All-Steel Frame Prefabricated House

An all-steel frame prefabricated house is a type of building that uses a steel structural system as its main load-bearing structure and adopts a prefabricated construction method. It can be specifically divided into the following two categories and offers significant advantages:

I. Typical Structural System and Components Taking the earthquake-recoverable, quickly assembled, multi-story prefabricated steel structural system as an example, its core structure is a steel frame-bracing structural system, which is paired with prefabricated components to achieve efficient construction. Specifically, it includes:

1. Main Structure: The steel frame and bracing structure work together to provide lateral resistance and vertical load-bearing capacity. The bracing structure enhances the overall stiffness and reduces deformation under seismic action.
2. Prefabricated Components:
   • Floor Slabs: Steel-ribbed prestressed concrete composite slabs are used, combining factory prefabrication with on-site assembly to shorten the construction period.
   • Walls: Sandwich concrete composite exterior wall panels (integrating insulation, heat insulation, and waterproofing) and concealed-frame concrete composite interior wall panels (lightweight and high-strength) are both produced to standardized specifications.
   • Stairs: Prefabricated stair modules are directly installed, reducing on-site wet work. This type of system can achieve a prefabrication and assembly rate of over 90%, significantly improving construction efficiency and quality.

II. All-Steel Frame Prefabricated Houses for Rural Residences Taking customized steel-structured rural residences (prefabricated villas) as an example, their characteristics include:

1. Material Properties: G550 galvanized aluminum-zinc and galvanized light-steel villa keels are used, which have cold-formed thin-wall properties, strong corrosion resistance, and a service life exceeding 70 years.
2. Construction Efficiency: The construction period for buildings up to three stories is only 30 days, much shorter than that of traditional brick-and-mortar structures.
3. Performance Advantages:
   • Disaster Resistance: Steel has high strength and is non-combustible, capable of withstanding strong winds, fires, and lightning. Its high ductility makes it an excellent choice for seismic design, as it is less likely to collapse during earthquakes.
   • Environmental Friendliness: Steel has a recycling rate of 86%, with a high overall industrial recycling rate, reducing construction waste.
   • Energy Efficiency: Walls are unaffected by temperature and humidity, reducing air conditioning energy consumption and lowering electricity bills.
   • Design Flexibility: The steel frame allows for large-span spaces and straight walls, supporting a variety of architectural styles.

III. Comprehensive Advantages All-steel frame prefabricated houses achieve short construction periods, high product quality, energy efficiency, environmental protection, and low costs through standardized design, factory production, and prefabricated construction. They are particularly suitable for post-disaster reconstruction, rural residences, and multi-story buildings, representing an important direction in the development of modern building industrialization.