Prefabricated House Framework

The prefabricated house framework is a framework system in prefabricated assembled buildings that uses prefabricated beams and columns as the core load-bearing structures. It features industrial production and efficient construction, and is widely applied in multi-story buildings and modular scenarios.

Structural Composition and Functions

The prefabricated house framework is formed by connecting prefabricated beams and columns with steel bars to create an overall framework that bears the vertical (such as self-weight and live loads) and horizontal (such as wind and earthquake) loads of the building. The walls are made of lightweight materials (such as foam concrete blocks and hollow bricks), serving only as enclosures and partitions without participating in structural load-bearing. This design reduces the load on the framework while providing flexibility for the internal space layout of the building.

Technical Types and Characteristics

1. Prefabricated Concrete Framework: This includes cast-in-place, assembled, and fully assembled types. Some components (such as beams and slabs) can be prestressed to enhance load-bearing capacity.
2. Steel Framework: Using steel as the main material, it is suitable for industrial construction, featuring high strength and light weight, and is commonly used in high-rise buildings or large-span structures.
3. Hybrid Framework: Combining the advantages of steel and reinforced concrete, such as the combination of steel columns and concrete beams, it balances economy and seismic performance.

Construction Advantages

• Industrial Production: Components are prefabricated in factories and assembled on-site, reducing on-site wet operations (such as concrete pouring) and significantly shortening the construction period. For example, the Nanjing Jindi Yufang project adopted a prestressed prefabricated concrete assembled integral framework, greatly improving construction efficiency.
• Quality Control: Factory production reduces human errors, ensuring high precision of components and stable overall structural performance.
• Environmental Protection and Economy: Standardized production of components reduces material waste. After the 21st century, due to environmental demands and technological advancements, assembled frameworks have been widely applied in the residential sector (such as the shear wall residential system developed by Vanke Group).

Application Scenarios and Seismic Resistance

• Applicable Scenarios: Multi-story industrial plants, high-rise civil buildings, and other scenarios with high load requirements, as well as modular buildings (such as the prefabricated housing industrial base promoted by policies in Fujian Province).
• Seismic Design: Cast-in-place concrete frameworks have good integrity and can meet seismic requirements with reasonable design; assembled frameworks require node connection design (such as cast-in-place prefabricated joints) to ensure stability. For example, rural prefabricated houses in South Korea adopt mortise-and-tenon structures for rapid connection, balancing efficiency and structural safety.

Economy and Cases

Prefabricated frameworks reduce production costs through component standardization, making them suitable for large-scale promotion. For example, rural prefabricated houses in South Korea use 5-ton prefabricated foundation piles and footplates for fixation, completing the main structure in 14 days, demonstrating a balance between construction efficiency and economy.