Prefabricated Reinforced Concrete House
A prefabricated reinforced concrete house is a type of dwelling constructed using prefabricated reinforced concrete modules, combining factory production with on-site assembly. It features structural safety, efficient construction, and cost-effectiveness, but has limitations such as high costs for customized designs and the need for careful product selection.
1. Outstanding Structural Safety The house employs a "full-frame shear wall" design, with a framework composed of φ10-φ14 national standard deformed steel bars and integrated pouring with C35 concrete. Each module weighs over 20 tons, with wall thicknesses ranging from 150-200mm and floor thickness of 120mm. It exhibits excellent seismic performance, capable of withstanding magnitude 8 earthquakes (with a designed seismic fortification intensity of 7 degrees). Under a Category 12 typhoon, the prestressed bolt connections between modules remain secure. The concrete has a fire resistance limit exceeding 3 hours, demonstrating significant fire safety. For example, during the Gansu Jishishan earthquake, 2,000 relief houses were constructed within 72 hours, with simulated tests showing a displacement of only 3 centimeters, verifying their structural stability.
2. Significantly Improved Construction Efficiency Through the "factory production + on-site assembly" model, the factory prefabrication stage takes only 7 days for a single module (30㎡). During on-site installation, a 50-ton crane, assisted by 3 workers, can complete the lifting of a single module in 4 hours. A 100㎡ house can be fully installed in just 1 day, reducing the construction period by 90% compared to traditional methods. The modules come pre-installed with water and electrical conduits, allowing immediate use upon connection on-site and minimizing secondary construction steps.
3. Clear Economic and Environmental Advantages For a 120㎡ rural self-built house, the main structure of an assembled concrete house costs between 120,000 and 150,000 yuan, saving 30% compared to traditional brick-and-mortar structures. The construction period is 3 days, a 97.5% reduction from the traditional 120 days. Construction waste amounts to only 1.5 tons, a 90% decrease from the traditional 15 tons. Wholesale market prices range from 220 to 1,100 yuan per square meter, with some products priced at over 300 yuan per square meter and offering a 70-year warranty, resulting in lower long-term usage costs.
4. Combination of Practicality and Flexibility The modules support flexible assembly to meet different area requirements. Some products come with pre-installed insulation layers, reducing heating costs in winter. However, customized designs incur an additional 20% cost (e.g., for rounded balconies). It is essential to select brands that provide a 70-year warranty and seismic reports to ensure quality and avoid safety hazards caused by improper product selection.
