Galvanized C & Z Purlin
Cold-Formed Steel Purlins & Girts
Hot-dip galvanized C & Z purlins for steel roof & wall systems. C80-C300, Z100-Z350. Pre-punched, pre-cut to length. CE certified, mill direct.
Product Overview
C and Z purlins are the backbone of steel building roof and wall systems. Our cold-formed galvanized purlins are roll-formed from high-strength structural steel with hot-dip galvanized coating (Z275 minimum) for long-term corrosion resistance — ideal for industrial, commercial, and agricultural steel buildings.
C purlins are typically used for simple-span applications where lapping is not required, while Z purlins feature sleeved or overlapped connections for continuous-span design — reducing material weight and cost. Both profiles are available with pre-punched holes for swift bolted installation.
All purlins are manufactured to precise tolerances on automated roll-forming lines. Custom lengths, punching patterns, and notch details can be programmed for your specific project. Standard lead time: 15–30 days depending on project size.
Technical Specifications
| Profile Types | C Purlin (C80-C300), Z Purlin (Z100-Z350) |
| Steel Grade | Q235B, Q355B, G450, G550 (per AS/NZS 4600) |
| Coating | Hot-dip galvanized Z275 (275g/m²), Z350 available |
| Thickness | 1.5mm — 3.0mm (16ga — 10ga) |
| Length | Custom cut to project requirements (max 12m single piece) |
| Holes | Pre-punched bolt holes per project drawings |
| Splice Option | Z purlin: sleeved connection for continuous span |
| Standard | GB/T 6725, EN 10162, AS/NZS 4600 |
| Packing | Bundled with steel strapping, FCL/LCL ready |
Not sure how many tons of C/Z purlins your roof needs? Add up the purlin and frame tonnes for your roof. Our quotation is FOB China.
Key Features
Applications
Typical Delivery Timeline
From design approval to site delivery
Engineering Design
Calculation reports, shop drawings, erection manual
1–2 weeksFabrication
CNC cutting, welding, shot blasting, coating
4–6 weeksShipping
Container loading, ocean freight to your port
2–4 weeksSite Erection
Bolt-together assembly with remote guidance
4–8 weeksProduction lead time: 15–30 days depending on project size; shipping and installation time vary by destination and site. Rush production available.
Why Choose Laotie Steel?
A team with 15+ years of export experience, trusted by buyers in 30+ countries
CE (EN 1090), TÜV & ISO 9001
Every product is CE (EN 1090), TÜV and ISO 9001 certified. Mill test certificates (MTC) are provided with every shipment.
5,000 Tons Monthly Capacity
Factory with 5 production lines, about 5,000 t/month. Whether you need a 500 m² workshop or a 50,000 m² industrial complex, we deliver on time.
30+ Countries Served
Export experience across Southeast Asia, Middle East, Africa, Australia, and South America. We design to your local building code: AS/NZS, BS 5950, EN 1993, AISC, or GB 50017.
Full Engineering Package
Structural calculation reports, detailed shop drawings, and erection manuals included with every order. Our engineers use Tekla, SAP2000, and STAAD.Pro for precision design.
Factory-Direct Pricing
No middleman markup. You buy directly from the manufacturer. Typical savings of 30–50% compared to local fabrication, even after shipping and duties.
Team with 15+ Years of Export Experience
Based in Shangqiu, Henan — China's steel manufacturing hub. Projects in 30+ countries. Every bolt, plate, and member is labeled and match-marked for rapid assembly.
Frequently Asked Questions
Common questions about galvanized c & z purlin
What is the difference between C and Z purlin?
C purlins are used for simple spans where lapping isn't needed. Z purlins have sleeved connections for continuous span design, reducing material weight.
What zinc coating is standard?
Z275 (275g/m2) hot-dip galvanized is standard. Z350 available for coastal environments.
Can you pre-punch holes?
Yes. Holes are punched per your project drawings — no site drilling needed.
What steel grades are used?
Q235B, Q355B, G450, G550 depending on span and loading requirements.
How long does production take?
Standard lead time: 15–30 days depending on project size.
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Ready to Start Your Project?
Send us your project requirements and drawings. Our engineering team will provide a detailed quotation with structural calculations within 24 hours.