Steel Section Catalog
ISLB 550 — Dimensions & Section Properties
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: ISLB 550 (México) · Doble T ISLB 550 (Argentina / LATAM) · UB 550 (UK / Australia)
The ISLB 550 steel profile weighs 86.3 kg/m (57.99 lb/ft), has a depth of 550 mm (21.65 in), flange width 190 mm (7.48 in). Cross-sectional area: 10,848 mm². Moment of inertia Ix = 52,397.91 cm⁴, Iy = 1,718.95 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) | 9.9 mm | 0.39 in |
| Flange thickness (tf) | 15 mm | 0.59 in |
| Fillet radius (r) | 18 mm | 0.71 in |
| Weight | 86.3 kg/m | 57.99 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 10,848 mm² | 16.814 in² |
| Moment of inertia (Ix) | 52,397.91 cm⁴ | 1258.86 in⁴ |
| Moment of inertia (Iy) | 1,718.95 cm⁴ | 41.30 in⁴ |
| Elastic section modulus (Sx) | 1,905.38 cm³ | 116.274 in³ |
| Elastic section modulus (Sy) | 180.94 cm³ | 11.042 in³ |
| Plastic section modulus (Zx) | 2,193.99 cm³ | 133.886 in³ |
| Plastic section modulus (Zy) | 283.49 cm³ | 17.300 in³ |
| Radius of gyration (rx) | 21.98 cm | 8.654 in |
| Radius of gyration (ry) | 3.98 cm | 1.567 in |
Beam Calculator— ISLB 550
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mfixed @ 0mfixed @ 6m→kN/m
Results — ISLB 550
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
0.16 mm
L/37261
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
