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.
Large-span Agricultural Greenhouse Building
Prefabricated steel-frame greenhouses are the ideal infrastructure for large-scale, standardized fruit and vegetable cultivation. Constructed using lightweight, high-strength steel, they are lightweight yet highly load-bearing, requiring no complex foundation work and significantly reducing initial investment costs. The greenhouse structure is sturdy and durable, with simple and convenient maintenance that requires no frequent inspections, ensuring long-term, stable use. It can also be flexibly integrated with various smart farming systems—including ventilation, irrigation, shading, and temperature control—to achieve standardized management of fruit and vegetable cultivation.
Prefabricated Seedling Greenhouse Construction
Core Features & Advantages
The steel structure of large-span agricultural greenhouses employs a construction model involving prefabrication of sections in the factory and on-site assembly. The main steel components (beams, columns, and purlins) are all precision-cut and professionally welded in the factory, enabling a column-free design with large spans. This maximizes the use of interior growing space within the greenhouse, meeting the needs of large-scale fruit and vegetable cultivation; Additionally, these structures offer excellent corrosion resistance, weather resistance, and wind and snow load capacity. They provide a stable, temperature-controlled, and humid environment for crop growth, facilitate the integration of ventilation, irrigation, and shading systems, require minimal maintenance, and have a service life that far exceeds that of traditional greenhouses.
♦ Column-free, wide-span design maximizes growing space
♦ Standardized factory prefabrication and efficient on-site assembly reduce construction time
♦ High strength and lightweight construction with strong load-bearing capacity, reducing foundation costs
♦ Corrosion-resistant, weather-resistant, and capable of withstanding wind and snow; structurally stable and durable
♦ Suitable for large-scale cultivation and compatible with various greenhouse growing equipment
Applications
Large-span steel-framed agricultural greenhouses are widely used in various large-scale agricultural cultivation projects. They are suitable for a wide range of fruits and vegetables, including strawberries, tomatoes, cucumbers, peppers, and leafy greens. These greenhouses can be deployed in agricultural industrial parks, large-scale cultivation bases, family farms, and fruit and vegetable seedling centers. They enable off-season cultivation and staggered market releases while also meeting the demands of large-scale commercial production, making them the preferred solution for the large-scale development of modern protected agriculture.
♦ Large-span greenhouse projects for fruit and vegetable cultivation in agricultural industrial parks
♦ Construction of large-scale greenhouse facilities for fruit and vegetable seedling propagation
♦ Construction of large-span greenhouses for family farms
♦ Large-scale open-air greenhouse projects for fruit and vegetable cultivation
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.
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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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