Roof & Facade Profiles — C Purlins, Z Purlins, Omega & Hat Sections from Turkey
Steeling.net supplies cold-formed roof and facade steel profiles from Turkish manufacturers to construction companies, steel building contractors, and wholesale distributors worldwide. Our range includes C purlins, Z purlins, omega profiles, and hat sections — the core secondary steelwork components for industrial and commercial building envelopes.
All profiles are cold-roll formed from hot-dip galvanized or plain steel coil to custom depths and thicknesses. Standard and project-specific profiles available — free quote for bulk orders.
Get a Free Quote for Roof Profiles
Profile Types
C Purlins
Most common roof purlin. C-shaped cross-section for attachment to rafter or portal frame. C100 – C300 mm depth.
Z Purlins
Z-shaped profile that allows lapping over supports for continuous span efficiency. Z150 – Z300 mm depth.
Omega Profile
Hat-shaped (Ω) section used as wall rails, facade battens, and intermediate stiffeners.
Hat / Top Hat Section
Inverted hat profile for cladding rails, liner trays, and acoustic ceiling systems.
Roof Profile Specifications
| Profile | Depth Range | Thickness | Steel Grade | Finish |
|---|---|---|---|---|
| C Purlin | 100 – 300 mm | 1.5 – 4.0 mm | S250GD, S350GD | Galvanized Z275 / plain |
| Z Purlin | 150 – 300 mm | 1.5 – 4.0 mm | S250GD, S350GD | Galvanized Z275 / plain |
| Omega Profile | 30 – 120 mm | 1.0 – 3.0 mm | S250GD, S350GD | Galvanized Z275 |
| Hat / Top Hat | 30 – 100 mm | 0.8 – 2.5 mm | S250GD, S350GD | Galvanized Z275 / PPGI |
Applications
- Roof purlins for portal frame industrial buildings and warehouses
- Wall rails and side rails for external cladding systems
- Facade support rails for insulated panel systems
- Eave beams and ridge members in metal building systems
- Solar panel substructure mounting rails
- Agricultural and livestock building secondary framing
C vs. Z Purlins — Which to Choose?
C purlins are the simpler and more common option — each span is a single member supported at its ends. Z purlins are designed to be overlapped at intermediate supports, creating a semi-continuous span that significantly reduces deflection and material consumption for longer spans (typically over 6 m). For most industrial building projects, Z purlins offer better structural efficiency at longer rafter spacings, while C purlins are preferred for shorter spans and simpler framing.
Request Pricing — Free for Buyers
Frequently Asked Questions
What is the difference between C and Z purlins?
C purlins have a symmetrical C-shaped cross-section and are used as simply-supported single-span members. Z purlins have an asymmetric Z-shape that allows them to be overlapped at intermediate supports, creating a continuous span effect that is more efficient for longer rafter spacings (typically 6 m or more). Z purlins are generally preferred for larger industrial buildings where span efficiency reduces overall steel weight.
What thickness is typically required for roof purlins?
Purlin thickness depends on span length, load requirements, and profile depth. Common thicknesses range from 1.5 mm for short spans under light loads to 4.0 mm for heavy-load or long-span applications. Structural calculations are required to specify the correct thickness for each project. We can supply to a specified design or assist with standard profiles if you provide your span and load data.
Are profiles supplied galvanized?
Yes. Most roof and facade profiles are supplied from galvanized coil (Z275 coating — 275 g/m² of zinc per EN 10346). This provides long-term corrosion protection suitable for typical building envelope environments. Plain (black) steel and PPGI (pre-painted) options are also available for specific applications.
Can profiles be custom-cut to project lengths?
Yes. Profiles are roll-formed and cut to length as part of the production process. Project-specific lengths (typically from 1 m to 14 m) can be ordered with ±5 mm cutting tolerance. Custom hole punching and slotted holes for purlin brackets are also available on request.