Construction of Steel Structure Prefabricated Houses

Steel structure prefabricated houses adopt a factory-prefabricated and on-site assembly model, offering advantages such as fast construction, green and low-carbon operations, and flexible space utilization. Their construction process is divided into two main stages: factory prefabrication and on-site assembly, with technical features encompassing standardization, intelligence, and precision.

I. Core Construction Process

1. Factory Prefabrication Stage

• Structural Decomposition and Standardization: Buildings are decomposed into standardized modular units using digital twin technology (e.g., the Beijing Sanlihe project was decomposed into 156 modules), enabling component versatility and interchangeability.
• Process Integration and Precision Control: Over 90% of processes, including structural pouring, insulation treatment, pipeline embedding, and interior decoration, are completed in smart factories. After millimeter-level precision inspection, they are transported to the site, reducing on-site wet operations.
• Digital Management: Each module is assigned a unique 'digital identity code' to record production data throughout the process. Upon delivery, a 'one-house-one-code' digital archive is formed, marking the locations of pipelines and equipment for easy maintenance.

2. On-site Assembly Stage

• Foundation Construction: Depending on the requirements of frame or single-story bent structures, square/rectangular independent foundations are used, which are shallow in depth, economical in material usage, and short in construction period, adapting to different geological conditions.
• Module Hoisting and Assembly: Through high-precision hoisting technology (e.g., the Beijing project completed all module hoisting and main structure封顶 in just 46 days), modules are rapidly connected using bolts or welding.
• Quality Acceptance: Professional institutions conduct non-destructive testing and bolt connection inspections, while supervision units ensure project reliability through on-site inspections to guarantee structural safety.

II. Technical Advantages

1. Efficiency Improvement

• Construction period reduced by approximately 75% (e.g., the Beijing project was completed from vacating to delivery in less than 6 months), with a high degree of industrialization (e.g., the 32-story main structure in Hangzhou was completed by 60 workers in 58 days).
  2. Green and Low-carbon
• On-site waste reduced by 75%, material loss decreased by 25%, and carbon emissions reduced by 30%; steel is recyclable, and the full lifecycle carbon emissions are lower than those of concrete structures.
  3. Space Optimization
• Lightweight structure with small beam-column sections increases usable area by 5% to 8%; supports customized design on a 'one-house-one-policy' basis (e.g., the Beijing project offers 6 housing types).
  4. Intelligent Adaptation
• Combines digital design and simulation technology to optimize production and transportation plans; coating engineering ensures rust prevention through environmental temperature and humidity control.

III. Typical Application Scenarios

• Urban Renewal: Building 28 in Block 1 of Beijing Sanlihe was rebuilt in situ using MiC technology, solving plumbing issues in old residential areas.
• Rural Resettlement: Yuhuang Community in Mianyang, Sichuan, adopted prefabricated light steel structure rural houses, balancing simplicity in appearance with interior transparency.
• High-rise Buildings: The Hangzhou Qianjiang Century City project rapidly completed the 32-story main structure through an industrialized model, verifying the technical feasibility.