Heavy Steel Structure

A Heavy Steel Structure refers to a high-strength construction system composed of thick-gauge structural steel components (thickness ≥ 16mm, e.g., Q355, Q460, ASTM A572, S460JR/S690QL), designed to withstand extreme loads, large spans, and harsh operating conditions. Core components include heavy steel columns, welded plate girders, cruciform columns, box-section members, and reinforced trusses, integrated to form robust load-bearing frameworks for super high-rises, long-span bridges, heavy-industry facilities, and large public structures. Unlike light steel structures, it prioritizes ultimate load capacity, rigidity, and fatigue resistance for demanding engineering scenarios.

The core advantage lies in superior structural performance and extreme load adaptability: crafted from high-tensile steel grades, heavy steel structures efficiently bear axial compression (up to 10,000kN), bending moments (exceeding 50,000kN·m), and dynamic loads (e.g., machinery vibrations, bridge traffic). Their large cross-sectional dimensions (columns ≥ 500×500mm, beams with web height ≥ 600mm) enable spans of 30-100 meters and support super high-rises above 100 meters, outperforming concrete structures in both strength-to-weight ratio (40% higher) and ductility. This combination ensures resistance to earthquakes (up to magnitude 8.5), strong winds, and cyclic loads, making it ideal for critical infrastructure and heavy industrial use.

Key features include precision fabrication and industrial-grade durability: components are manufactured via hot rolling, CNC cutting, and submerged arc welding, with strict quality control through non-destructive testing (ultrasonic, radiographic inspection) to ensure weld integrity. Modular prefabrication reduces on-site work, while high-strength bolted or welded connections guarantee structural rigidity. Corrosion protection solutions (hot-dip galvanization, epoxy coal tar coatings, weathering steel) and fire-resistant treatments (intumescent coatings, concrete encasement) extend service life to 70+ years, even in coastal, industrial, or high-temperature environments.

Typical applications span super high-rise building cores and frames, long-span bridges (main girders and piers), heavy-industry plants (steel mills, power stations), large stadiums and exhibition centers, offshore platforms, and heavy-load warehouses. As a cornerstone of large-scale engineering, heavy steel structures balance structural safety, design flexibility, and long-term reliability, enabling the realization of ambitious architectural and industrial projects that push the boundaries of construction technology.