HEB 400 — Dimensions, Weight & Section Properties
HEB wide-flange beam per EN 10365 (DIN 1025-2)
HEB 400 is a HEB wide-flange beam per EN 10365 (DIN 1025-2), 400 mm tall and 300 mm wide, weighing 155 kg per meter. All dimensions and section properties below are the standard published values used in structural design across Europe.
Typical uses: floor beams, columns, frames, and general steel construction. For a quick strength check, use the deflection example below or open the beam calculator with your own span and load.
Dimensions (mm)
| Height h | 400 mm |
| Flange width b | 300 mm |
| Web thickness tₘ | 13.5 mm |
| Flange thickness tᶠ | 24 mm |
| Root radius r | 27 mm |
Weight & Cross-Section
| Weight per meter | 155 kg/m |
| Weight of a 6 m bar | 930 kg |
| Weight of a 12 m bar | 1,860 kg |
| Cross-section area A | 198 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 57,680 cm⁴ |
| Section modulus Wₓ | 2,884 cm³ |
| Radius of gyration iₓ | 17.1 cm |
| Moment of inertia Iᵧ | 10,820 cm⁴ |
| Section modulus Wᵧ | 721 cm³ |
| Radius of gyration iᵧ | 7.4 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| HEB 360 | 360 × 300 | 142 | 43,190 | 2,400 | −8 % | −25 % |
| HEB 400 (this page) | 400 × 300 | 155 | 57,680 | 2,884 | — | — |
| HEB 450 | 450 × 300 | 171 | 79,890 | 3,551 | +10 % | +39 % |
Deflection example
A simply supported HEB 400 spanning 8 m with a 10 kN point load at midspan deflects 0.88 mm (E = 210 GPa, Ix = 57,680 cm⁴). The L/360 serviceability limit for this span is 22.2 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does HEB 400 weigh?
HEB 400 weighs 155 kg per meter. A standard 6 m bar weighs 930 kg and a 12 m bar 1,860 kg. The weight follows from the cross-section area of 198 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEB 400?
HEB 400 is 400 mm tall and 300 mm wide, with a web thickness of 13.5 mm, a flange thickness of 24 mm, and a root radius of 27 mm, per EN 10365 (DIN 1025-2).
What is the moment of inertia of HEB 400?
About the strong axis, Ix = 57,680 cm⁴ with a section modulus Wx = 2,884 cm³. About the weak axis, Iy = 10,820 cm⁴ and Wy = 721 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEB 400 or HEB 450 — what does one size up change?
HEB 450 is about 10% heavier (171 vs 155 kg/m) but about 39% stiffer (Ix 79,890 vs 57,680 cm⁴). Going one size up is usually the cheapest way to cut deflection, because stiffness grows much faster than weight.
Values are entered from the governing standard’s published tables and cross-checked programmatically against its mass and section formulas before publication. Spotted an error? Write to advertising@metalabout.net — verified corrections ship within days. About