Product Specification

High Strength Curved Edge Cold Formed C Channel | Galvanized Arc C Purlin for Solar and Steel Structures

Product Introduction

Curved Edge Cold Formed C Channel, also known as Arc C Purlin or Half Round U-Shaped Steel Section, is a customized lightweight steel profile designed for applications requiring smooth edges, accurate dimensions, and corrosion resistance.

Manufactured from Q235 carbon steel coil through continuous cold roll forming technology, the product adopts a unique curved edge design instead of traditional sharp-edge C channels. The smooth semicircular edges help reduce friction and prevent damage to connected components such as sliding pulleys, guide rollers, cables, and mechanical accessories.

Compared with hot rolled channel steel, cold formed C channel provides a lighter structure, better dimensional accuracy, and efficient material utilization. It is widely used in applications where precise fitting and easy installation are required, including solar mounting systems, sliding door guide rails, curtain wall structures, warehouse equipment rails, and greenhouse frames.

For outdoor and corrosive environments, the profile can be processed with full hot-dip galvanizing treatment, creating a uniform zinc coating of 60–120μm. The galvanized layer provides effective protection against moisture, salt spray, and chemical corrosion, ensuring reliable long-term performance in coastal areas, photovoltaic projects, and industrial facilities.

Customized production is available according to project requirements, including arc radius, channel height, flange width, steel thickness, length, and mounting hole design. Pre-punched holes can be provided for faster bolt installation and reduced on-site processing.

Technical Specifications

Product Advantages

1. Smooth Curved Edge Design

The semicircular edge structure eliminates sharp corners and provides safer contact with accessories.

Benefits:

• Reduces component wear
• Protects cables and sliding parts
• Improves assembly compatibility
• Suitable for guide rail applications

2. Lightweight Cold Formed Structure

Manufactured through cold bending technology, the C channel provides:

• Accurate dimensions
• Stable section shape
• High strength-to-weight ratio
• Efficient material usage

It helps reduce transportation and installation costs.

3. Durable Hot-Dip Galvanized Protection

The HDG surface treatment creates a protective zinc layer.

Features:

• 60–120μm coating thickness
• Strong corrosion resistance
• Suitable for outdoor environments
• Reduced maintenance requirements

4. Flexible Customization Options

The product can be customized according to engineering drawings:

• Curved arc radius
• Channel height
• Flange width
• Steel thickness
• Overall length
• Mounting hole position

5. Easy Installation

Pre-punched holes can be reserved for quick assembly.

Advantages:

• Faster bolt connection
• Reduced field processing
• Improved construction efficiency
• Better installation accuracy

Application Areas

Solar Mounting Systems

Used for:

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

Industrial Sliding Systems

Applied in:

• Sliding door guide rails
• Warehouse hanging tracks
• Mechanical equipment tracks

Building Structures

Suitable for:

• Curtain wall keels
• Lightweight steel frames
• Structural support components

Agricultural Facilities

Used for:

• Greenhouse frames
• Agricultural equipment supports

Logistics Equipment

Applied in:

• Conveyor guide systems
• Sliding storage equipment
• Warehouse rail structures

Selection Guide

1. Confirm Load Requirements

Select suitable channel thickness and dimensions according to:

• Equipment weight
• Structural span
• Installation environment

2. Choose Proper Surface Treatment

For outdoor or humid applications, hot-dip galvanized treatment is recommended for improved corrosion resistance.

3. Match Connection Design

Confirm:

• Hole positions
• Bolt specifications
• Installation method

Pre-punched holes can improve assembly efficiency.

4. Select Suitable Arc Radius

Choose the curved edge radius according to the requirements of sliding components and connected accessories.

FAQ

Q1: What is the difference between curved edge C channel and standard C purlin?

A: Curved edge C channel uses a smooth semicircular edge design, reducing friction and protecting connected components. Standard C purlin usually has straight edges and is mainly used for general structural applications.

Q2: Why choose cold formed C channel instead of hot rolled channel steel?

A: Cold formed C channel provides lighter weight, accurate dimensions, and efficient material utilization, making it suitable for solar brackets, rails, and lightweight structures.

Q3: Is hot-dip galvanizing suitable for outdoor applications?

A: Yes. The 60–120μm zinc coating provides protection against moisture, salt spray, and corrosion in outdoor environments.

Q4: Can the arc radius and dimensions be customized?

A: Yes. Arc radius, channel height, flange width, thickness, length, and hole layout can be customized according to project drawings.

Q5: How is the product installed?

A: Pre-punched mounting holes allow quick fixing with bolts and nuts, reducing on-site drilling and cutting work.