Steel Section Catalog
U 100x40x3.05
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.
The U 100x40x3.05 steel profile weighs 5.7 kg/m (3.86 lb/ft), has a depth of 100 mm (3.94 in), flange width 40 mm (1.57 in). Cross-sectional area: 521.1 mm². Moment of inertia Ix = 76.14 cm⁴, Iy = 6.95 cm⁴.
Cross-section (not to scale)
Gauge equivalent: 3.05 mm ≈ 11 gauge (Manufacturers Standard Gage)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 100 mm | 3.94 in |
| Width (b) | 40 mm | 1.57 in |
| Thickness (t) | 3.0 mm | 0.12 in |
| Weight | 5.7 kg/m | 3.86 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 521.1 mm² | 0.808 in² |
| Moment of inertia (Ix) | 76.14 cm⁴ | 1.83 in⁴ |
| Moment of inertia (Iy) | 6.95 cm⁴ | 0.17 in⁴ |
| Elastic section modulus (Sx) | 15.23 cm³ | 0.929 in³ |
| Elastic section modulus (Sy) | 2.17 cm³ | 0.132 in³ |
| Plastic section modulus (Zx) | 17.51 cm³ | 1.069 in³ |
| Plastic section modulus (Zy) | 2.61 cm³ | 0.159 in³ |
| Radius of gyration (rx) | 3.82 cm | 1.504 in |
| Radius of gyration (ry) | 1.16 cm | 0.457 in |
Beam Calculator— U 100x40x3.05
3D preview unavailable
Your device does not support WebGL. The 2D diagram below is still fully functional.
mfixed @ 0mfixed @ 6m→kN/m
Results — U 100x40x3.05
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
110.82 mm
L/54
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
