HEA 400 — Dimensions, Weight & Section Properties
HEA wide-flange beam per EN 10365 (DIN 1025-3)
HEA 400 is a HEA wide-flange beam per EN 10365 (DIN 1025-3), 390 mm tall and 300 mm wide, weighing 125 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 | 390 mm |
| Flange width b | 300 mm |
| Web thickness tₘ | 11 mm |
| Flange thickness tᶠ | 19 mm |
| Root radius r | 27 mm |
Weight & Cross-Section
| Weight per meter | 125 kg/m |
| Weight of a 6 m bar | 750 kg |
| Weight of a 12 m bar | 1,500 kg |
| Cross-section area A | 159 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 45,070 cm⁴ |
| Section modulus Wₓ | 2,311 cm³ |
| Radius of gyration iₓ | 16.8 cm |
| Moment of inertia Iᵧ | 8,564 cm⁴ |
| Section modulus Wᵧ | 571 cm³ |
| Radius of gyration iᵧ | 7.34 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| HEA 360 | 350 × 300 | 112 | 33,090 | 1,891 | −10 % | −27 % |
| HEA 400 (this page) | 390 × 300 | 125 | 45,070 | 2,311 | — | — |
| HEA 450 | 440 × 300 | 140 | 63,720 | 2,896 | +12 % | +41 % |
Deflection example
A simply supported HEA 400 spanning 8 m with a 10 kN point load at midspan deflects 1.13 mm (E = 210 GPa, Ix = 45,070 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 HEA 400 weigh?
HEA 400 weighs 125 kg per meter. A standard 6 m bar weighs 750 kg and a 12 m bar 1,500 kg. The weight follows from the cross-section area of 159 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEA 400?
HEA 400 is 390 mm tall and 300 mm wide, with a web thickness of 11 mm, a flange thickness of 19 mm, and a root radius of 27 mm, per EN 10365 (DIN 1025-3).
What is the moment of inertia of HEA 400?
About the strong axis, Ix = 45,070 cm⁴ with a section modulus Wx = 2,311 cm³. About the weak axis, Iy = 8,564 cm⁴ and Wy = 571 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEA 400 or HEA 450 — what does one size up change?
HEA 450 is about 12% heavier (140 vs 125 kg/m) but about 41% stiffer (Ix 63,720 vs 45,070 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