Steel Section Catalog
ISMB 550
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 550 (México) · Doble T ISMB 550 (Argentina / LATAM) · UB 550 (UK / Australia)
The ISMB 550 steel profile weighs 104.0 kg/m (69.89 lb/ft), has a depth of 550 mm (21.65 in), flange width 190 mm (7.48 in). Cross-sectional area: 13,061.7 mm². Moment of inertia Ix = 64,144.92 cm⁴, Iy = 2,212.3 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 550 mm | 21.65 in |
| Width (b) | 190 mm | 7.48 in |
| Web thickness (tw) | 11.2 mm | 0.44 in |
| Flange thickness (tf) | 19.3 mm | 0.76 in |
| Fillet radius (r) | 18 mm | 0.71 in |
| Weight | 104.0 kg/m | 69.89 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 13,061.7 mm² | 20.246 in² |
| Moment of inertia (Ix) | 64,144.92 cm⁴ | 1541.08 in⁴ |
| Moment of inertia (Iy) | 2,212.3 cm⁴ | 53.15 in⁴ |
| Elastic section modulus (Sx) | 2,332.54 cm³ | 142.341 in³ |
| Elastic section modulus (Sy) | 232.87 cm³ | 14.211 in³ |
| Plastic section modulus (Zx) | 2,678.36 cm³ | 163.444 in³ |
| Plastic section modulus (Zy) | 364.4 cm³ | 22.237 in³ |
| Radius of gyration (rx) | 22.16 cm | 8.724 in |
| Radius of gyration (ry) | 4.12 cm | 1.622 in |
Beam Calculator— ISMB 550
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mfixed @ 0mfixed @ 6m→kN/m
Results — ISMB 550
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
0.13 mm
L/45614
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
