Prefabricated Steel Structure Houses for Multi-story Building Construction
Multi-story prefabricated steel structure buildings represent advanced green industrialized construction solutions. These systems utilize high-strength steel as the core material, following integrated design and modular coordination principles. Components are standardized and prefabricated in factories, then assembled on-site to create two-story or higher building structures suitable for residential, office, commercial, and industrial applications.
Product Overview
These buildings exemplify the integration of modern construction industrialization with steel structure technology, aligning with national guidelines for energy conservation, low-carbon environmental protection, and efficient construction. Key characteristics include prefabrication, modular assembly, and multi-story layouts, distinguishing them from traditional cast-in-place concrete buildings and single-story steel structures.
Technical Specifications & Components
The product employs precast steel components as the core load-bearing system, featuring precision-machined elements that undergo factory pre-treatment for corrosion and fire resistance. On-site assembly utilizes bolt connections and joint welding to create complete structural systems adaptable to various design requirements including steel frames, steel frame-bracing, and staggered trusses.
Structural Components Breakdown
| Component Name |
Common Section Forms |
Common Material |
Applicable Span/Height |
Main Force Characteristics |
Typical Application Scenarios |
| Steel Column |
H-section steel, Box column, Circular tube column, Cross column |
Q235B, Q355B |
Floor height 3-12m |
Axial compression, Compression-bending |
Columns of shopping malls, office buildings, exhibition halls, 4S stores |
| Main Beam |
H-section steel, Welded H-section steel, Variable-section H-section steel |
Q235B, Q355B |
6-18m |
Bending, Shearing |
Main load-bearing beams of commercial floors and roofs |
| Secondary Beam |
H-section steel, C/Z-section steel, High-frequency welded H-section steel |
Q235B, Q355B |
3-9m |
Bending |
Floor slab support, Roof purlin support |
| Roof Purlin |
C-section steel, Z-section steel, Z-type lap joint |
Q235B, Q355B |
Spacing 1.5-3m |
Bending, Local stability |
Commercial roof, Wall enclosure support |
| Roof Bracing/Tie Rod |
Circular steel tube, Angle steel, Channel steel |
Q235B |
Arranged with bays |
Lateral displacement resistance, Stability |
Roofs of large-span shopping malls, exhibition halls, factories |
| Crane Beam (if any) |
Welded H-section steel, Truss type |
Q355B |
According to crane tonnage |
Bending, Fatigue |
Logistics warehouses, Maintenance areas of 4S stores |
| Composite Floor Deck Beam |
Closed/open floor deck + Steel beam |
Q235B, Q355B |
Span 2-4m |
Composite bending |
Multi-storey commercial buildings, office buildings, composite floor slabs |
| Portal Frame Inclined Beam |
Variable-section welded H-section steel |
Q355B |
18-36m |
Compression-bending, Large span |
Supermarkets, exhibition halls, warehouses, large commercial spaces |
| Truss/Grid Structure |
Steel tube truss, Bolted spherical grid |
Q235B, Q355B |
30-80m+ |
Axial tension/compression, Large space |
Exhibition centers, gymnasiums, atrium roofs |
| Canopy/Cantilever Eaves |
H-section steel, Box beam, Steel tube truss |
Q235B, Q355B |
Cantilever 3-12m |
Bending, Wind resistance |
Entrance canopies, corridors, commercial facades |
| Stair/Steel Stair |
I-beam, Checkered plate, Square tube |
Q235B |
-- |
Bending, Shearing |
Commercial evacuation stairs, Outdoor steel stairs |
Core System Components
- Precast steel columns (H-beams, box columns, circular tube columns)
- Precast steel beams (H-beams, variable cross-section welded steel beams)
- Precast floor decks (steel truss floor decks)
- Precast support components
- Precast enclosure wall panels (sandwich wall panels, composite lightweight wall panels)
Advantages & Features
1. Superior Structure: High-strength and tough steel provides excellent earthquake and wind resistance, while its lightweight yet high load-bearing capacity reduces foundation costs.
2. Efficient Construction: Simultaneous factory prefabrication and on-site assembly significantly shorten construction time compared to traditional methods, enabling rapid completion and operation, and improving return on investment.
3. Flexible Design: Layout, span, and floor height can be flexibly adjusted to create spacious, column-free spaces, adapting to various scenarios and facilitating future renovations, additions, and functional upgrades.
4. Controllable Quality: Standardized factory production eliminates human error; components and anti-corrosion and fireproofing treatments meet national standards, ensuring building durability and safety.
5. Significant Benefits: Low long-term maintenance costs; separate pipelines facilitate maintenance; and integration with photovoltaics and green building materials achieves energy conservation and emission reduction, balancing economic efficiency and environmental protection.
