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.
Prefab Portal Frame Steel Structure Industrial Workshop Warehouse
Clear-span steel hangar engineered for Airbus aircraft (up to A380). Span 30–120m+, eave height 8–30m+. Main frame: Q355B/ASTM A572 high-strength steel with welded H-sections/box girders. Massive sliding doors up to 80m wide. Hot-dip galvanized. 50+ year life. From structural materials to overall layout, every aspect is tailored to meet the demands of large aircraft, offering high strength, excellent rigidity, and superior sealing performance, ensuring reliable and stable operation under all weather conditions. The design features an exceptionally wide span and height, fully accommodating the entry, exit, and maintenance of wide-body aircraft.
Custom Portal Steel Structures For Industrial Buildings
Core Features & Advantages
In the field of industrial architecture, steel portal frames utilize solid-web portal frames as load-bearing structures, capable of accommodating entire aircraft or large aircraft components. Structures can be designed as single-span, multi-span, or with adjoining buildings to meet the configuration requirements of different functional areas.
♦ 120m+ clear span;
♦ 80m wide doors;
♦ 100+ ton capacity;
♦ 50% faster build;
♦ 50+ year life;
♦ Crane ready.
Applications
Widely used in key takeoff, landing, and parking scenarios such as aircraft hangars, private aircraft aprons, and helicopter landing pads, it also covers aircraft repair, maintenance, and operational support facilities, as well as aviation warehouses. Additionally, it can be used to construct military shelters that meet special protection requirements, thereby comprehensively addressing the needs of multiple sectors.
♦ Aircraft hangars;
♦ Private jet hangars;
♦ Military shelters;
♦ Helicopter depots;
♦ MRO facilities;
♦ Aviation warehouses.
Product Parameter
| Products | Steel Composite Column Heavy Steel Structure Building |
| Main Material | Q235B(ASTM A36,S235JR), Q355B |
| Drawing Design | AUTOCAD /SOLIDWORKS/TEKLA |
| Surface Treatment | Painting, Galvanized |
| Process-Cutting | Laser cutting, plasma cutting, flame cutting for intricate shapes |
| Forming | Rolling, and bending to meet complex structural designs |
| Welding | MIG, TIG, Submerged arc |
| Machining | Drilling, milling for precise fittings |
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
MORE PRODUCTS
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
