HEB 340 — Dimensions, Weight & Section Properties
HEB wide-flange beam per EN 10365 (DIN 1025-2)
HEB 340 is a HEB wide-flange beam per EN 10365 (DIN 1025-2), 340 mm tall and 300 mm wide, weighing 134 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 | 340 mm |
| Flange width b | 300 mm |
| Web thickness tₘ | 12 mm |
| Flange thickness tᶠ | 21.5 mm |
| Root radius r | 27 mm |
Weight & Cross-Section
| Weight per meter | 134 kg/m |
| Weight of a 6 m bar | 804 kg |
| Weight of a 12 m bar | 1,608 kg |
| Cross-section area A | 171 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 36,660 cm⁴ |
| Section modulus Wₓ | 2,156 cm³ |
| Radius of gyration iₓ | 14.6 cm |
| Moment of inertia Iᵧ | 9,690 cm⁴ |
| Section modulus Wᵧ | 646 cm³ |
| Radius of gyration iᵧ | 7.53 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| HEB 320 | 320 × 300 | 127 | 30,820 | 1,926 | −5 % | −16 % |
| HEB 340 (this page) | 340 × 300 | 134 | 36,660 | 2,156 | — | — |
| HEB 360 | 360 × 300 | 142 | 43,190 | 2,400 | +6 % | +18 % |
Deflection example
A simply supported HEB 340 spanning 7 m with a 10 kN point load at midspan deflects 0.93 mm (E = 210 GPa, Ix = 36,660 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 HEB 340 weigh?
HEB 340 weighs 134 kg per meter. A standard 6 m bar weighs 804 kg and a 12 m bar 1,608 kg. The weight follows from the cross-section area of 171 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEB 340?
HEB 340 is 340 mm tall and 300 mm wide, with a web thickness of 12 mm, a flange thickness of 21.5 mm, and a root radius of 27 mm, per EN 10365 (DIN 1025-2).
What is the moment of inertia of HEB 340?
About the strong axis, Ix = 36,660 cm⁴ with a section modulus Wx = 2,156 cm³. About the weak axis, Iy = 9,690 cm⁴ and Wy = 646 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEB 340 or HEB 360 — what does one size up change?
HEB 360 is about 6% heavier (142 vs 134 kg/m) but about 18% stiffer (Ix 43,190 vs 36,660 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