HDG Rectangular Steel Tube – Solar Mounting Column Grade
Product Overview
Hot-dip galvanized rectangular steel tube is the standard vertical support component for ground and elevated solar mounting systems. Manufactured from structural steel with full inside-outside hot-dip galvanizing, it delivers reliable compressive strength, torsional rigidity and comprehensive corrosion protection. This standard grade is optimized for solar array support columns and pile top posts, providing consistent structural performance and long outdoor service life for all types of photovoltaic installations.
Why Choose CNB Solar Column Tubes?
We supply solar column tubes from certified structural steel mills with strict control over straightness, wall thickness uniformity and zinc coating quality. Every tube undergoes full dimensional and coating inspection to ensure reliable structural performance. We offer value-added fabrication including base plate welding, end preparation and pre-punching, delivering ready-to-install posts that reduce on-site labor and construction time.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | Hot-Dip Galvanized Solar Column Tube |
| Steel Grade | Q235B / Q355B structural steel |
| Zinc Coating | Z80 – Z180g/m² (inside & outside) |
| Wall Thickness | 2.0mm – 6.0mm |
| Size Range | 40×40 – 200×200mm square / 60×120 – 150×300mm rectangular |
| Standard Lengths | 3m – 12m, custom cut |
| Fabrication Options | Base plate welded, pre-punched, end capped |
| Straightness Tolerance | ≤1.5mm per meter |
| Applicable Standards | ASTM A500, GB/T 6728 |
| Typical Service Life | 15–25 years depending on coating |
Core Advantages
- Full corrosion protection: Inside-outside galvanizing for complete post protection.
- Structural reliability: Consistent wall thickness and strength for vertical load support.
- Fabrication ready: Pre-welded and pre-punched options for fast installation.
- Wide size range: Covers small residential to large utility solar projects.
- Proven solar performance: Standard column solution for PV mounting systems worldwide.
Applications
This galvanized rectangular tube is widely used for ground solar array support columns, solar carport posts, elevated PV structures, pile top adapters and general photovoltaic vertical support components.
Get a Quotation
We supply solar column tubes in various sizes, grades and coating weights with value-added fabrication options. Project-specific post design and structural calculations are available upon request. Contact our solar steel team for a detailed quotation.
