Pentagonal House Prefabrication

Pentagonal house prefabrication is an industrialized residential construction method that utilizes factory-based production and rapid on-site assembly, characterized by efficient construction, strong earthquake resistance, and good cost-effectiveness.

Production Methods and Component Types

Pentagonal house prefabricated components are typically formed in factories through one-time reinforced concrete casting, creating an integrated structure that includes four walls and one floor slab. For example, the box-structure multi-story residential building system developed by the Beijing Zhongjian Institute of Architectural Science and Technology employs this process to produce pentagonal box-type components. These components cover functional units such as living rooms, lounges, and stairwells, with supporting components including prefabricated stair sections, gable insulation panels, and interior partition panels, meeting the diverse needs of residential construction.

Construction Characteristics and Advantages

1. Rapid Construction: After prefabrication in the factory, components are transported to the site and installed layer by layer using cranes. For instance, the main structure of a six-story residential building covering 3,000 square meters can be installed in just one week, significantly shortening the construction period.
2. Superior Earthquake Resistance: Components are cast as a whole and treated with sliding isolation points during installation, combined with layered welding and tenon-and-mortise connections, enabling resistance to earthquakes of magnitude eight or higher and ensuring structural safety.
3. Outstanding Cost-Effectiveness: Components are lightweight, requiring less concrete and steel, with construction costs comparable to or slightly lower than brick-and-concrete structures. Additionally, the short construction period further reduces overall costs.
4. Increased Usable Area: Under the same building area, pentagonal house prefabricated components can increase the usable area by more than 5%, optimizing space utilization.

Connection Methods and Structural Assurance

Component connections employ a combination of layered welding and tenon-and-mortise techniques: boxes on the same floor are welded and fixed through embedded parts at the top corners and connecting steel plates to ensure horizontal stability; boxes on different floors are connected using flexible tenon joints, which transmit loads while allowing slight displacement, enhancing earthquake resistance.

Application Cases and Promotion

The prefabricated fully-assembled box-type modular houses (Chengtou Country Villas) developed by Shandong Chengkai Yuanda Company use box-type components as assembly units, achieving rapid construction through reliable on-site connections, with advantages such as high quality and affordable pricing. The box-structure technology developed by the Beijing Zhongjian Institute of Architectural Science and Technology has been transferred to provinces and cities including Beijing, Shanxi, Shaanxi, Hebei, and Shandong, promoting the popularization of industrialized housing.