HEB 120 — Dimensions, Weight & Section Properties
HEB wide-flange beam per EN 10365 (DIN 1025-2)
HEB 120 is a HEB wide-flange beam per EN 10365 (DIN 1025-2), 120 mm tall and 120 mm wide, weighing 26.7 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 | 120 mm |
| Flange width b | 120 mm |
| Web thickness tₘ | 6.5 mm |
| Flange thickness tᶠ | 11 mm |
| Root radius r | 12 mm |
Weight & Cross-Section
| Weight per meter | 26.7 kg/m |
| Weight of a 6 m bar | 160.2 kg |
| Weight of a 12 m bar | 320.4 kg |
| Cross-section area A | 34 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 864 cm⁴ |
| Section modulus Wₓ | 144 cm³ |
| Radius of gyration iₓ | 5.04 cm |
| Moment of inertia Iᵧ | 318 cm⁴ |
| Section modulus Wᵧ | 52.9 cm³ |
| Radius of gyration iᵧ | 3.06 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| HEB 100 | 100 × 100 | 20.4 | 450 | 89.9 | −24 % | −48 % |
| HEB 120 (this page) | 120 × 120 | 26.7 | 864 | 144 | — | — |
| HEB 140 | 140 × 140 | 33.7 | 1,509 | 216 | +26 % | +75 % |
Deflection example
A simply supported HEB 120 spanning 2 m with a 10 kN point load at midspan deflects 0.92 mm (E = 210 GPa, Ix = 864 cm⁴). The L/360 serviceability limit for this span is 5.6 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does HEB 120 weigh?
HEB 120 weighs 26.7 kg per meter. A standard 6 m bar weighs 160.2 kg and a 12 m bar 320.4 kg. The weight follows from the cross-section area of 34 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEB 120?
HEB 120 is 120 mm tall and 120 mm wide, with a web thickness of 6.5 mm, a flange thickness of 11 mm, and a root radius of 12 mm, per EN 10365 (DIN 1025-2).
What is the moment of inertia of HEB 120?
About the strong axis, Ix = 864 cm⁴ with a section modulus Wx = 144 cm³. About the weak axis, Iy = 318 cm⁴ and Wy = 52.9 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEB 120 or HEB 140 — what does one size up change?
HEB 140 is about 26% heavier (33.7 vs 26.7 kg/m) but about 75% stiffer (Ix 1,509 vs 864 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