Product Introduction
A Steel Building Factory is a premium prefabricated steel structure manufactured from high-grade materials and advanced surface treatments. Designed for industrial, commercial, and agricultural applications, this building system combines exceptional structural performance with long-term durability. Every component is precision-engineered and factory-produced to ensure consistent quality, rapid assembly, and reliable service life in diverse environmental conditions.

Product Specification
|
Items |
Specification |
|
|
Main Steel Frame |
Column |
Q235,Q345 Welded H Section Steel |
|
Beam |
Q235,Q345 Welded H Section Steel |
|
|
Secondary Frame |
Purlin |
Q235 C and Z purlin |
|
Bracing |
Q235 Round Bar,Angle Steel,Steel Pipe |
|
|
Roof and wall |
Insulation |
EPS/Fiber glass wool/Rock wool/PU |
|
Sheeting |
PPGI single Sheet |
|
|
Accessories |
Windows |
Aluminum Alloy /PVC Window,etc. |
|
Doors |
Sliding/swing sandwich panel door/Roll-up Door |
|
|
Draining system |
Stainless/PPGI single sheet gutter+ PVC pipe |
|
|
Loading requirements |
As customized |
|
|
Earthquake-resistance |
9 Grades |
|
|
Life time |
Up to 50 years |
|
|
Anti-rust options |
Anti-rust painting(Alkyd/Epoxy) or Galvanized |
|
Premium Material Composition
Primary Structural Steel
The main frame utilizes Q235B or Q355B grade steel-materials selected for their superior strength-to-weight ratio and excellent weldability. These grades comply with national standards, ensuring mechanical properties that withstand heavy loads, dynamic forces, and extreme weather events. The high yield strength provides robust resistance to deformation under stress.
Cold-Formed Secondary Members
Purlins, girts, and bracing components are roll-formed from galvanized steel strip. The cold-forming process preserves material integrity while creating precise profiles with uniform dimensions. These members distribute loads efficiently and maintain structural stability across the building envelope.
Connection Hardware
Base plates, cap plates, bracing cleats, and anchor bolt assemblies are fabricated from structural-grade steel plate. Each piece is cut, drilled, and prepared for accurate field alignment without modification.

Advanced Surface Protection
Hot-Dip Galvanizing Primary frame members receive immersion in molten zinc, creating a metallurgical bond that delivers sacrificial corrosion protection. This coating system penetrates joints and edges, sealing areas vulnerable to moisture ingress. The result is extended service life in humid, coastal, or chemically exposed environments.
Protective Paint Systems Multi-layer epoxy or polyurethane coatings provide barrier protection with customizable color finishes. Surface preparation includes shot blasting to Sa2.5 standards, ensuring coating adhesion that resists peeling, chalking, and UV degradation.
Specialized Anti-Corrosion Treatments For aggressive environments, additional treatments include zinc-rich primers, aluminum-zinc alloy coatings, or fluoropolymer topcoats. These systems protect against salt spray, industrial pollutants, and temperature cycling.
Why Choose Qingdao Ruigang Heavy Industry Co., Ltd.?
Material Sourcing: Direct relationships with certified steel mills ensure consistent grade quality and competitive supply
Process Integration: Roll-forming, welding, surface treatment, and packing under unified quality management
Technical Continuity: Design engineers remain engaged through fabrication, shipment, and installation support
FAQ
Q: Delivery time?
A: Typically 30 days. Rest assured, we have a well-structured project management plan to ensure timely delivery.
Q: Installation method?
A: Our products are factory-prefabricated and require local bolted assembly. We provide detailed installation drawings. If needed, we can also send an engineer to assist.
Q: Long-term business relationship?
A: Firstly, as a direct manufacturer, we maintain competitive pricing. Secondly, we ensure accurate designs using PKPM and Tekla for easy local installation. Thirdly, we guarantee quality and never compromise on it. Lastly, we offer professional 24/7 online after-sales service.
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