When it comes to structural steel, C channels are a versatile and widely used component in construction, manufacturing, and industrial applications. These channels, named for their distinctive "C" shape, provide excellent strength while maintaining a relatively lightweight profile. In the United States, C channel dimensions follow the American Standard (ASTM), ensuring uniformity and compatibility across various projects.
Understanding American standard steel C channel sizes is essential for selecting the right material for your application, whether you're designing a building framework, constructing support beams, or fabricating industrial equipment. In this guide, we'll explore the standard dimensions to help you make informed decisions for your project.
Union Steel Industry Co., Ltd is professional structural steel manufacturer, for more details, please contact:sales@union-steels.com
|
American Standard Steel C Channel Sizes
|
|
Desig-
nation
|
Area,
A, in2
|
Depth,
d, in
|
Weight
lb/ft
|
Flange
|
Web
Thickness
tw, in
|
Axis X-X
|
Axis Y-Y
|
x,
in
|
|
Width,
bf, in
|
Thickness,
tf, in
|
I,
in4
|
S,
in3
|
r,
in
|
I,
in4
|
S,
in3
|
r,
in
|
|
C15 x 50
|
14.7
|
15.00
|
50
|
3.716
|
0.650
|
0.716
|
404
|
53.8
|
5.24
|
11.0
|
3.78
|
0.867
|
0.798
|
|
C15 x 40
|
11.8
|
15.00
|
40
|
3.520
|
0.650
|
0.520
|
349
|
46.5
|
5.44
|
9.23
|
3.37
|
0.886
|
0.777
|
|
C15 x 33.9
|
9.96
|
15.00
|
33.9
|
3.400
|
0.650
|
0.400
|
315
|
42.0
|
5.62
|
8.13
|
3.11
|
0.904
|
0.787
|
|
C12 x 30
|
8.82
|
12.00
|
30
|
3.170
|
0.501
|
0.510
|
162
|
27.0
|
4.29
|
5.14
|
2.06
|
0.763
|
0.674
|
|
C12 x 25
|
7.35
|
12.00
|
25
|
3.047
|
0.501
|
0.387
|
144
|
24.1
|
4.43
|
4.47
|
1.88
|
0.780
|
0.674
|
|
C12 x 20.7
|
6.09
|
12.00
|
20.7
|
2.942
|
0.501
|
0.282
|
129
|
21.5
|
4.61
|
3.88
|
1.73
|
0.799
|
0.698
|
|
C10 x 30
|
8.82
|
10.00
|
30
|
3.033
|
0.436
|
0.673
|
103
|
20.7
|
3.42
|
3.94
|
1.65
|
0.669
|
0.649
|
|
C10 x 25
|
7.35
|
10.00
|
25
|
2.886
|
0.436
|
0.526
|
91.2
|
18.2
|
3.52
|
3.36
|
1.48
|
0.676
|
0.617
|
|
C10 x 20
|
5.88
|
10.00
|
20
|
2.739
|
0.436
|
0.379
|
78.9
|
15.8
|
3.66
|
2.81
|
1.32
|
0.692
|
0.606
|
|
C10 x 15.3
|
4.49
|
10.00
|
15.3
|
2.600
|
0.436
|
0.240
|
67.4
|
13.5
|
3.87
|
2.28
|
1.16
|
0.713
|
0.634
|
|
C9 x 20
|
5.88
|
9.00
|
20
|
2.648
|
0.413
|
0.448
|
60.9
|
13.5
|
3.22
|
2.42
|
1.17
|
0.642
|
0.583
|
|
C9 x 15
|
4.41
|
9.00
|
