Steel Space Frame

A Steel Space Frame is an advanced spatial structural system composed of high-grade steel members (tubular or section steel) connected via precision joints (e.g., bolt-ball nodes, welded nodes) to form a three-dimensional grid configuration. Engineered to span large column-free spaces, it excels in distributing loads uniformly across the entire structure, converting complex forces into axial tension and compression—making it a preferred choice for stadiums, exhibition centers, airport terminals, and industrial facilities. Fabricated primarily from structural steel (e.g., Q235, Q355, ASTM A500, A53), its all-steel design delivers exceptional strength-to-weight ratio, durability, and architectural flexibility.

The core advantage of the steel space frame lies in its spatial force-bearing efficiency: the three-dimensional grid structure ensures multi-directional load transfer, enabling spans of 60 to 150+ meters with minimal self-weight (only 1/5 to 1/3 of traditional concrete structures). This lightweight characteristic significantly reduces foundation costs and simplifies transportation and erection. Steel members, typically hollow tubular sections, maximize material utilization by operating in axial stress, while the grid’s triangular or quadrilateral units enhance structural stability and resistance to wind, seismic activity, and dynamic loads. Bolt-ball nodes (a common connection type) feature factory-precision machining, enabling rapid on-site assembly without complex welding, further optimizing construction efficiency.

Key features include modular prefabrication: all components (steel members, joints, fasteners) are standardized in factories with CNC machining, ensuring dimensional accuracy and consistent quality. On-site installation is streamlined via bolted connections or modular segment lifting, shortening construction cycles by 30%-50% compared to traditional truss structures. Corrosion protection is achieved through hot-dip galvanization, epoxy coatings, or fluorocarbon spraying, while fire-resistant treatments extend service life to 50+ years—even in harsh coastal or outdoor environments. The system’s architectural versatility allows for flat, arched, or curved profiles, adapting to diverse design needs while maintaining structural integrity.

Typical applications span stadium roofs, convention center halls, airport terminal canopies, industrial workshop ceilings, and high-speed railway stations. Balancing long-span capability, lightweight design, and efficient construction, the steel space frame is a cornerstone of modern large-span construction, aligning with green building and industrialized construction trends while meeting stringent safety and performance standards worldwide.