Steel Section Catalog
ISLB 400 — 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 400 (México) · Doble T ISLB 400 (Argentina / LATAM) · UB 400 (UK / Australia)
The ISLB 400 steel profile weighs 56.9 kg/m (38.24 lb/ft), has a depth of 400 mm (15.75 in), flange width 165 mm (6.50 in). Cross-sectional area: 7,125 mm². Moment of inertia Ix = 19,005.86 cm⁴, Iy = 937.46 cm⁴.
Cross-section (not to scale)
Dimensions
| Property | Metric | Imperial |
|---|---|---|
| Depth (h) | 400 mm | 15.75 in |
| Width (b) | 165 mm | 6.50 in |
| Web thickness (tw) | 8 mm | 0.31 in |
| Flange thickness (tf) | 12.5 mm | 0.49 in |
| Fillet radius (r) | 16 mm | 0.63 in |
| Weight | 56.9 kg/m | 38.24 lb/ft |
Section Properties
| Property | Metric | Imperial |
|---|---|---|
| Area (A) | 7,125 mm² | 11.044 in² |
| Moment of inertia (Ix) | 19,005.86 cm⁴ | 456.62 in⁴ |
| Moment of inertia (Iy) | 937.46 cm⁴ | 22.52 in⁴ |
| Elastic section modulus (Sx) | 950.29 cm³ | 57.990 in³ |
| Elastic section modulus (Sy) | 113.63 cm³ | 6.934 in³ |
| Plastic section modulus (Zx) | 1,080.47 cm³ | 65.935 in³ |
| Plastic section modulus (Zy) | 176.16 cm³ | 10.750 in³ |
| Radius of gyration (rx) | 16.33 cm | 6.429 in |
| Radius of gyration (ry) | 3.63 cm | 1.429 in |
Beam Calculator— ISLB 400
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mfixed @ 0mfixed @ 6m→kN/m
Results — ISLB 400
Mmax
15.0 kN·m
Vmax
15.0 kN
δmax
0.44 mm
L/13515
R115.0 kN| 15.0 kN·mR215.0 kN| -15.0 kN·m
Standard:
