Multi-story Light Steel Structure Building

A Multi-story Light Steel Structure Building is an advanced construction system designed for 2-6 story buildings, utilizing cold-formed light-gauge steel or hot-rolled light steel (1.2-3.5mm thick for framing, reinforced sections for columns/beams, e.g., Q355, ASTM A36/A572, S355JR) as the primary load-bearing framework. Integrated with high-performance insulation, fire-resistant sheathing, and modular wall/roof systems, it balances structural stability, space flexibility, and construction efficiency—ideal for office buildings, residential apartments, hotels, schools, hospitals, and commercial complexes. Unlike traditional brick-concrete or reinforced concrete buildings, it excels in vertical load transfer while maintaining lightweight advantages.

The core advantage lies in multi-story adaptability and structural integrity: the optimized steel framework (with reinforced columns and composite floor systems) efficiently bears vertical loads (8-25kN/㎡) and lateral forces (wind, seismic), supporting 2-6 story structures with spans of 8-20 meters per floor. The steel’s high ductility ensures earthquake resistance (up to magnitude 8.0) and wind resistance (up to 12-level), complying with global building codes. The enclosed building envelope, filled with high-density insulation (rock wool, polyurethane foam) and equipped with energy-efficient windows, achieves superior thermal insulation (U-value ≤ 0.35 W/(㎡·K)) and soundproofing (≥ 45 dB), reducing energy consumption by 30%-45% compared to traditional multi-story buildings.

Key features include modular prefabrication and rapid assembly: all steel components (wall frames, floor trusses, roof systems, stairs) are factory-produced with CNC precision, ensuring dimensional accuracy and consistent quality. On-site assembly uses bolted connections, eliminating wet work—completing a 3-5 story, 500-1500㎡ building in 20-40 days, 50%-60% faster than concrete structures. The lightweight design (1/3 lighter than concrete) reduces foundation requirements (strip, raft, or pile foundations), lowering foundation costs by 20%-30% and adapting to urban lots or restricted terrains. The flexible structural design supports open floor plans, movable partitions, and future renovations, catering to diverse functional needs (office cubicles, residential units, classroom layouts).

Typical applications span multi-story residential apartments, office buildings, boutique hotels, primary/secondary schools, community hospitals, commercial malls, and urban renewal projects. With a service life of 60+ years (enhanced by hot-dip galvanization or powder coating anti-corrosion treatments), low maintenance needs, and 90% steel recyclability (minimizing construction waste ≤ 5%), the multi-story light steel structure building has become a preferred choice for efficient, sustainable urban construction, aligning with the demand for space-saving, eco-friendly, and cost-effective multi-story developments worldwide.