Prefabricated Steel Structure Housing

Prefabricated steel structure housing is a building form that takes the steel structure system as the core and is assembled on-site with industrialized prefabricated components. Its technical characteristics, advantages, and application status are as follows:

I. Technical System and Component Composition Prefabricated steel structure housing adopts steel frame, steel frame-brace, and other steel structure systems as the main load-bearing structures. Components are manufactured in a standardized manner through industrial production. The core components include prefabricated steel beams, steel columns, floor decking, enclosure wall panels, etc. Some systems also integrate prefabricated stairs, balconies, and other auxiliary components. For example, the earthquake-recoverable rapid-assembly multi-story and high-rise prefabricated steel structure system uses modular design to prefabricate beams, columns, braces, and other components into standard units, which are then quickly connected on-site through bolts or welding, achieving a prefabrication and assembly rate of over 90%.

II. Core Advantages

1. Excellent Seismic Performance: Steel structures have good ductility and low self-weight. Under seismic action, the structure has stronger deformation capacity, can effectively absorb energy, and reduce the risk of collapse.
2. High Construction Efficiency: Industrial production reduces on-site wet operations, simplifies component hoisting and splicing procedures, and shortens the construction period by 30%-50% compared to traditional buildings. For example, the Hangzhou Qianjiang Century City Talent Special Housing Project adopted prefabricated steel structures, reducing the construction period of a single building from 18 months to 10 months.
3. Green and Low-Carbon: The recyclability rate of steel exceeds 90%, reducing the generation of construction waste. On-site operations reduce dust and noise pollution, meeting energy-saving and environmental protection requirements.
4. Flexible Space: The steel frame structure has no load-bearing wall restrictions, allowing the indoor layout to be adjusted according to needs and increasing space utilization by 10%-15%.
5. Controllable Cost: Mass production reduces component costs, and the shortened construction period reduces labor and management expenses, resulting in a comprehensive cost reduction of 5%-10% compared to traditional buildings.

III. Application Status and Policy Support China has completed typical projects such as Baotou Wanjun Metropolis and Hangzhou Qianjiang Century City Talent Special Housing, covering areas such as affordable housing and commercial housing. The "Guidelines on Vigorously Developing Prefabricated Buildings" issued in 2016 set clear promotion goals, requiring that by 2030, the application ratio of steel structures in newly started residential buildings should reach about 10%. Currently, prefabricated steel structures account for about 7% of newly built prefabricated buildings. With technological maturity and policy promotion, their market share is expected to further increase.