Steel Section Catalog
U 75x40x4.25
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 75x40x4.25 (UK / Australia)
The U 75x40x4.25 steel profile weighs 4.6 kg/m (3.12 lb/ft), has a depth of 75 mm (2.95 in), flange width 40 mm (1.57 in). Cross-sectional area: 604.6 mm². Moment of inertia Ix = 50.61 cm⁴, Iy = 8.11 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 4.25 mm ≈ 8 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 75 mm | 2.95 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 4.3 mm | 0.17 in |
| Weight | 4.6 kg/m | 3.12 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 604.6 mm² | 0.937 in² |
| Moment of inertia (Ix) | 50.61 cm⁴ | 1.22 in⁴ |
| Moment of inertia (Iy) | 8.11 cm⁴ | 0.19 in⁴ |
| Elastic section modulus (Sx) | 13.5 cm³ | 0.824 in³ |
| Elastic section modulus (Sy) | 2.62 cm³ | 0.160 in³ |
| Plastic section modulus (Zx) | 15.52 cm³ | 0.947 in³ |
| Plastic section modulus (Zy) | 3.14 cm³ | 0.192 in³ |
| Radius of gyration (rx) | 2.89 cm | 1.138 in |
| Radius of gyration (ry) | 1.16 cm | 0.457 in |
Beam Calculator— U 75x40x4.25
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 75x40x4.25
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
166.72 mm
L/36
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
