Steel Section Catalog
U 300x100x2.25
BR — Cold-formed Channel
Cold-formed channels (U shapes) are similar to C shapes but without stiffening lips. Used for light structural framing, supports, and secondary members.
Also known as: U 300x100x2.25 (UK / Australia)
The U 300x100x2.25 steel profile weighs 8.7 kg/m (5.83 lb/ft), has a depth of 300 mm (11.81 in), flange width 100 mm (3.94 in). Cross-sectional area: 1,109.8 mm². Moment of inertia Ix = 1,469.89 cm⁴, Iy = 98.48 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 2.25 mm ≈ 13 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 300 mm | 11.81 in |
| Width (b) | 100 mm | 3.94 in |
| Thickness (t) | 2.3 mm | 0.09 in |
| Weight | 8.7 kg/m | 5.83 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,109.8 mm² | 1.720 in² |
| Moment of inertia (Ix) | 1,469.89 cm⁴ | 35.31 in⁴ |
| Moment of inertia (Iy) | 98.48 cm⁴ | 2.37 in⁴ |
| Elastic section modulus (Sx) | 97.99 cm³ | 5.980 in³ |
| Elastic section modulus (Sy) | 12.21 cm³ | 0.745 in³ |
| Plastic section modulus (Zx) | 112.69 cm³ | 6.877 in³ |
| Plastic section modulus (Zy) | 14.66 cm³ | 0.895 in³ |
| Radius of gyration (rx) | 11.51 cm | 4.531 in |
| Radius of gyration (ry) | 2.98 cm | 1.173 in |
Beam Calculator— U 300x100x2.25
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 300x100x2.25
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
5.74 mm
L/1045
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
