated wall panels, floor slabs, and other components, which are assembled on-site to form the main body of the building. It is suitable for multi-story residential buildings or public buildings.
2. Box Assembly: In this approach, entire rooms or functional units (such as bathrooms and kitchens) are prefabricated as 'box' modules and directly hoisted and combined. This is commonly seen in standardized buildings like hotels and apartments.
3. Frame Assembly: This type focuses on prefabricated beams and columns as the structural framework. After on-site installation, walls are filled in, offering high flexibility and suitability for high-rise buildings or complex structures.

The material forms of prefabricated houses mainly include three types:

• Steel Structure: Using steel as the framework, it is lightweight and has strong earthquake resistance but comes with higher costs. It is mostly used in industrial plants or high-rise buildings.
• Concrete Structure: This adopts prefabricated concrete components (such as prefabricated slabs and beams). It has lower costs and good durability, making it the mainstream choice for residential buildings.
• Wooden Structure: Made from wood as the raw material, it stands out for its environmental friendliness but has weaker fire and moisture resistance. It is commonly found in low-rise residential buildings or vacation villas.

Core Advantages

1. Efficiency Improvement: The construction period is shortened by 30%-60%, and on-site labor is reduced by about 50%, significantly lowering labor and time costs.
2. Quality Control: Factory-standardized production eliminates human errors, achieving millimeter-level precision in components and far superior quality stability compared to on-site pouring.
3. Environmental Protection and Energy Efficiency: It reduces construction waste by more than 70%, lowers on-site noise and dust by 80%, and decreases construction water consumption by 60%, meeting green building standards.
4. Maintenance Convenience: Modular design facilitates later renovation or maintenance, such as replacing prefabricated walls or upgrading piping systems.

Limitations

Prefabricated structures impose stringent requirements on industrial foundations, necessitating a complete technical system (such as BIM collaborative design), production system (automated production lines), and industrial clusters (supply chain support). A lack of standardized module libraries or skilled installation teams may lead to increased costs or construction delays.

This model reconstructs the construction process through industrial thinking and is an important direction for the future construction industry to transform towards high efficiency and low carbon.