C/Z Purlins are lightweight cold-formed structural steel sections widely used as secondary framing members in steel structure buildings.

They are mainly installed between the main steel frames to support roofing sheets, wall cladding, insulation systems and other building envelope components.

C purlins feature a C-shaped cross section and are commonly used for shorter spans and simple structural layouts. Z purlins have a Z-shaped profile that allows sections to overlap at supports, making them particularly suitable for continuous-span roof and wall systems.

Manufactured from galvanized or high-strength structural steel, our C and Z purlins provide an excellent combination of high strength, lightweight construction, corrosion resistance and fast installation.

Different dimensions, thicknesses, lengths, hole positions and surface treatments can be customized according to project drawings.

C Purlin & Z Purlin

C Purlin

C purlins are widely used as roof purlins, wall girts and secondary structural members.

Typical applications include:

• Steel workshops

• Steel warehouses

• Industrial factories

• Equipment shelters

• Agricultural buildings

• Prefabricated steel buildings

• Solar support structures

C sections are particularly suitable for applications where simple connections and straightforward installation are required.

Z Purlin

Z purlins are designed for continuous structural systems and can overlap at the supporting steel frames.

This configuration helps improve structural continuity and load distribution.

Z purlins are commonly used in:

• Large-span industrial buildings

• Warehouse roofing systems

• Factory roof structures

• Logistics centers

• Commercial steel buildings

• PEB buildings

• Large steel structure projects

Product Specifications

Main Advantages

1. High Strength-to-Weight Ratio

Cold-formed C and Z sections provide excellent structural performance while keeping the overall steel weight relatively low.

2. Lightweight Structure

Compared with heavier structural steel sections, purlins reduce secondary framing weight and make transportation and installation easier.

3. Corrosion Resistance

Galvanized steel options provide reliable corrosion protection for roofing and wall support systems.

4. Fast Installation

Pre-punched holes and customized lengths allow purlins to be installed quickly using bolts and standard steel structure connections.

5. Flexible Customization

Section dimensions, thickness, length, hole position and surface treatment can be customized according to your drawings.

6. Suitable for Large Steel Buildings

Z purlins can be overlapped at structural supports, making them suitable for continuous-span systems and larger industrial buildings.

7. Reduced Construction Time

Factory-manufactured sections arrive ready for assembly, helping reduce cutting, drilling and secondary processing on the construction site.

8. Economical Steel Solution

Optimized cold-formed sections can reduce material consumption while maintaining the required structural performance.

Roof Purlin Application

In steel structure roofing systems, C or Z purlins are installed horizontally between the primary steel rafters.

Their main functions include supporting:

Roof sheets → insulation → waterproofing systems → roof accessories → external roof loads

The purlins transfer these loads to the main steel frame.

For larger industrial buildings, Z purlins are often selected because overlapping sections can create a more continuous structural system.

Wall Girt Application

C and Z sections can also be used as wall girts.

Wall girts are installed between steel columns to support:

• Metal wall panels

• Sandwich panels

• Insulated wall systems

• Exterior cladding

• Interior wall systems

Manufacturing Process

Our typical C/Z purlin manufacturing process includes:

Raw Material → Coil Preparation → Cold Forming → Straightening → Cutting → Hole Punching → Dimensional Inspection → Surface Inspection → Packing → Delivery

Automated cold-forming equipment helps maintain consistent profile dimensions and production efficiency.

FAQ

Q1: What is the difference between C purlin and Z purlin?

C purlins have a C-shaped cross section and are commonly used for simple roof and wall framing systems. Z purlins have a Z-shaped section and can overlap at supports, making them suitable for continuous-span structures.

Q2: Can you manufacture C/Z purlins according to our drawings?

Yes. Dimensions, thickness, length, punching position and other details can be customized according to your drawings and structural requirements.

Q3: Can you provide galvanized purlins?

Yes. Galvanized C and Z purlins are widely used because they provide improved corrosion resistance for steel building applications.

Q4: Can holes be punched before delivery?

Yes. Bolt holes and connection holes can be pre-punched according to your fabrication drawings, reducing additional work at the construction site.

Q5: What information should I provide for a quotation?

For a more accurate quotation, please provide the section size, steel grade, thickness, length, quantity, surface treatment and project drawings if available.

Q6: Are C/Z purlins suitable for industrial warehouses?

Yes. C and Z purlins are widely used in warehouses, workshops, factories, logistics centers and other industrial steel buildings.