Permanent Prefabricated Housing

Permanent prefabricated housing is a form of architecture that involves the industrial production of building components and their on-site assembly, offering long-term residential attributes. Its technology encompasses prefabricated concrete and steel structures, providing advantages such as shortened construction periods and reduced pollution, enabling sustainable living.

Technical Composition and Typical Forms

The core technologies of permanent prefabricated housing include prefabricated concrete structures and steel structures, with components such as beams, slabs, walls, and columns being prefabricated products. Its typical forms are divided into three categories:

1. Steel Structures: Characterized by lightness and high strength, they are suitable for overseas transportation and high-rise buildings, representing one of the strengths of Chinese enterprises. For example, some prefabricated houses exported overseas adopt steel structures for easy and rapid assembly and disassembly.
2. Concrete Structures: These are closer to traditional living experiences and have high acceptance in the domestic market. For instance, the prefabricated shear wall residential system developed by Vanke Group enhances construction efficiency through the standardized production of prefabricated components.
3. Wooden Structures: Although widely used in some countries, the comparative advantage of Chinese enterprises lies in the first two categories, with wooden structures accounting for a relatively low proportion.

Technological Evolution and Performance Enhancement

China's prefabricated concrete technology began in the 1950s, initially used for factory and residential construction, and saw a resurgence in the 21st century due to environmental protection needs. New prefabricated houses have addressed traditional issues through technological iterations:

• Seismic Resistance: The steel-concrete monolithic pouring technology significantly enhances structural stability, with some cases meeting seismic fortification requirements of magnitude 8.
• Construction Efficiency: The construction period is shortened by 30% compared to traditional methods. For example, the prestressed prefabricated concrete frame system used in the Nanjing Jindi Yufang project enables rapid construction.
• Environmental Protection: The industrial base in Fujian Province reduces construction waste by over 70% through prefabrication technology, promoting the industry's green development.

Market and Policy Support

1. International Market: The export of Chinese-made prefabricated houses has grown significantly. In the first four months of 2026, the Guangzhou Customs District exported 1.4 billion yuan worth of movable houses (a year-on-year increase of 38.1%), and the Shenzhen Port exported 1.68 billion yuan worth (a year-on-year increase of 19.6%), reflecting increased international recognition.
2. Domestic Policy: Since 2022, the renovation policy has been implemented, focusing on repairing prefabricated panel houses and only demolishing those deemed unsafe, indirectly indicating that some prefabricated houses still possess long-term usability.

Application Cases and Future Directions

The practices of enterprises such as Vanke Group and Nanjing Jindi Yufang demonstrate that prefabricated houses have evolved from early low-standard panel houses to safe, efficient, and environmentally friendly permanent residences. In the future, with the popularization of BIM technology and intelligent production lines, personalized design and cost optimization of prefabricated houses will become key focuses, further expanding their applications in affordable housing, emergency buildings, and other fields.