YOUR STEEL STRUCTURE ENGINEERING EXPERT
We are a steel structure fabricator and EPC contractor based in Jining, Shandong, China, with 17 years of experience since 2009 and delivered projects in 60+ countries. Shandong Shijie Heavy Industry Co., Ltd. and its sister company, Henan Hengfeng Steel Structure Engineering Co., Ltd., operate as one manufacturing group under the same ultimate ownership. SynJect is the group’s export brand.
Outdoor Stadium Large Span Steel Roof
Vertical steel trusses in industrial buildings can be used as vertical supports, transfer floors, and large-scale truss structures. They significantly enhance the overall stiffness and stability of high-rise buildings, improve the structure’s seismic resistance, wind resistance, and load-bearing capacity, and ensure the safe and reliable operation of super-high-rise structures under complex loading conditions. Over the course of long-term use, steel truss structures—thanks to the superior properties of high-quality steel and a scientifically designed corrosion protection system—continue to maintain stable structural performance even when subjected to extreme weather conditions and complex operating environments, thereby laying a solid foundation for the safe operation of industrial buildings throughout their entire lifecycle.
The Large-span Spatial Grid Structure of the Grandstand Roof
Core Features & Advantages
The grandstand roof features a large-span spatial truss structure. Constructed primarily from high-strength steel and designed with a spatial truss load-bearing system, it offers high overall rigidity and stability, enabling column-free coverage over a large span and maximizing the viewing experience for spectators. Construction employs a standardized factory prefabrication and on-site modular assembly approach, effectively eliminating complex on-site processes such as welding and painting. This shortens the construction timeline and reduces safety risks associated with outdoor and high-altitude work.
♦ Extra-wide span, column-free design for an optimal spectator experience
♦ Rational load-bearing structure and high stability, suitable for a wide range of complex climatic conditions
♦ Flexible design adaptable to various grandstand roof configurations, including irregular and curved shapes
♦ High precision in factory prefabrication and efficient on-site construction, reducing construction risks
Applications
The large-span spatial grid structure is suitable for various sports stadium roof projects that require spacious spectator viewing areas and quick construction. It can be widely applied in professional sports venues, fitness centers, and various sports complexes, and is the preferred structural solution for the roof of modern stadiums.
♦ Professional football field and track stadium grandstand roof projects
♦ Comprehensive gymnasium grandstand ceilings and shading structures
♦ Renovation and construction of grandstands for sports venues in universities and primary/secondary schools
♦ Roof systems for fitness centers and sports parks
♦ Portable grid-roofed grandstands for outdoor event venues and temporary grandstands
Product Parameter
| Material | Qualified S355 S460 H section steel |
| Company Certification | JIS GB CE AISC |
| Welding workers | Certified welding workers. |
| Product surface process | Galvanized painting or as required. |
| Working life | Long durability |
| Package | steel fixed pallet |
Vision & Mission
We are committed to providing safe, efficient, and environmentally friendly solutions for global customers through continuous technological innovation and exceptional product quality, driving industry progress and collectively creating a better future.
CONTACT
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SHANDONG SHIJIE HEAVY INDUSTRY CO., LTD
Headquartered in the High-Tech Development Zone of Jining, Shandong Province, Shandong Shijie Heavy Industry Co., Ltd. and its sister company, Henan Hengfeng Steel Structure Engineering Co., Ltd., operate as a unified manufacturing group under the same ultimate ownership. Globally, we deliver our end-to-end solutions through our dedicated export brand, SynJect.
Drawing on 17 years of export expertise and a proven track record across more than 60 countries, we provide integrated EPC contracting and heavy fabrication. This global reach is backed by our robust manufacturing footprint: an 80,000 m² facility with an annual capacity exceeding 500,000 tons, RMB 120 million in registered capital, and a skilled workforce of over 600 professionals.
Our core expertise spans civil construction, petrochemical facilities, long-distance pressure pipelines, heavy steel structures, pressure vessels, and skid-mounted refueling stations.
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