The ZSJH Steel Purlin System provides strong, lightweight and economical secondary framing for steel structure buildings. Our C and Z steel purlins are manufactured from high-quality galvanized or coated steel using precision cold-forming equipment, ensuring consistent dimensions, accurate hole positions and reliable structural performance.

Steel purlins are commonly used to support roof panels and wall cladding while transferring loads to the primary steel frame. Each system can be customized according to the building drawings, span, design load, connection method and project environment.

Product Options

C Steel Purlin

C-shaped purlins are widely used as roof purlins, wall girts, door frames and secondary structural members. Their straight section makes them easy to install and suitable for single-span structures.

Z Steel Purlin

Z-shaped purlins can be overlapped at supporting points to improve structural continuity and load-bearing efficiency. They are commonly selected for industrial buildings with longer roof spans or continuous framing systems.

Main Features

• High strength-to-weight ratio

• Lightweight and easy to transport

• Accurate dimensions and hole positions

• Fast bolted installation on site

• Galvanized surface for corrosion resistance

• Suitable for roof and wall framing systems

• Reduced structural weight and construction cost

• Custom sections available according to drawings

• Compatible with insulated panels and metal cladding

• Complete accessories and connection components available

Typical Specifications

Applications

ZSJH Steel Purlin Systems are suitable for:

• Industrial workshops

• Steel structure warehouses

• Logistics and distribution centers

• Agricultural buildings

• Aircraft hangars

• Commercial steel buildings

• Manufacturing facilities

• Cold storage buildings

• Prefabricated steel buildings

• Solar mounting and supporting structures

• Roof panel supporting systems

• Wall cladding supporting systems

Precision Manufacturing

Our purlins are produced using automated cold-forming and CNC punching equipment. The manufacturing process controls section dimensions, straightness, hole spacing and surface quality to support efficient installation.

Production Process

1. Raw material inspection

2. Steel coil leveling

3. Precision cold forming

4. Cutting to required length

5. CNC hole punching

6. Dimensional inspection

7. Surface and coating inspection

8. Bundling and identification

9. Seaworthy export packaging

Customized Purlin Solutions

ZSJH Steel can manufacture C and Z purlins according to your structural drawings and bill of materials. Customization options include:

• Section dimensions

• Steel thickness

• Material grade

• Member length

• Hole size and position

• Galvanized coating

• Connection accessories

• Product identification

• Export packaging

FAQ

What is the difference between C and Z purlins?

C purlins have a straight C-shaped section and are commonly used for single-span framing, wall girts and secondary supports. Z purlins can overlap at supporting points, making them suitable for continuous roof framing and longer spans.

Can you manufacture purlins according to our drawings?

Yes. We can customize the section size, thickness, length, hole position, surface treatment and accessories according to your drawings and bill of materials.

Are the purlins supplied with pre-punched holes?

Yes. CNC pre-punched holes can be produced according to the approved fabrication drawings, reducing drilling and installation work on site.

Can you supply galvanized steel purlins?

Yes. Galvanized steel purlins are available for improved corrosion resistance. The coating requirement can be selected according to the project environment.

Do you provide connection accessories?

Yes. We can supply matching cleats, sag rods, braces, bolts and other connection components as part of a complete purlin system.