C3x4.1 is an American Standard steel channel (C shape) that is 3 in deep with a 1.41 in flange and weighs 4.1 lb/ft (6.1 kg/m). Its metric designation is C75x6.1. All values below come from the AISC Shapes Database v16.0.
C3x4.1 Channel Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 4.1 lb/ft | 6.1 kg/m |
| Cross-sectional area | A | 1.2 inยฒ | 774 mmยฒ |
| Depth | d | 3 in | 76.2 mm |
| Flange width | bf | 1.41 in | 35.8 mm |
| Web thickness | tw | 0.17 in | 4.32 mm |
| Average flange thickness | tf | 0.273 in | 6.93 mm |
| Distance to web toe of fillet (design) | kdes | 0.688 in | 17.5 mm |
| Distance to web toe of fillet (detailing) | kdet | 0.6875 in | 17.5 mm |
| Distance between web toes of fillets | T | 1.625 in | 41.3 mm |
| Workable gage | WGi | Not listed | Not listed |
| Centroid distance from back of web | xฬ | 0.437 in | 11.1 mm |
| Shear center distance from web centerline | eo | 0.461 in | 11.7 mm |
C3x4.1 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 1.65 inโด | 0.687 ร10โถ mmโด |
| Elastic section modulus, x-axis | Sx | 1.1 inยณ | 18 ร10ยณ mmยณ |
| Plastic section modulus, x-axis | Zx | 1.32 inยณ | 21.6 ร10ยณ mmยณ |
| Radius of gyration, x-axis | rx | 1.18 in | 30 mm |
| Moment of inertia, y-axis | Iy | 0.191 inโด | 0.0795 ร10โถ mmโด |
| Elastic section modulus, y-axis | Sy | 0.196 inยณ | 3.21 ร10ยณ mmยณ |
| Plastic section modulus, y-axis | Zy | 0.399 inยณ | 6.54 ร10ยณ mmยณ |
| Radius of gyration, y-axis | ry | 0.398 in | 10.1 mm |
| Torsional constant | J | 0.0269 inโด | 11.2 ร10ยณ mmโด |
| Warping constant | Cw | 0.307 inโถ | 0.0824 ร10โน mmโถ |
| Polar radius of gyration about shear center | rฬo | 1.53 in | 38.9 mm |
C3x4.1 Channel Weight Calculator
Enter a length to get the total weight of a C3x4.1 channel. A 20 ft length weighs 82 lb.
Uses the AISC nominal weight: 4.1 lb/ft (6.1 kg/m).
Channels Similar to C3x4.1
Other AISC channels with a nominal depth of 3 in:
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) | Web (in) |
|---|---|---|---|---|
| C3x3.5 | 3.5 | 3 | 1.37 | 0.132 |
| C3x5 | 5 | 3 | 1.5 | 0.258 |
| C3x6 | 6 | 3 | 1.6 | 0.356 |
| MC3x7.1 | 7.1 | 3 | 1.94 | 0.312 |
See every standard channel in the C-channel sizes chart, or the MC channel dimensions chart for miscellaneous channels.
C3x4.1 Channel FAQ
What does C3x4.1 mean?
C means American Standard channel. The first number (3) is the nominal depth in inches, and the second number (4.1) is the weight in pounds per foot. The actual depth of C3x4.1 is 3 in.
How much does a C3x4.1 channel weigh?
C3x4.1 weighs 4.1 lb per foot (6.1 kg per meter). A 20 ft length weighs about 82 lb.
What is the metric equivalent of C3x4.1?
The metric (SI) designation is C75x6.1: 76.2 mm deep with a 35.8 mm flange and 6.1 kg/m.
Where is the centroid of a C3x4.1 channel?
A channel is not symmetric about its vertical axis. The centroid of C3x4.1 sits 0.437 in (11.1 mm) from the back of the web, and the shear center is 0.461 in from the web centerline, on the side away from the flanges.
What size load can a C3x4.1 channel carry?
Capacity depends on the span, load, bracing, connections and local building code, so it cannot be read from a size table. A licensed structural engineer must size any channel that carries a load.
Source: AISC Shapes Database v16.0, consistent with the AISC Steel Construction Manual, 16th Edition. Last updated: September 2026.
This page is reference information only and is not engineering advice. Do not use it for a specific design without verification by a licensed engineer or architect. Full disclaimer.