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Pipezy Composite Materials is not only your local sales partner, but also a leading Chinese fiberglass manufacturing company within easy reach.
What size is fiberglass C channel?
Fiberglass C Channel—also known as FRP C Channel or fiberglass structural channel—is widely used in corrosion-resistant structural systems, including industrial platforms, cable support systems, chemical plants, and marine environments.
One of the most frequently asked technical questions from engineers and buyers is: “What size is fiberglass C channel?”
The answer is not a single fixed dimension. Fiberglass C channels are manufactured in a range of standard sizes and fully customizable profiles, depending on load requirements, installation conditions, and project design.
This guide explains typical sizes, how they are defined, and how to choose the correct FRP C channel for your application.
Fiberglass C channels are typically defined by three main dimensions:
• Height (H) – overall vertical dimension
• Flange width (B) – horizontal top/bottom extension
• Wall thickness (T) – structural thickness of the profile
• Height: 25 mm – 300 mm
• Flange width: 25 mm – 100 mm
• Thickness: 3 mm – 10 mm
• 38 × 38 × 3 mm
• 50 × 30 × 5 mm
• 75 × 40 × 6 mm
• 100 × 50 × 6 mm
• 150 × 50 × 8 mm
• 200 × 75 × 10 mm
These sizes vary slightly depending on manufacturer and resin system.
Unlike steel, FRP C channel is produced by pultrusion molding, which allows flexible size customization. The size specification is usually written as:
Height × Flange Width × Thickness (mm)
For example:
● 100 × 50 × 6 mm FRP C Channel means:
• 100 mm height
• 50 mm flange width
• 6 mm wall thickness
Some suppliers may also include:
• Radius of internal corners
• Reinforcement fiber content
• Surface finish type
Most fiberglass C channels are supplied in standard lengths:
• 6 meters (most common)
• 3 meters (for small shipments or easy handling)
• Custom cut-to-length (project-based)
Longer lengths can be manufactured for large-scale structural systems, depending on transport limitations.
One of the key advantages of FRP materials is high customization capability.
Custom options include:
• Non-standard height and width
• Extra thick wall for heavy-duty load
• UV-resistant or fire-retardant formulations
• Slotted or pre-drilled channels
• Special chemical-resistant resin systems
Custom sizes are commonly used in:
• Chemical processing plants
• Offshore platforms
• Power stations
• Industrial wastewater facilities
Selecting the correct size depends on several engineering factors:
Heavier loads require:
• Higher profile (greater height)
• Thicker wall section
Longer spans need:
• Deeper channel sections to reduce deflection
• Chemical environments → vinyl ester resin
• Electrical systems → non-conductive FRP required
• Outdoor exposure → UV-resistant surface
Bolt connections, bracket systems, or welded FRP structures will influence sizing choice.
Unlike steel channels, fiberglass C channels behave differently under load:
▶ Lighter weight allows easier handling
▶ Higher deflection sensitivity at small sizes
▶ Greater design flexibility through custom pultrusion
▶ No corrosion allowance needed in sizing
This means engineers often select slightly larger FRP sections than steel equivalents to achieve similar stiffness.
Fiberglass C channel sizes are not fixed but available in a wide engineering range, typically from small 25 mm profiles up to heavy-duty 300 mm structural channels, with customizable thickness and length.
The best size depends on:
Load conditions
Span distance
Environmental exposure
Structural design requirements
For industrial projects, working with a manufacturer that can provide custom pultruded FRP channels ensures optimal performance and cost efficiency.
We manufacture high-quality FRP C channels with standard and custom dimensions for global industrial applications.
✔ Custom engineering support
✔ OEM & project-based production
✔ Corrosion-resistant structural solutions
✔ Fast quotation within 24 hours
Contact us with your drawings or requirements for professional sizing recommendations.
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Feel free to reach out for any queries. We would be happy to help!
We look forward to working with you.
Project Case Studies
We have actually solved many problems for our customers and have extremely high reliability
Project Name: Huaneng Gansu Company Zhengning 2x1000 MW Peak-Shaving Coal-Fired Power Project
Project Owner: Huaneng Group
Project Location: Zhengning County, Qingyang City, Gansu Province
Core equipment: DN4500*20000 FRP (fiberglass reinforced plastic) thickening tower ( tower #1 and tower # 2 )
Services include: equipment design, manufacturing, transportation, installation, and commissioning.
Contractor: Hebei Weitong Fiberglass Co., Ltd.
Installation of Thickening Tower at Handan Guodian East Suburb Power Plant
Project Name: Handan Power Plant Desulfurization Wastewater Zero Discharge Treatment System Project
General contractor: China Construction Energy Conservation Technology Co., Ltd. (Stock Code: 300425)
Project Location: Handan City, Hebei Province
Core equipment: DN4200*20150 FRP (fiberglass reinforced plastic) thickening tower
Services include: design, manufacturing, transportation, installation, and commissioning support for key equipment.
Contractor: Hebei Weitong Fiberglass Co., Ltd.
Installation of Thickening Tower at Shanghai Baoshan District Huaneng Power Plant
Project Name: Huaneng Shidongkou Thermal Power Co., Ltd. Desulfurization Wastewater Zero Discharge Project
Project Owner: Huaneng Shidongkou Thermal Power Co., Ltd.
Project Location: Baoshan District , Shanghai
Core equipment: DN6300*18100 FRP (fiberglass reinforced plastic) concentration tower
Services include: core equipment design, manufacturing, installation, commissioning, and technical support.
Contractor: Hebei Weitong Fiberglass Co., Ltd.
Let our team help you select the right product
Talk to our experts, we can help you meet your requirements and provide assistance for your next project.