What is the difference between C channel and U channel?

C-channels and U-channels are both rolled steel profiles widely used in construction and engineering, but they differ in shape and function. Read on to learn more.

1. C-Channel (C-Section)
C-channels feature a cross-section shaped like the letter "C," with a flat back (web) and two flanges extending perpendicularly. The flanges may face outward or inward, depending on the application.

Thanks to their structural strength and rigidity, C-channels are ideal for framing, beam supports, and load-bearing applications. The open or closed side also allows for easy mounting and assembly.

2. U-Channel (U-Section)
U-channels have a "U"-shaped cross-section, consisting of a flat base and two vertical legs of equal length.

They are typically used for edge protection, guiding, or framing — such as around glass panels, sheet metal edges, or as decorative trim. Their simple, uniform profile makes them well-suited for non-load-bearing applications.

Conclusion
C-channels are preferred for structural strength and support, while U-channels are better suited for containment and edge protection. Choosing between the two depends on your project's load requirements and intended function.

Union Steel Industry Co., Ltd is professional structrual steel manufacturer, for more details, please contact:sales@union-steels.com