Steel Section Catalog
U 75x40x3.05
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 75x40x3.05 (UK / Australia)
The U 75x40x3.05 steel profile weighs 3.4 kg/m (2.31 lb/ft), has a depth of 75 mm (2.95 in), flange width 40 mm (1.57 in). Cross-sectional area: 444.8 mm². Moment of inertia Ix = 38.66 cm⁴, Iy = 6.38 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3.05 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 75 mm | 2.95 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 3.0 mm | 0.12 in |
| Weight | 3.4 kg/m | 2.31 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 444.8 mm² | 0.689 in² |
| Moment of inertia (Ix) | 38.66 cm⁴ | 0.93 in⁴ |
| Moment of inertia (Iy) | 6.38 cm⁴ | 0.15 in⁴ |
| Elastic section modulus (Sx) | 10.31 cm³ | 0.629 in³ |
| Elastic section modulus (Sy) | 2.08 cm³ | 0.127 in³ |
| Plastic section modulus (Zx) | 11.85 cm³ | 0.723 in³ |
| Plastic section modulus (Zy) | 2.5 cm³ | 0.153 in³ |
| Radius of gyration (rx) | 2.95 cm | 1.161 in |
| Radius of gyration (ry) | 1.2 cm | 0.472 in |
Beam Calculator— U 75x40x3.05
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 75x40x3.05
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
218.25 mm
L/27
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
