HEM 280 — Dimensions, Weight & Section Properties
HEM heavy wide-flange beam per EN 10365 (DIN 1025-4)
HEM 280 is a HEM heavy wide-flange beam per EN 10365 (DIN 1025-4), 310 mm tall and 288 mm wide, weighing 189 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 | 310 mm |
| Flange width b | 288 mm |
| Web thickness tₘ | 18.5 mm |
| Flange thickness tᶠ | 33 mm |
| Root radius r | 24 mm |
Weight & Cross-Section
| Weight per meter | 189 kg/m |
| Weight of a 6 m bar | 1,134 kg |
| Weight of a 12 m bar | 2,268 kg |
| Cross-section area A | 240.2 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 39,550 cm⁴ |
| Section modulus Wₓ | 2,551 cm³ |
| Radius of gyration iₓ | 12.8 cm |
| Moment of inertia Iᵧ | 13,160 cm⁴ |
| Section modulus Wᵧ | 914 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 |
|---|---|---|---|---|---|---|
| HEM 260 | 290 × 268 | 172 | 31,310 | 2,159 | −9 % | −21 % |
| HEM 280 (this page) | 310 × 288 | 189 | 39,550 | 2,551 | — | — |
| HEM 300 | 340 × 310 | 238 | 59,200 | 3,482 | +26 % | +50 % |
Deflection example
A simply supported HEM 280 spanning 6 m with a 10 kN point load at midspan deflects 0.54 mm (E = 210 GPa, Ix = 39,550 cm⁴). The L/360 serviceability limit for this span is 16.7 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does HEM 280 weigh?
HEM 280 weighs 189 kg per meter. A standard 6 m bar weighs 1,134 kg and a 12 m bar 2,268 kg. The weight follows from the cross-section area of 240.2 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEM 280?
HEM 280 is 310 mm tall and 288 mm wide, with a web thickness of 18.5 mm, a flange thickness of 33 mm, and a root radius of 24 mm, per EN 10365 (DIN 1025-4).
What is the moment of inertia of HEM 280?
About the strong axis, Ix = 39,550 cm⁴ with a section modulus Wx = 2,551 cm³. About the weak axis, Iy = 13,160 cm⁴ and Wy = 914 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEM 280 or HEM 300 — what does one size up change?
HEM 300 is about 26% heavier (238 vs 189 kg/m) but about 50% stiffer (Ix 59,200 vs 39,550 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