HEA 340 — Dimensions, Weight & Section Properties
HEA wide-flange beam per EN 10365 (DIN 1025-3)
HEA 340 is a HEA wide-flange beam per EN 10365 (DIN 1025-3), 330 mm tall and 300 mm wide, weighing 105 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 | 330 mm |
| Flange width b | 300 mm |
| Web thickness tₘ | 9.5 mm |
| Flange thickness tᶠ | 16.5 mm |
| Root radius r | 27 mm |
Weight & Cross-Section
| Weight per meter | 105 kg/m |
| Weight of a 6 m bar | 630 kg |
| Weight of a 12 m bar | 1,260 kg |
| Cross-section area A | 133 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 27,690 cm⁴ |
| Section modulus Wₓ | 1,678 cm³ |
| Radius of gyration iₓ | 14.4 cm |
| Moment of inertia Iᵧ | 7,436 cm⁴ |
| Section modulus Wᵧ | 496 cm³ |
| Radius of gyration iᵧ | 7.46 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| HEA 320 | 310 × 300 | 97.6 | 22,930 | 1,479 | −7 % | −17 % |
| HEA 340 (this page) | 330 × 300 | 105 | 27,690 | 1,678 | — | — |
| HEA 360 | 350 × 300 | 112 | 33,090 | 1,891 | +7 % | +20 % |
Deflection example
A simply supported HEA 340 spanning 7 m with a 10 kN point load at midspan deflects 1.23 mm (E = 210 GPa, Ix = 27,690 cm⁴). The L/360 serviceability limit for this span is 19.4 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does HEA 340 weigh?
HEA 340 weighs 105 kg per meter. A standard 6 m bar weighs 630 kg and a 12 m bar 1,260 kg. The weight follows from the cross-section area of 133 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEA 340?
HEA 340 is 330 mm tall and 300 mm wide, with a web thickness of 9.5 mm, a flange thickness of 16.5 mm, and a root radius of 27 mm, per EN 10365 (DIN 1025-3).
What is the moment of inertia of HEA 340?
About the strong axis, Ix = 27,690 cm⁴ with a section modulus Wx = 1,678 cm³. About the weak axis, Iy = 7,436 cm⁴ and Wy = 496 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEA 340 or HEA 360 — what does one size up change?
HEA 360 is about 7% heavier (112 vs 105 kg/m) but about 20% stiffer (Ix 33,090 vs 27,690 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