C4x4.5 is an American Standard steel channel (C shape) that is 4 in deep with a 1.52 in flange and weighs 4.5 lb/ft (6.7 kg/m). Its metric designation is C100x6.7. All values below come from the AISC Shapes Database v16.0.
C4x4.5 Channel Dimensions
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Nominal weight | W | 4.5 lb/ft | 6.7 kg/m |
| Cross-sectional area | A | 1.34 inยฒ | 865 mmยฒ |
| Depth | d | 4 in | 102 mm |
| Flange width | bf | 1.52 in | 38.6 mm |
| Web thickness | tw | 0.125 in | 3.18 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 | Not listed | Not listed |
| Centroid distance from back of web | xฬ | 0.473 in | 12 mm |
| Shear center distance from web centerline | eo | 0.556 in | 14.1 mm |
C4x4.5 Section Properties
| Property | Symbol | Imperial | Metric |
|---|---|---|---|
| Moment of inertia, x-axis | Ix | 3.53 inโด | 1.47 ร10โถ mmโด |
| Elastic section modulus, x-axis | Sx | 1.77 inยณ | 29 ร10ยณ mmยณ |
| Plastic section modulus, x-axis | Zx | 2.05 inยณ | 33.6 ร10ยณ mmยณ |
| Radius of gyration, x-axis | rx | 1.62 in | 41.1 mm |
| Moment of inertia, y-axis | Iy | 0.265 inโด | 0.11 ร10โถ mmโด |
| Elastic section modulus, y-axis | Sy | 0.253 inยณ | 4.15 ร10ยณ mmยณ |
| Plastic section modulus, y-axis | Zy | 0.495 inยณ | 8.11 ร10ยณ mmยณ |
| Radius of gyration, y-axis | ry | 0.445 in | 11.3 mm |
| Torsional constant | J | 0.0306 inโด | 12.7 ร10ยณ mmโด |
| Warping constant | Cw | 0.778 inโถ | 0.209 ร10โน mmโถ |
| Polar radius of gyration about shear center | rฬo | 1.97 in | 50 mm |
C4x4.5 Channel Weight Calculator
Enter a length to get the total weight of a C4x4.5 channel. A 20 ft length weighs 90 lb.
Uses the AISC nominal weight: 4.5 lb/ft (6.7 kg/m).
Channels Similar to C4x4.5
Other AISC channels with a nominal depth of 4 in:
| Shape | Weight (lb/ft) | Depth (in) | Flange width (in) | Web (in) |
|---|---|---|---|---|
| C4x5.4 | 5.4 | 4 | 1.58 | 0.184 |
| C4x6.25 | 6.25 | 4 | 1.65 | 0.247 |
| C4x7.25 | 7.25 | 4 | 1.72 | 0.321 |
| 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.
C4x4.5 Channel FAQ
What does C4x4.5 mean?
C means American Standard channel. The first number (4) is the nominal depth in inches, and the second number (4.5) is the weight in pounds per foot. The actual depth of C4x4.5 is 4 in.
How much does a C4x4.5 channel weigh?
C4x4.5 weighs 4.5 lb per foot (6.7 kg per meter). A 20 ft length weighs about 90 lb.
What is the metric equivalent of C4x4.5?
The metric (SI) designation is C100x6.7: 102 mm deep with a 38.6 mm flange and 6.7 kg/m.
Where is the centroid of a C4x4.5 channel?
A channel is not symmetric about its vertical axis. The centroid of C4x4.5 sits 0.473 in (12 mm) from the back of the web, and the shear center is 0.556 in from the web centerline, on the side away from the flanges.
What size load can a C4x4.5 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.