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.
Seismic Performance of Steel Frames in High-Rise Office Buildings
Steel frame structures are constructed using portal frames and spatial trusses, creating multiple lines of seismic defense. During an earthquake, the elastic-plastic deformation of the steel effectively extends the structure’s natural vibration period, thereby mitigating the risk of resonance. The steel used in these structures possesses high ductility and toughness, enabling it to effectively withstand the impacts and deformations caused by seismic forces and enhance the overall safety of the building. Steel frame high-rise (10–100+ stories) with moment-resisting frames and composite metal deck floors. Primary steel: ASTM A992 / A572 Gr.65. Bolted connections, CNC precision. Fire-rated intumescent coating. 50+ year life. Compliant with AISC, IBC, ASCE 7.
Seismic Performance and Structural Optimization of Steel Frame Structures
Core Features & Advantages
High-performance steel structural frames, constructed using an industrialized prefabricated assembly method, combine efficient construction with superior performance. With a seismic resistance rating of Grade 9 and compliance with 3-hour fire resistance requirements, all steel materials are 100% recyclable, providing an efficient, reliable, and low-carbon solution for high-rise and large-span buildings. It combines multiple advantages such as high efficiency, safety, environmental friendliness and flexible space, making it an ideal structural solution for modern buildings.
♦ 50% faster build (5–7 days/floors);
♦ Magnitude 9 seismic resistant;
♦ 40% lighter than concrete;
♦ 12–15m clear spans;
♦ 3-hour fire rating;
♦ 100% recyclable.
Applications
The seismic performance and construction techniques of steel frame structures in high-rise buildings effectively absorb seismic energy and minimize structural damage. They are commonly used in projects such as large urban commercial complexes, hospitals, schools, transportation hubs, multi-story industrial buildings, and public venues, and are particularly suitable for projects in earthquake-prone areas and those with strict requirements for construction efficiency.
♦ Commercial offices;
♦ Residential towers;
♦ Mixed-use;
♦ Hotels;
♦ Hospitals;
♦ Government buildings.
Product Parameter
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Product name
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Customized steel structures for cement production
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Material
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Q235B, Q345B
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Surface treatment
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1. Painting; 2. Galvanized;
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Certification
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SO9001, ISO14001, OHSAS18001, EN1090, ISO3834
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Standard
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GB, ASTM, EN, ISO, AS/ANS,JIS,JWB
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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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