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.
Factory-Fabricated Steel Truss Components for Stadium
The circular tube truss employs an intersecting-line welding process for the tubes. It features an overall triangular truss load-bearing system with a scientifically sound and rational structural design, offering high overall stiffness and excellent load-bearing performance, enabling column-free designs for large spans. All components undergo a full-process manufacturing cycle in the factory, including cutting, welding, non-destructive testing, rust removal, and anti-corrosion coating. This ensures high dimensional accuracy and consistent quality, allowing for direct on-site hoisting and assembly, which significantly improves construction efficiency. The system is widely used in large-span industrial building roofs, bridges, stadiums, and utility tunnel projects.
Custom Steel Pipe Trusses: Efficient Prefabrication
Core Features & Advantages
Steel tubular trusses are fabricated from high-strength round tubes using precision intersecting-line welding techniques. The resulting structure forms a scientifically engineered triangular truss load-bearing system that ensures uniform load distribution and sufficient overall rigidity. With exceptional load-bearing capacity and resistance to deformation, these trusses easily enable the creation of column-free spaces with large spans. Components are prefabricated to standardized specifications in a factory setting, reducing overall project costs. When combined with professional anti-corrosion coatings, they offer excellent weather resistance and corrosion resistance, ensuring long-term stability in outdoor and complex industrial environments.
♦ Lightweight, high-strength, and cost-effective
♦ Flexible customization for a wide range of applications
♦ Corrosion-resistant and durable, with long-lasting reliability
♦ Factory prefabrication, with efficient delivery
♦ Precise craftsmanship, robust structure
Applications
Thanks to their outstanding load-bearing capacity, suitability for long spans, and efficient construction, steel tubular trusses are widely used in various construction projects with high demands on spatial and structural performance. They can provide column-free roof support for large industrial plants, production workshops, and logistics and warehousing centers, while also meeting the aesthetic and structural requirements for extra-wide roof spans in public buildings such as sports stadiums, convention centers, theaters, and cultural venues.
♦ Span support for large industrial buildings
♦ The main structure of the supporting buildings for transportation hubs
♦ Structure of Mechanical Equipment Workshops
♦ Overhead process piping in the plant area
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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INDUSTRIAL STEEL BUILDINGS
