Steel Section Catalog
UB 406x178x74
EN — Wide Flange (I-beam)
Wide flange beams (W shapes / I-beams) are the most common structural steel profile used in building construction. They are used for beams, columns, and girders in steel-framed buildings and bridges. Designed per AISC 360, Eurocode 3, and NBR 8800.
The UB 406x178x74 steel profile weighs 74.2 kg/m (49.86 lb/ft), has a depth of 412.8 mm (16.25 in), flange width 179.5 mm (7.07 in). Cross-sectional area: 9,361.6 mm². Moment of inertia Ix = 26,993.64 cm⁴, Iy = 1,545 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 412.8 mm | 16.25 in |
| Width (b) | 179.5 mm | 7.07 in |
| Web thickness (tw) | 9.5 mm | 0.37 in |
| Flange thickness (tf) | 16 mm | 0.63 in |
| Fillet radius (r) | 10.2 mm | 0.40 in |
| Weight | 74.2 kg/m | 49.86 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 9,361.6 mm² | 14.510 in² |
| Moment of inertia (Ix) | 26,993.64 cm⁴ | 648.52 in⁴ |
| Moment of inertia (Iy) | 1,545 cm⁴ | 37.12 in⁴ |
| Elastic section modulus (Sx) | 1,307.83 cm³ | 79.809 in³ |
| Elastic section modulus (Sy) | 172.14 cm³ | 10.505 in³ |
| Plastic section modulus (Zx) | 1,484.01 cm³ | 90.560 in³ |
| Plastic section modulus (Zy) | 266.35 cm³ | 16.254 in³ |
| Radius of gyration (rx) | 16.98 cm | 6.685 in |
| Radius of gyration (ry) | 4.06 cm | 1.598 in |
Beam Calculator— UB 406x178x74
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mfixed @ 0mfixed @ 6m→kN/m
Results — UB 406x178x74
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
0.31 mm
L/19195
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
