Product Specification

Anti-Corrosion HDG Hat Type Cold Formed Steel Section | High Strength Roof & Wall Purlin for Steel Structures

Product Introduction

Hat type cold formed steel section, also known as hat section purlin, is a high-performance structural profile designed for industrial buildings, solar mounting systems, and lightweight steel construction. Manufactured from Q235 carbon steel coil through continuous cold roll forming technology, the product features a unique hat-shaped cross section with double upturned flanges, providing improved bending resistance and structural stability.

Compared with traditional C purlins, the hat section design offers a wider support surface and optimized load distribution. The special flange structure helps improve compression performance and resistance against external forces such as wind pressure and roof loads, making it suitable for large-span roof systems and heavy-duty building structures.

The steel profile can be treated with full hot-dip galvanization, forming a uniform zinc protective layer of 60–120μm. This coating effectively protects the steel substrate from moisture, salt spray, oxidation, and industrial corrosion. It is suitable for long-term outdoor applications, including coastal areas, photovoltaic projects, agricultural facilities, and humid factory environments.

To meet different engineering requirements, we provide customized manufacturing services. Section height, flange width, steel thickness, total length, and mounting hole positions can be adjusted according to project drawings. Pre-punched round or slotted holes are available to simplify bolt installation and improve construction efficiency.

Technical Specifications

Product Advantages

1. Enhanced Structural Strength

The hat-shaped profile provides improved rigidity and load distribution compared with standard steel channels. It helps withstand roof pressure, wind loads, and long-term structural stress.

2. Durable Hot-Dip Galvanized Protection

The HDG coating creates a protective barrier against corrosion.

Key benefits:

• 60–120μm zinc coating
• Strong adhesion
• Good salt spray resistance
• Suitable for outdoor environments

3. Lightweight and Material Efficient

Cold formed production allows precise section design with reduced material consumption while maintaining structural strength, helping reduce transportation and installation costs.

4. Customized Engineering Solutions

Available customization options include:

• Section height
• Flange width
• Steel thickness
• Overall length
• Mounting hole position

This allows the product to match different construction designs.

Application Areas

Industrial Buildings

Used as roof and wall purlins for:

• Steel workshops
• Factory buildings
• Large-span structures

Solar Mounting Systems

Suitable for:

• Ground photovoltaic brackets
• Solar support frames
• Outdoor PV structures

Agricultural Structures

Applied in:

• Greenhouse roof frames
• Livestock farm buildings
• Agricultural steel structures

Warehouses and Logistics Facilities

Used for:

• Warehouse enclosure systems
• Roof support structures
• Lightweight steel frames

Selection Guide

When selecting a suitable hat section purlin, consider the following factors:

1. Load Requirements

Select section size and thickness according to:

• Roof weight
• Snow load
• Wind pressure
• Structural span

2. Environmental Conditions

For coastal, humid, or corrosive environments, choose hot-dip galvanized profiles with suitable zinc coating thickness.

3. Installation Method

Confirm required:

• Hole position
• Connection method
• Bolt specifications

Pre-punched holes can improve installation efficiency.

4. Structural Compatibility

Ensure the hat section dimensions match the supporting structure, including roof panels, brackets, and connection accessories.

FAQ

Q1: What is the difference between hat section purlin and C purlin?

A: Hat section purlin features a hat-shaped profile with double upturned flanges, providing higher rigidity and better compression resistance. C purlin is commonly used for lighter structural applications.

Q2: Is hot-dip galvanizing suitable for outdoor projects?

A: Yes. The 60–120μm zinc coating provides corrosion protection for outdoor environments such as solar farms, coastal areas, and industrial buildings.

Q3: Can the size and hole layout be customized?

A: Yes. Section dimensions, thickness, length, and pre-punched hole positions can be customized according to engineering drawings.

Q4: What materials are available?

A: The standard material is Q235 carbon steel, which provides good strength, weldability, and structural performance.

Q5: How are hat section purlins installed?

A: Pre-punched holes allow fast connection using bolts and nuts, reducing cutting and drilling work during construction.

Q6: What packing options are available?

A: Products can be packed with plastic bags or cartons for safe transportation and storage.