Steel Section Catalog
U 100x50x3.75
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 100x50x3.75 (UK / Australia)
The U 100x50x3.75 steel profile weighs 5.5 kg/m (3.68 lb/ft), has a depth of 100 mm (3.94 in), flange width 50 mm (1.97 in). Cross-sectional area: 707.8 mm². Moment of inertia Ix = 108.24 cm⁴, Iy = 15.68 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3.75 mm ≈ 9 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 50 mm | 1.97 in |
| Thickness (t) | 3.8 mm | 0.15 in |
| Weight | 5.5 kg/m | 3.68 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 707.8 mm² | 1.097 in² |
| Moment of inertia (Ix) | 108.24 cm⁴ | 2.60 in⁴ |
| Moment of inertia (Iy) | 15.68 cm⁴ | 0.38 in⁴ |
| Elastic section modulus (Sx) | 21.65 cm³ | 1.321 in³ |
| Elastic section modulus (Sy) | 4.06 cm³ | 0.248 in³ |
| Plastic section modulus (Zx) | 24.9 cm³ | 1.519 in³ |
| Plastic section modulus (Zy) | 4.87 cm³ | 0.297 in³ |
| Radius of gyration (rx) | 3.91 cm | 1.539 in |
| Radius of gyration (ry) | 1.49 cm | 0.587 in |
Beam Calculator— U 100x50x3.75
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 100x50x3.75
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
77.95 mm
L/77
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
