UPN 120 — Dimensions, Weight & Section Properties
UPN channel per DIN 1026-1
UPN 120 is a UPN channel per DIN 1026-1, 120 mm tall and 55 mm wide, weighing 13.4 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.
UPN 120: cross-section drawn to scale from the tabulated dimensions (h 120, b 55, tw 7, tf 9, r 9 mm)Dimensions (mm)
| Height h | 120 mm |
| Flange width b | 55 mm |
| Web thickness tₘ | 7 mm |
| Flange thickness tᶠ | 9 mm |
| Root radius r | 9 mm |
Weight & Cross-Section
| Weight per meter | 13.4 kg/m |
| Weight of a 6 m bar | 80.4 kg |
| Weight of a 12 m bar | 160.8 kg |
| Cross-section area A | 17 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 364 cm⁴ |
| Section modulus Wₓ | 60.7 cm³ |
| Radius of gyration iₓ | 4.62 cm |
| Moment of inertia Iᵧ | 43.2 cm⁴ |
| Section modulus Wᵧ | 11.1 cm³ |
| Radius of gyration iᵧ | 1.59 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|
| UPN 100 | 100 × 50 | 10.6 | 206 | 41.2 | −21 % | −43 % |
| UPN 120 (this page) | 120 × 55 | 13.4 | 364 | 60.7 | — | — |
| UPN 140 | 140 × 60 | 16 | 605 | 86.4 | +19 % | +66 % |
Deflection example
A simply supported UPN 120 spanning 2 m with a 10 kN point load at midspan deflects 2.18 mm (E = 210 GPa, Ix = 364 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 UPN 120 weigh?
UPN 120 weighs 13.4 kg per meter. A standard 6 m bar weighs 80.4 kg and a 12 m bar 160.8 kg. The weight follows from the cross-section area of 17 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of UPN 120?
UPN 120 is 120 mm tall and 55 mm wide, with a web thickness of 7 mm, a flange thickness of 9 mm, and a root radius of 9 mm, per DIN 1026-1.
What is the moment of inertia of UPN 120?
About the strong axis, Ix = 364 cm⁴ with a section modulus Wx = 60.7 cm³. About the weak axis, Iy = 43.2 cm⁴ and Wy = 11.1 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
UPN 120 or UPN 140 — what does one size up change?
UPN 140 is about 19% heavier (16 vs 13.4 kg/m) but about 66% stiffer (Ix 605 vs 364 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