Steel Section Catalog
ISMB 300
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 300 (México) · Doble T ISMB 300 (Argentina / LATAM) · UB 300 (UK / Australia)
The ISMB 300 steel profile weighs 46.0 kg/m (30.91 lb/ft), has a depth of 300 mm (11.81 in), flange width 140 mm (5.51 in). Cross-sectional area: 5,776.3 mm². Moment of inertia Ix = 8,870.29 cm⁴, Iy = 600.15 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 300 mm | 11.81 in |
| Width (b) | 140 mm | 5.51 in |
| Web thickness (tw) | 7.7 mm | 0.30 in |
| Flange thickness (tf) | 13.1 mm | 0.52 in |
| Fillet radius (r) | 14 mm | 0.55 in |
| Weight | 46.0 kg/m | 30.91 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 5,776.3 mm² | 8.953 in² |
| Moment of inertia (Ix) | 8,870.29 cm⁴ | 213.11 in⁴ |
| Moment of inertia (Iy) | 600.15 cm⁴ | 14.42 in⁴ |
| Elastic section modulus (Sx) | 591.35 cm³ | 36.087 in³ |
| Elastic section modulus (Sy) | 85.74 cm³ | 5.232 in³ |
| Plastic section modulus (Zx) | 670.48 cm³ | 40.915 in³ |
| Plastic section modulus (Zy) | 132.44 cm³ | 8.082 in³ |
| Radius of gyration (rx) | 12.39 cm | 4.878 in |
| Radius of gyration (ry) | 3.22 cm | 1.268 in |
Beam Calculator— ISMB 300
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mfixed @ 0mfixed @ 6m→kN/m
Results — ISMB 300
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
0.95 mm
L/6308
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
