Heavy Zinc Galvanized Steel Strip – Purlin & Cold Framing Grade
Product Overview
Heavy zinc coated galvanized steel strip is the standard feedstock material for cold-formed C/Z purlins, wall girts and light structural framing systems. Built on structural grade steel with heavy hot-dip galvanized coating, it delivers high load-bearing strength, excellent cold formability and long-term atmospheric corrosion resistance. This grade is optimized for roll formed building framing, providing reliable structural support and durability for industrial and commercial building envelopes.
Why Choose CNB Purlin Grade Galvanized Strip?
We supply purlin-grade galvanized strip from leading structural steel mills with strict control over zinc coating mass, mechanical properties and dimensional consistency. Our precision slitting lines deliver exact width strips with burr-free edges, ensuring smooth running on high-speed purlin roll forming lines. We offer both standard and high strength grades with various zinc coating weights to match different load, span and corrosion requirements.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | Heavy Zinc Galvanized Steel Strip for Purlin |
| Base Steel Grade | S250GD / S350GD structural grade |
| Zinc Coating Mass | Z180 – Z275g/m² (double side) |
| Thickness Range | 1.5mm – 3.0mm |
| Width Range | 100mm – 600mm (precision slit) |
| Width Tolerance | ±0.3mm |
| Coil Inner Diameter | 508mm / 610mm |
| Coil Weight | 3MT – 8MT per coil |
| Bend Performance | 180° cold bend without coating cracking |
| Applicable Standards | EN 10346, GB/T 13793 |
Core Advantages
- Heavy corrosion protection: Z180-Z275 zinc for long-term purlin service life.
- High strength options: S350GD grade enables longer spans and lighter framing.
- Precision slit widths: Exact dimensions for direct roll forming line feeding.
- Cold formable: Excellent bend performance without zinc flaking or cracking.
- Consistent quality: Uniform coating and mechanical properties for stable production.
Applications
This galvanized purlin strip is widely used for C/Z purlin manufacturing, wall girts, cold-formed channel sections, light structural framing, building envelope support systems and general cold-formed construction components.
Get a Quotation
We supply purlin-grade galvanized steel strip in various strength grades and zinc coating weights. Custom slitting and coil configuration options are available upon request. Contact our construction materials team for a competitive quotation.
