HEM 400 — Dimensions, Weight & Section Properties
HEM heavy wide-flange beam per EN 10365 (DIN 1025-4)
HEM 400 is a HEM heavy wide-flange beam per EN 10365 (DIN 1025-4), 432 mm tall and 307 mm wide, weighing 256 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 | 432 mm |
| Flange width b | 307 mm |
| Web thickness tₘ | 21 mm |
| Flange thickness tᶠ | 40 mm |
| Root radius r | 27 mm |
Weight & Cross-Section
| Weight per meter | 256 kg/m |
| Weight of a 6 m bar | 1,536 kg |
| Weight of a 12 m bar | 3,072 kg |
| Cross-section area A | 325.8 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 104,100 cm⁴ |
| Section modulus Wₓ | 4,820 cm³ |
| Radius of gyration iₓ | 17.9 cm |
| Moment of inertia Iᵧ | 19,340 cm⁴ |
| Section modulus Wᵧ | 1,260 cm³ |
| Radius of gyration iᵧ | 7.7 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| HEM 360 | 395 × 308 | 250 | 84,870 | 4,297 | −2 % | −18 % |
| HEM 400 (this page) | 432 × 307 | 256 | 104,100 | 4,820 | — | — |
| HEM 450 | 478 × 307 | 263 | 131,500 | 5,501 | +3 % | +26 % |
Deflection example
A simply supported HEM 400 spanning 9 m with a 10 kN point load at midspan deflects 0.69 mm (E = 210 GPa, Ix = 104,100 cm⁴). The L/360 serviceability limit for this span is 25 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does HEM 400 weigh?
HEM 400 weighs 256 kg per meter. A standard 6 m bar weighs 1,536 kg and a 12 m bar 3,072 kg. The weight follows from the cross-section area of 325.8 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEM 400?
HEM 400 is 432 mm tall and 307 mm wide, with a web thickness of 21 mm, a flange thickness of 40 mm, and a root radius of 27 mm, per EN 10365 (DIN 1025-4).
What is the moment of inertia of HEM 400?
About the strong axis, Ix = 104,100 cm⁴ with a section modulus Wx = 4,820 cm³. About the weak axis, Iy = 19,340 cm⁴ and Wy = 1,260 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEM 400 or HEM 450 — what does one size up change?
HEM 450 is about 3% heavier (263 vs 256 kg/m) but about 26% stiffer (Ix 131,500 vs 104,100 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