15
|
2.485
|
0.413
|
0.285
|
51.0
|
11.3
|
3.40
|
1.93
|
1.01
|
0.661
|
0.586
|
|
C9 x 13.4
|
3.94
|
9.00
|
13.4
|
2.433
|
0.413
|
0.233
|
47.9
|
10.6
|
3.48
|
1.76
|
0.962
|
0.669
|
0.601
|
|
Desig-
nation
|
Area,
A, in2
|
Depth,
d, in
|
Weight
lb/ft
|
Flange
|
Web
Thickness
tw, in
|
Axis X-X
|
Axis Y-Y
|
x,
in
|
|
Width,
bf, in
|
Thickness,
tf, in
|
I,
in4
|
S,
in3
|
r,
in
|
I,
in4
|
S,
in3
|
r,
in
|
|
C8 x 18.75
|
5.51
|
8.00
|
18.75
|
2.527
|
0.390
|
0.487
|
44.0
|
11.0
|
2.82
|
1.98
|
1.01
|
0.599
|
0.565
|
|
C8 x 13.75
|
4.04
|
8.00
|
13.75
|
2.343
|
0.390
|
0.303
|
36.1
|
9.03
|
2.99
|
1.53
|
0.854
|
0.615
|
0.553
|
|
C8 x 11.5
|
3.38
|
8.00
|
11.5
|
2.260
|
0.390
|
0.220
|
32.6
|
8.14
|
3.11
|
1.32
|
0.781
|
0.625
|
0.571
|
|
C7 x 14.75
|
4.33
|
7.00
|
14.75
|
2.299
|
0.366
|
0.419
|
27.2
|
7.78
|
2.51
|
1.38
|
0.779
|
0.564
|
0.532
|
|
C7 x 12.25
|
3.60
|
7.00
|
12.25
|
2.194
|
0.366
|
0.314
|
24.2
|
6.93
|
2.60
|
1.17
|
0.703
|
0.571
|
0.525
|
|
C7 x 9.8
|
2.87
|
7.00
|
9.8
|
2.090
|
0.366
|
0.210
|
21.3
|
6.08
|
2.72
|
0.968
|
0.625
|
0.581
|
0.540
|
|
C6 x 13
|
3.83
|
6.00
|
13
|
2.157
|
0.343
|
0.437
|
17.4
|
5.80
|
2.13
|
1.05
|
0.642
|
0.525
|
0.514
|
|
C6 x 10.5
|
3.09
|
6.00
|
10.5
|
2.034
|
0.343
|
0.314
|
15.2
|
5.06
|
2.22
|
0.866
|
0.564
|
0.529
|
0.499
|
|
C6 x 8.2
|
2.40
|
6.00
|
8.2
|
1.920
|
0.343
|
0.200
|
13.1
|
4.38
|
2.34
|
0.693
|
0.492
|
0.537
|
0.511
|
|
C5 x 9
|
2.64
|
5.00
|
9
|
1.885
|
0.320
|
0.325
|
8.90
|
3.56
|
1.83
|
0.632
|
0.450
|
0.489
|
0.478
|
|
C5 x 6.7
|
1.97
|
5.00
|
6.7
|
1.750
|
0.320
|
0.190
|
7.49
|
3.00
|
1.95
|
0.479
|
0.378
|
0.493
|
0.484
|
|
C4 x 7.25
|
2.13
|
4.00
|
7.25
|
1.721
|
0.296
|
0.321
|
4.59
|
2.29
|
1.47
|
0.433
|
0.343
|
0.450
|
0.459
|
|
C4 x 5.4
|
1.59
|
4.00
|
5.4
|
1.584
|
0.296
|
0.184
|
3.85
|
1.93
|
1.56
|
0.319
|
0.283
|
0.449
|
0.457
|
|
C3 x 6
|
1.76
|
3.00
|
6
|
1.596
|
0.273
|
0.356
|
2.07
|
1.38
|
1.08
|
0.305
|
0.268
|
0.416
|
0.455
|
|
C3 x 5
|
1.47
|
3.00
|
5
|
1.498
|
0.273
|
0.258
|
1.85
|
1.24
|
1.12
|
0.247
|
0.233
|
0.410
|
0.438
|
|
C3 x 4.1
|
1.21
|
3.00
|
4.1
|
1.410
|
0.273
|
0.170
|
1.66
|
1.10
|
1.17
|
0.197
|
0.202
|
0.404
|
0.436
|
Symbols: I = moment of inertia; S = section modulus; r = radius of gyration; x = distance from center of gravity of section to outer face of structural shape.
English
Español
Tel : +86-18565811709
Email : 
News
