UPN 50 — Dimensions, Weight & Section Properties
UPN channel per DIN 1026-1
UPN 50 is a UPN channel per DIN 1026-1, 50 mm tall and 38 mm wide, weighing 5.59 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 | 50 mm |
| Flange width b | 38 mm |
| Web thickness tₘ | 5 mm |
| Flange thickness tᶠ | 7 mm |
| Root radius r | 7 mm |
Weight & Cross-Section
| Weight per meter | 5.59 kg/m |
| Weight of a 6 m bar | 33.5 kg |
| Weight of a 12 m bar | 67.1 kg |
| Cross-section area A | 7.12 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 26.4 cm⁴ |
| Section modulus Wₓ | 10.6 cm³ |
| Radius of gyration iₓ | 1.92 cm |
| Moment of inertia Iᵧ | 9.12 cm⁴ |
| Section modulus Wᵧ | 3.75 cm³ |
| Radius of gyration iᵧ | 1.13 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| UPN 50 (this page) | 50 × 38 | 5.59 | 26.4 | 10.6 | — | — |
| UPN 65 | 65 × 42 | 7.09 | 57.5 | 17.7 | +27 % | +118 % |
Deflection example
A simply supported UPN 50 spanning 2 m with a 10 kN point load at midspan deflects 30.06 mm (E = 210 GPa, Ix = 26.4 cm⁴). The L/360 serviceability limit for this span is 5.6 mm — the profile does NOT pass this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does UPN 50 weigh?
UPN 50 weighs 5.59 kg per meter. A standard 6 m bar weighs 33.5 kg and a 12 m bar 67.1 kg. The weight follows from the cross-section area of 7.12 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of UPN 50?
UPN 50 is 50 mm tall and 38 mm wide, with a web thickness of 5 mm, a flange thickness of 7 mm, and a root radius of 7 mm, per DIN 1026-1.
What is the moment of inertia of UPN 50?
About the strong axis, Ix = 26.4 cm⁴ with a section modulus Wx = 10.6 cm³. About the weak axis, Iy = 9.12 cm⁴ and Wy = 3.75 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
UPN 50 or UPN 65 — what does one size up change?
UPN 65 is about 27% heavier (7.09 vs 5.59 kg/m) but about 118% stiffer (Ix 57.5 vs 26.4 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