Steel Section Catalog
U 100x40x2.25
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.
The U 100x40x2.25 steel profile weighs 4.2 kg/m (2.85 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 389.8 mm². Moment of inertia Ix = 58.1 cm⁴, Iy = 5.44 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 2.25 mm ≈ 13 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 2.3 mm | 0.09 in |
| Weight | 4.2 kg/m | 2.85 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 389.8 mm² | 0.604 in² |
| Moment of inertia (Ix) | 58.1 cm⁴ | 1.40 in⁴ |
| Moment of inertia (Iy) | 5.44 cm⁴ | 0.13 in⁴ |
| Elastic section modulus (Sx) | 11.62 cm³ | 0.709 in³ |
| Elastic section modulus (Sy) | 1.71 cm³ | 0.104 in³ |
| Plastic section modulus (Zx) | 13.36 cm³ | 0.815 in³ |
| Plastic section modulus (Zy) | 2.05 cm³ | 0.125 in³ |
| Radius of gyration (rx) | 3.86 cm | 1.520 in |
| Radius of gyration (ry) | 1.18 cm | 0.465 in |
Beam Calculator— U 100x40x2.25
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mfixed @ 0mfixed @ 6m→kN/m
Results — U 100x40x2.25
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
145.22 mm
L/41
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
