Steel Section Catalog
ISMB 125
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 125 (México) · Doble T ISMB 125 (Argentina / LATAM) · UB 125 (UK / Australia)
The ISMB 125 steel profile weighs 13.3 kg/m (8.94 lb/ft), has a depth of 125 mm (4.92 in), flange width 70 mm (2.76 in). Cross-sectional area: 1,665 mm². Moment of inertia Ix = 437.85 cm⁴, Iy = 45.85 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 125 mm | 4.92 in |
| Width (b) | 70 mm | 2.76 in |
| Web thickness (tw) | 5 mm | 0.20 in |
| Flange thickness (tf) | 8 mm | 0.31 in |
| Fillet radius (r) | 9 mm | 0.35 in |
| Weight | 13.3 kg/m | 8.94 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 1,665 mm² | 2.581 in² |
| Moment of inertia (Ix) | 437.85 cm⁴ | 10.52 in⁴ |
| Moment of inertia (Iy) | 45.85 cm⁴ | 1.10 in⁴ |
| Elastic section modulus (Sx) | 70.06 cm³ | 4.275 in³ |
| Elastic section modulus (Sy) | 13.1 cm³ | 0.799 in³ |
| Plastic section modulus (Zx) | 80.37 cm³ | 4.904 in³ |
| Plastic section modulus (Zy) | 20.28 cm³ | 1.238 in³ |
| Radius of gyration (rx) | 5.13 cm | 2.020 in |
| Radius of gyration (ry) | 1.66 cm | 0.654 in |
Beam Calculator— ISMB 125
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mfixed @ 0mfixed @ 6m→kN/m
Results — ISMB 125
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
19.27 mm
L/311
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
