Prefabricated House with Steel Structure

The steel-structured type of prefabricated houses uses a steel structural system (such as steel frames, steel frame-bracing, etc.) as the core load-bearing structure, constructed through prefabricated building methods. These houses have characteristics such as earthquake resistance, efficiency, and cost-effectiveness, but they also have limitations such as difficulty in renovation.

Significant Advantages in Structural Performance

The earthquake resistance of steel structures is more than 50% higher than that of traditional brick-and-mortar structures, with a seismic fortification intensity of up to eight degrees, achieved through integral connections or high-quality materials. The material recyclability rate exceeds 90%, and the service life can reach 90 years, far exceeding the average lifespan of brick-and-mortar structures. Additionally, steel structures are lightweight, reducing foundation loads and lowering foundation treatment costs, making them particularly suitable for areas with complex geological conditions or frequent earthquakes.

Substantial Improvement in Construction Efficiency

The use of factory-prefabricated components and on-site assembly construction significantly shortens the construction period. For example, the main structure of a three-story, 150-square-meter house can be completed in 5 days, with full decoration delivered within 2 months, compared to 6-8 months for traditional brick-and-mortar structures. Factory production also reduces on-site wet operations, lowering environmental pollution such as dust and noise, aligning with the requirements for green building development.

Long-Term Consideration of Cost and Economy

The initial construction cost is 10%-30% higher than that of brick-and-mortar structures (an increase of approximately 150-500 yuan per square meter), but the overall lifecycle cost is lower. For example, a 200-square-meter house with a light steel structure costs approximately 356,000 yuan, while a brick-and-mortar structure costs about 390,000 yuan (including hidden costs such as project delays and temporary housing). Over the long term, steel structures have lower maintenance costs and higher residual values upon demolition, gradually demonstrating their economic advantages.

Gradual Expansion of Application Scenarios

In China, steel-structured houses have been applied in affordable housing projects (such as Baotou Wanjun Metropolis) and commercial housing projects (such as Hangzhou Qianjiang Century City talent-specific housing). In rural markets, there are also products such as light steel villas and assembled houses, with price ranges from 480-1280 yuan per square meter (as quoted by manufacturers in Cangzhou, Hebei, and Heze, Shandong), meeting the needs of low-rise residential buildings.

Limitations to Be Noted

Standardized production results in fixed floor plans, making later renovations difficult (such as pre-embedded water and electricity pipelines and fixed decoration modes). Additionally, market acceptance is affected by quality issues with early prefabricated panel houses. Currently, steel-structured houses account for about 7% of newly built prefabricated buildings in China, with national plans to increase the proportion of steel structures in newly started residential buildings to about 10% by 2030. Future improvements in market recognition will require technological innovation and policy guidance.