1. Safety as the Bottom Line: Outstanding Seismic and Disaster Resistance Performance

Steel exhibits excellent ductility, tensile strength, and compressive strength. The yield strength of high-strength steels such as Q390 can reach more than 10 times that of ordinary concrete. Combined with innovative systems like steel frame-buckling-restrained steel plate shear walls, the seismic performance is improved by 20% compared with traditional structures. In complex geological conditions such as high seismic intensity zones and subsidence areas, steel structures absorb energy through plastic deformation, achieving the safety goal of "no collapse in major earthquakes and repairable in moderate earthquakes". A prime example is the stable operation of Qingdao Huastrong's prestressed steel structure wind power towers in subsidence areas for nearly four years. In addition, the self-weight of steel structures is only one-third of that of concrete structures, significantly reducing foundation loads and adapting to diverse geological environments such as soft soil and collapsible loess.

2. Efficient Construction Empowerment: Dual Optimization of Construction Period and Cost

Steel structures adopt the "factory prefabrication + on-site assembly" model, featuring high mechanization and no weather restrictions. The construction period is shortened by 30%-50% compared with traditional concrete structures. Shougang's "Near-Zero-Carbon Good Houses" utilize modular construction and the "four floors lifted at one time" technology, with the main structure installation of a single floor taking only 2 days and the overall construction period reduced by over 50%. The wall flatness error is controlled within 3 millimeters, far exceeding traditional construction standards. For large-span projects, steel truss and space frame systems can achieve 100-meter-level span coverage. The over 330-meter main span of the National Stadium "Bird's Nest" and the super-large space design of Beijing Daxing International Airport both demonstrate its absolute advantage in spanning capacity. Moreover, the spatial layout is not restricted by load-bearing walls, enabling 100% flexible adaptation to functional adjustment needs.

3. Leading Green and Low-Carbon: Full Lifecycle Environmental Control

Steel structures are typical carriers of the circular economy, with a steel recovery rate of over 90%. The main materials of Shougang's steel structure residential buildings are 80% recyclable, reducing construction waste from the source. In terms of low-carbon emission reduction, Shougang's "Near-Zero-Carbon Good Houses" achieve a 60% reduction in carbon emissions compared with the benchmark through technologies such as distributed photovoltaics, high-efficiency heat pumps, and energy-saving enclosure systems. The annual power generation of roof photovoltaic panels can meet the full electricity demand of public areas. Combined with water resource recycling systems and environmental protection coating technologies, steel structure buildings reduce carbon emissions by over 40% during the construction phase and 30% in full lifecycle energy consumption compared with traditional concrete buildings, perfectly aligning with the "dual carbon" goals and green building standards.

4. Flexible and Diverse Shapes: Adapting to Full-Scenario Application Needs

Steel has strong processability and can achieve complex shapes such as curves and curved surfaces. The twisted shape of the Canton Tower and the dome structure of the National Centre for the Performing Arts both highlight the shape flexibility of steel structures. From super high-rise buildings (steel frame-concrete core tube system of Shanghai Tower) to industrial plants (portal frame structures), from bridge projects (steel structure sections of the Hong Kong-Zhuhai-Macao Bridge) to emergency buildings (modular mobile houses), steel structures cover full scenarios including commerce, residential, energy, and transportation through diverse systems such as steel frames, trusses, and composite structures. International projects such as SoFi Stadium in Los Angeles, USA, and American Dream Mall in New York further confirm its global adaptability in large-scale complex projects.