Steel Section Catalog
ISMB 400
IS — 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.
Also known as: ISMB 400 (México) · Doble T ISMB 400 (Argentina / LATAM) · UB 400 (UK / Australia)
The ISMB 400 steel profile weighs 61.5 kg/m (41.33 lb/ft), has a depth of 400 mm (15.75 in), flange width 140 mm (5.51 in). Cross-sectional area: 7,755.2 mm². Moment of inertia Ix = 20,220.8 cm⁴, Iy = 733.9 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 400 mm | 15.75 in |
| Width (b) | 140 mm | 5.51 in |
| Web thickness (tw) | 8.9 mm | 0.35 in |
| Flange thickness (tf) | 16 mm | 0.63 in |
| Fillet radius (r) | 14 mm | 0.55 in |
| Weight | 61.5 kg/m | 41.33 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 7,755.2 mm² | 12.021 in² |
| Moment of inertia (Ix) | 20,220.8 cm⁴ | 485.80 in⁴ |
| Moment of inertia (Iy) | 733.9 cm⁴ | 17.63 in⁴ |
| Elastic section modulus (Sx) | 1,011.04 cm³ | 61.698 in³ |
| Elastic section modulus (Sy) | 104.84 cm³ | 6.398 in³ |
| Plastic section modulus (Zx) | 1,161.48 cm³ | 70.878 in³ |
| Plastic section modulus (Zy) | 164.09 cm³ | 10.013 in³ |
| Radius of gyration (rx) | 16.15 cm | 6.358 in |
| Radius of gyration (ry) | 3.08 cm | 1.213 in |
Beam Calculator— ISMB 400
3D preview unavailable
Your device does not support WebGL. The 2D diagram below is still fully functional.
mfixed @ 0mfixed @ 6m→kN/m
Results — ISMB 400
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
0.42 mm
L/14379
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
