Steel C Channel Sizes Chart (C3–C15) – Dimensions & Weight per Foot

Looking for a steel c channel sizes chart with dimensions and weight? This guide provides standard c channel sizes, detailed c channel dimensions, and c channel weight per foot (lb/ft), including C3 to C15 sections with metric conversions (kg/m) for structural and engineering applications.

Common Steel C Channel Sizes Chart (Quick Reference)

The following steel c channel sizes chart includes standard c channel dimensions, depth, and c channel weight per foot (lb/ft), making it easy to compare channel sizes for structural applications.

Channel Size	Depth (in)	Weight (lb/ft)
C3 × 4.1	3	4.1
C4 × 5.4	4	5.4
C6 × 8.2	6	8.2
C8 × 11.5	8	11.5
C10 × 15.3	10	15.3
C12 × 20.7	12	20.7

These are some of the most commonly used c channel sizes in structural fabrication, support frames, and machinery bases.

Steel C channels are widely used in construction, machinery, and structural steel projects due to their efficient strength-to-weight performance and ease of fabrication. In structural design, C channel sizes follow the AISC designation system, where the section name indicates depth and weight per foot (lb/ft). This makes it easier for engineers and buyers to quickly identify standard sections.

Standard steel C channel sizes typically range from:

• Depth: 3 in to 15 in
• Flange width: 1.4 in to 3.4 in
• Weight: 4.1 lb/ft to 33.9 lb/ft

These standard C channel sizes are widely used in structural frames, equipment supports, trailers, and steel building components.

Full Steel C Channel Dimensions Chart (AISC)

This steel c channel dimensions chart provides full section data including flange width, web thickness, and c channel weight (lb/ft and kg/m), based on AISC structural standards.

Designation	in				mm
	Depth (in)	Flange Width (in)	Web Thickness (in)	Weight (lb/ft)	Depth (mm)	Flange Width (mm)	Web Thickness (mm)	Weight (kg/m)
C3 × 4.1	3	1.41	0.17	4.1	76.2	35.8	4.3	6.1
C4 × 5.4	4	1.58	0.18	5.4	101.6	40.1	4.6	8
C5 × 6.7	5	1.75	0.19	6.7	127	44.5	4.8	10
C6 × 8.2	6	1.92	0.2	8.2	152.4	48.8	5.1	12.2
C7 × 9.8	7	2.09	0.21	9.8	177.8	53.1	5.3	14.6
C8 × 11.5	8	2.26	0.22	11.5	203.2	57.4	5.6	17.1
C9 × 13.4	9	2.43	0.23	13.4	228.6	61.7	5.8	19.9
C10 × 15.3	10	2.6	0.24	15.3	254	66	6.1	22.8
C12 × 20.7	12	2.94	0.28	20.7	304.8	74.7	7.1	30.8
C15 × 33.9	15	3.4	0.4	33.9	381	86.4	10.2	50.4

C Channel Sizes in Metric (mm and kg/m)

While standard C channel sizes are typically defined in inches, many international projects require c channel sizes in metric units (mm and kg/m).

The table above already includes both imperial (inch, lb/ft) and metric (mm, kg/m) units, allowing direct comparison between measurement systems. This makes it easier for global buyers and engineers to use the same steel C channel sizes chart across different measurement systems.

Structural Properties

The following data includes key engineering parameters used in structural calculations

Designation	Area (in²)	Ix (in⁴)	Sx (in³)
C3 × 4.1	1.21	1.77	1.18
C4 × 5.4	1.59	4.47	2.23
C5 × 6.7	1.97	8.72	3.49
C6 × 8.2	2.41	15.4	5.14
C7 × 9.8	2.88	25.1	7.18
C8 × 11.5	3.38	38.5	9.62
C9 × 13.4	3.94	56.5	12.6
C10 × 15.3	4.49	79.1	15.8
C12 × 20.7	6.08	147	24.5
C15 × 33.9	9.97	370	49.3

Explanation of engineering parameters:

• Area (A) – cross-sectional area of the channel
• Ix – moment of inertia about the strong axis
• Sx – section modulus used in bending calculations

These values are commonly referenced in structural design and load calculations.

Steel C Channel Dimensions Explained

Understanding c channel dimensions helps ensure proper selection in structural design:

• Depth (d) – The vertical dimension of the C channel, directly affecting bending strength
• Flange Width (bf) – Determines connection area and stability in structural frames
• Web Thickness (tw) – Influences shear strength and overall stiffness

The c channel weight per foot is also a key parameter used to estimate total material quantity in fabrication and construction projects.

For example:

• C6 × 8.2
  • Depth: 6 in
  • Weight: 8.2 lb/ft
• C12 × 20.7
  • Depth: 12 in
  • Weight: 20.7 lb/ft

Most Common Steel C Channel Sizes and Applications

Different standard c channel sizes are used depending on load and application requirements

1. Small Channels (C3–C5)

• Light framing
• Equipment brackets
• Machinery bases
• Small support frames

2. Medium Channels (C6–C8)

• Structural frames
• Roof supports
• Trailer frames
• Equipment structures

3. Large Channels (C10–C15)

• Building frameworks
• Industrial platforms
• Heavy machinery supports
• Structural reinforcement

These common c channel sizes cover most structural and fabrication applications.

How to Choose the Right Steel C Channel Size

Selecting the correct C channel size depends on several practical factors.

• Load requirements – Higher loads require heavier sections
• Span length – Longer spans need deeper channels
• Structural role – Support beams, frames, or reinforcements

Using accurate c channel weight per foot helps estimate material quantities and project costs.

Need custom C channel sizes or bulk supply? Contact us for mill prices and international shipping.

Steel C Channel Size FAQ

• What are standard steel C channel sizes?
  Standard steel c channel sizes typically range from C3 to C15, corresponding to depths from 3 inches to 15 inches.
• How do you read C channel sizes like C8 × 11.5?
  A designation such as C8 × 11.5 means the channel has an approximate depth of 8 inches and a weight of 11.5 lb/ft.
• What is the weight of C channel per foot?
  The c channel weight per foot ranges from about 4.1 lb/ft (C3) to 33.9 lb/ft (C15), depending on size.
• What are C channel dimensions in inches?
  In the U.S., c channel dimensions in inches include depth, flange width, and web thickness, with weight measured in lb/ft.
• What are C channel sizes in metric units?
  C channel sizes metric are expressed in millimeters (mm) and kilograms per meter (kg/m), commonly used in international projects.