Steel Section Catalog
U 300x100x3.75
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 300x100x3.75 (UK / Australia)
The U 300x100x3.75 steel profile weighs 14.3 kg/m (9.61 lb/ft), has a depth of 300 mm (11.81 in), flange width 100 mm (3.94 in). Cross-sectional area: 1,832.8 mm². Moment of inertia Ix = 2,396.45 cm⁴, Iy = 157.2 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3.75 mm ≈ 9 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 300 mm | 11.81 in |
| Width (b) | 100 mm | 3.94 in |
| Thickness (t) | 3.8 mm | 0.15 in |
| Weight | 14.3 kg/m | 9.61 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,832.8 mm² | 2.841 in² |
| Moment of inertia (Ix) | 2,396.45 cm⁴ | 57.57 in⁴ |
| Moment of inertia (Iy) | 157.2 cm⁴ | 3.78 in⁴ |
| Elastic section modulus (Sx) | 159.76 cm³ | 9.749 in³ |
| Elastic section modulus (Sy) | 19.4 cm³ | 1.184 in³ |
| Plastic section modulus (Zx) | 183.73 cm³ | 11.212 in³ |
| Plastic section modulus (Zy) | 23.28 cm³ | 1.421 in³ |
| Radius of gyration (rx) | 11.43 cm | 4.500 in |
| Radius of gyration (ry) | 2.93 cm | 1.154 in |
Beam Calculator— U 300x100x3.75
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 300x100x3.75
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
3.52 mm
L/1704
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
