Steel Section Catalog
U 75x40x3.75
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 75x40x3.75 (UK / Australia)
The U 75x40x3.75 steel profile weighs 4.2 kg/m (2.79 lb/ft), has a depth of 75 mm (2.95 in), flange width 40 mm (1.57 in). Cross-sectional area: 539.1 mm². Moment of inertia Ix = 45.84 cm⁴, Iy = 7.44 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3.75 mm ≈ 9 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 75 mm | 2.95 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 3.8 mm | 0.15 in |
| Weight | 4.2 kg/m | 2.79 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 539.1 mm² | 0.836 in² |
| Moment of inertia (Ix) | 45.84 cm⁴ | 1.10 in⁴ |
| Moment of inertia (Iy) | 7.44 cm⁴ | 0.18 in⁴ |
| Elastic section modulus (Sx) | 12.22 cm³ | 0.746 in³ |
| Elastic section modulus (Sy) | 2.41 cm³ | 0.147 in³ |
| Plastic section modulus (Zx) | 14.06 cm³ | 0.858 in³ |
| Plastic section modulus (Zy) | 2.89 cm³ | 0.176 in³ |
| Radius of gyration (rx) | 2.92 cm | 1.150 in |
| Radius of gyration (ry) | 1.17 cm | 0.461 in |
Beam Calculator— U 75x40x3.75
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 75x40x3.75
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
184.06 mm
L/33
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
