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Profile solution for mounting and support systems.
C-shaped steel comes in various specifications, with common models ranging from C50 to C280. The section height, width, thickness, and flange size can be selected according to usage and load requirements.
Common Specifications and Dimensions
C-shaped steel is usually named according to section height. Common specifications include:
C80: Section height 80mm, typical size such as C80×40×20×2.5 (height × width × flange × thickness), theoretical weight about 3.925 kg/m, suitable for light roof purlins and wall beams.
C100: Section height 100mm, e.g., C100×50×20×3, weight about 5.652 kg/m, suitable for medium-sized industrial building purlins.
C140-C200: Section height 140-200mm, mostly used in medium-sized industrial buildings and platform structures, with stronger bearing capacity.
C220 and above: Suitable for heavy-load structures, large equipment supports, and photovoltaic supports.
C280: Section height 280mm, weight can reach 11.304 kg/m, suitable for projects requiring high load capacity and weather resistance.

C Channel Steel is a standardized cold-formed steel profile, widely adopted in building electromechanical seismic bracing, photovoltaic mounting systems, general construction supports, mechanical equipment frames and storage rack structures. Featuring a scientific integrated section structure, precise groove design, uniform force distribution and outstanding load-bearing performance, it serves as the core base material for assembling all types of seismic brackets and mounting support systems.
C-shaped steel adopts a professional structural composition of web, flanges and flange edges, with each dimension directly determining structural performance. The standard specification format: C height×width×flange edge×thickness (Example: C80×40×15×2.5 = 80mm web height, 40mm flange width, 15mm flange edge width, 2.5mm thickness, weight ≈ 4.71kg/m).
Section Dimension Function: Web height (h) determines load-bearing capacity; Flange width (b) enhances overall rigidity; Flange edge width (c) improves structural stability; Thickness (t) affects structural strength and overall weight
Material: Q195, Q235B, Q345 carbon steel; high-strength grade up to G350–G450 MPa (Q235B as mainstream for seismic & PV projects)
Surface Treatment: Black steel (standard bare finish), Electro-galvanized, Hot-Dip Galvanized (HDG), Dacromet, Spray-coated/painted; covers dry indoor, humid outdoor, underground and high-corrosion scenarios
Mainstream Sizes: 41*21mm, 41*41mm, 41*62mm (specialized for seismic bracing & PV brackets); custom sectional sizes available
Thickness Range: 1.5mm / 2.0mm / 2.5mm / 3.0mm
Processing Technology: Cold rolling, precise punching, fixed-length cutting, flat edge deburring for accurate tolerance
Supporting & Customization: Fully compatible with spring nuts, hinge connectors, pipe clamps and full set of seismic accessories; custom punching spacing, length and non-standard sizes supported
Material: Q235B Carbon Steel
Surface Treatment: Electro-galvanized, Hot-Dip Galvanized (HDG), Dacromet
Standard Sizes: 41*21mm, 41*41mm, 41*62mm (mainstream seismic & PV specifications)
Thickness: 1.5mm / 2.0mm / 2.5mm / 3.0mm
Processing: Cold rolling, precise punching, straight cutting, flat edge deburring
Supporting Fittings: Matched with spring nuts, hinge connectors, pipe clamps and all seismic accessories
Customization: Custom size, punching spacing and length available
High Structural Stability: Integrated forming, uniform force bearing, not easy to deform
Modular Matching: Universal standard groove, compatible with all conventional seismic support accessories
Excellent Corrosion Resistance: Multiple surface treatments for indoor, outdoor, underground and coastal environments
Easy Installation: No on-site welding, quick bolt assembly, save construction time
Wide Adaptability & Classified Usage: Multi-scene classified application, covering construction (roof purlins, wall beams, platform structures), machinery (equipment frames, small C40/C50 sections), warehousing (storage rack supports) and seismic/PV engineering
Suitable for building MEP seismic support systems, photovoltaic ground/roof mounting brackets, municipal pipe gallery supports, building roof purlins & wall beams, mechanical equipment frames, industrial storage racks and various construction fixed support structures.