Large Span Steel Frame Building and Prefabricated Steel Structure with Customizable Design and Fireproof Performance for Industrial Workshops

A prefabricated industrial building engineered for large complete equipment sets and long assembly lines. Built on a national-standard heavy portal frame steel system, it is optimized for large-span column-free load bearing — delivering major gains in space utilization, equipment layout, ventilation, daylighting and structural stability compared with ordinary factories. All components are factory-prefabricated and site bolt-connected, providing high structural rigidity and an extra-wide open interior suited to large production lines and heavy equipment assembly projects.

Light-frame steel construction hangar design, prefabricated steel structure factory buildings, workshops and warehouses.

A pre-engineered steel building is a modern construction method in which the complete design is carried out at the factory, and the building components are then delivered to site and fixed or jointed on site. All connections are bolted — no welding is required.

An efficiently designed pre-engineered building can be up to 30% lighter than conventional steel buildings. Lighter weight means less steel consumption and potential cost savings in the structural framework.

The main load-bearing frame uses Q345B (S355JR) H-section steel columns and roof main beams, with special structural calculation for large-span loads. Purlins are Q235B (S235JR) hot-dip galvanized Z/C steel with anti-corrosion and anti-deformation performance. Main steel members are produced by automatic submerged arc welding, sandblasting rust removal and multi-layer industrial anti-corrosion coating. A complete bracing system guarantees overall stability against wind, snow and vibration from large equipment. The enclosure system can be specified with A1 fireproof rock wool sandwich panels and insulated color steel sheets offering fire, heat and dust resistance. A high-strength waterproof system is adopted on the roof. Heavy-duty wear-resistant flooring can be applied for large equipment and heavy forklift movement.

1. 1Column-free large-span design with spans up to 24–48 m and eave heights of 8–15 m — no intermediate column obstruction for ultra-long production lines and large unit assembly. The professionally calculated structure meets wind, seismic and snow load requirements for safe long-term production.
2. 2Free interior layout to divide ultra-long assembly zones, material storage zones, finished goods zones and wide access passages, greatly improving production layout efficiency.
3. 3Factory-prefabricated steel components assembled on site — much faster construction than traditional buildings for rapid commissioning. Light weight reduces foundation work.
4. 4Ridge ventilators and wide daylighting belts are optional to exhaust hot air and smoke while providing abundant natural lighting.
5. 5Full industrial fire protection available. Fire partitions, sprinklers and hydrant systems can be arranged to pass fire inspection.
6. 6Modular whole structure allows span extension for continuous capacity expansion.

Large equipment assembly workshops, new energy equipment plants, wind turbine assembly workshops, construction machinery assembly workshops, and integrated production & storage factories. Suitable for large equipment and long assembly line continuous production.

The large-span steel factory features an unobstructed wide interior space and a reliable structure with good ventilation and daylighting. Compared with ordinary small-span factories, it removes column restrictions for large equipment assembly, has a short construction time and an expandable layout — serving as the preferred industrial building solution for large equipment manufacturing projects.

As a professional steel structure solution provider, we deliver a full-cycle, one-stop service covering every phase from initial inquiry to final project completion, supporting your project with reliable efficiency and professional expertise.

We hold full engineering qualifications, including the professional contracting qualification for steel structure engineering and the construction work safety permit, and have established three standardized management systems: ISO 9001 Quality Management System, ISO 14001 Environmental Management System and ISO 45001 Occupational Health and Safety Management System.

Our full product portfolio — steel structure buildings, modular light steel houses and container houses — has all been tested and verified by authoritative third-party institutions. The scope covers UL certification, CE certification, Australian certification for rock wool, certifications for fiber cement boards and glass wool, as well as core performance indicators including structural mechanics, fire & corrosion resistance, thermal & acoustic insulation, waterproof sealing and fatigue life, strictly complying with national building codes and industry standards.

For export products, we have obtained a full set of international certifications such as EU CE and EN 1090, which fully adapt to the engineering requirements and trade regulations of all regions worldwide, providing all-round guarantee for compliant project delivery and consistent quality.

Upon receiving your project requirements, our engineering team will provide feedback on drawing approval within 24 hours. We assign a dedicated specialist for 1-on-1 consultation to fully understand your project specifications, local construction codes and budget expectations. Our team will tailor the structural design, optimize material usage and propose the most cost-effective solution that perfectly fits your actual needs.

With standardized production management and a mature fabrication workflow in our own factory, we guarantee a 25-day fast delivery cycle for regular projects. To date, we have successfully delivered over 300 steel structure projects worldwide, accumulating rich experience in cross-border trade and overseas project implementation. All components go through strict quality inspection before delivery and are shipped together with complete construction drawings, detailed installation manuals and guidance videos.

We provide 7*24 hours uninterrupted technical support throughout the whole project cycle. Whenever you encounter technical problems during installation or construction, our professional team will respond promptly and offer targeted solutions. We strictly implement safety management systems in both production and construction links, and have maintained a zero safety incident record all along, ensuring your project is carried out smoothly and safely.

Beyond fabrication and delivery, we also offer optional on-site installation guidance upon request to assist your on-site team with key construction procedures. From design, production and logistics to after-sales support, we take charge of every detail, providing you with a truly hassle-free one-stop steel structure solution.

1. 1Customer Inquiry
2. 2Targeted Design & Formal Quotation
3. 3In-depth Communication & Customized Solution
4. 4Plan & Contract Confirmation
5. 5Standardized Factory Fabrication
6. 6Delivery (components + construction drawings + installation videos)
7. 7Optional On-site Installation Guidance
8. 8Project Completion