C4x7.25 is an American Standard steel channel (C shape) that is 4 in deep with a 1.72 in flange and weighs 7.25 lb/ft (10.8 kg/m). Its metric designation is C100x10.8. All values below come from the AISC Shapes Database v16.0.
C4x7.25 Channel Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 7.25 lb/ft | 10.8 kg/m |
| Cross-sectional area | A | 2.13 inยฒ | 1,370 mmยฒ |
| Depth | d | 4 in | 102 mm |
| Flange width | bf | 1.72 in | 43.7 mm |
| Web thickness | tw | 0.321 in | 8.15 mm |
| Average flange thickness | tf | 0.296 in | 7.52 mm |
| Distance to web toe of fillet (design) | kdes | 0.75 in | 19.1 mm |
| Distance to web toe of fillet (detailing) | kdet | 0.75 in | 19.1 mm |
| Distance between web toes of fillets | T | 2.5 in | 63.5 mm |
| Workable gage | WGi | 1 in | 25.4 mm |
| Centroid distance from back of web | xฬ | 0.459 in | 11.7 mm |
| Shear center distance from web centerline | eo | 0.386 in | 9.8 mm |
C4x7.25 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 4.58 inโด | 1.91 ร10โถ mmโด |
| Elastic section modulus, x-axis | Sx | 2.29 inยณ | 37.5 ร10ยณ mmยณ |
| Plastic section modulus, x-axis | Zx | 2.84 inยณ | 46.5 ร10ยณ mmยณ |
| Radius of gyration, x-axis | rx | 1.47 in | 37.3 mm |
| Moment of inertia, y-axis | Iy | 0.425 inโด | 0.177 ร10โถ mmโด |
| Elastic section modulus, y-axis | Sy | 0.337 inยณ | 5.52 ร10ยณ mmยณ |
| Plastic section modulus, y-axis | Zy | 0.695 inยณ | 11.4 ร10ยณ mmยณ |
| Radius of gyration, y-axis | ry | 0.447 in | 11.4 mm |
| Torsional constant | J | 0.0817 inโด | 34 ร10ยณ mmโด |
| Warping constant | Cw | 1.24 inโถ | 0.333 ร10โน mmโถ |
| Polar radius of gyration about shear center | rฬo | 1.75 in | 44.5 mm |
C4x7.25 Channel Weight Calculator
Enter a length to get the total weight of a C4x7.25 channel. A 20 ft length weighs 145 lb.
Uses the AISC nominal weight: 7.25 lb/ft (10.8 kg/m).
Channels Similar to C4x7.25
Other AISC channels with a nominal depth of 4 in:
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) | Web (in) |
|---|---|---|---|---|
| C4x6.25 | 6.25 | 4 | 1.65 | 0.247 |
| C4x5.4 | 5.4 | 4 | 1.58 | 0.184 |
| C4x4.5 | 4.5 | 4 | 1.52 | 0.125 |
| MC4x13.8 | 13.8 | 4 | 2.5 | 0.5 |
See every standard channel in the C-channel sizes chart, or the MC channel dimensions chart for miscellaneous channels.
C4x7.25 Channel FAQ
What does C4x7.25 mean?
C means American Standard channel. The first number (4) is the nominal depth in inches, and the second number (7.25) is the weight in pounds per foot. The actual depth of C4x7.25 is 4 in.
How much does a C4x7.25 channel weigh?
C4x7.25 weighs 7.25 lb per foot (10.8 kg per meter). A 20 ft length weighs about 145 lb.
What is the metric equivalent of C4x7.25?
The metric (SI) designation is C100x10.8: 102 mm deep with a 43.7 mm flange and 10.8 kg/m.
Where is the centroid of a C4x7.25 channel?
A channel is not symmetric about its vertical axis. The centroid of C4x7.25 sits 0.459 in (11.7 mm) from the back of the web, and the shear center is 0.386 in from the web centerline, on the side away from the flanges.
What size load can a C4x7.25 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.