Steel Tubular Truss

A Steel Tubular Truss is a premium spatial structural system composed entirely of high-grade steel tubular members (circular, rectangular, or square hollow sections) connected at nodal joints to form triangular or polygonal truss configurations. Engineered specifically for large-span, column-free applications, it excels in resisting axial tension, compression, and multi-directional forces, making it a cornerstone of modern architecture—from stadiums and airports to exhibition centers and industrial facilities. Fabricated from high-strength structural steel (e.g., ASTM A500, A53, Q355, Q460, S355JR), its all-steel tubular design delivers superior mechanical performance compared to mixed-material or open-section trusses.

The core advantage of the steel tubular truss lies in its structural synergy of steel and tubular form: high-strength steel provides exceptional tensile and compressive strength, while the hollow tubular cross-section ensures optimal stiffness-to-weight ratio—enabling spans of 40 to 200+ meters with minimal self-weight. This lightweight characteristic reduces foundation loads, simplifies transportation, and lowers on-site erection costs, outperforming concrete trusses or solid-steel structures in efficiency. The tubular shape also offers superior torsional stability and resistance to buckling, while circular sections feature aerodynamic profiles that minimize wind load and vortex-induced vibration—critical for large-span open-air structures.

Key features include precision steel fabrication: tubular members are cut, bent, and welded using advanced techniques (orbital welding, submerged arc welding) to ensure dimensional accuracy, with nodal joints connected via bolted flanges or welded connections—validated through non-destructive testing (NDT). Modular prefabrication of truss segments enables off-site assembly, streamlining on-site installation via cranes or lifting systems. The closed steel tubular sections offer inherent corrosion resistance, enhanced by hot-dip galvanization, epoxy coatings, or weathering steel finishes, while fire-resistant treatments extend service life to 50+ years in harsh environments. The hollow interior of tubes also accommodates utilities (cables, pipelines), enhancing functional versatility.

Typical applications span stadium roofs, airport terminals, convention center halls, industrial workshop canopies, long-span bridges, and architectural landmarks. Balancing high load-bearing capacity, lightweight design, and architectural flexibility, the steel tubular truss empowers engineers to realize ambitious, column-free spatial designs while meeting stringent safety, performance, and durability standards for large-scale construction projects worldwide.