UPN 65 — Dimensions, Weight & Section Properties
UPN channel per DIN 1026-1
UPN 65 is a UPN channel per DIN 1026-1, 65 mm tall and 42 mm wide, weighing 7.09 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 | 65 mm |
| Flange width b | 42 mm |
| Web thickness tₘ | 5.5 mm |
| Flange thickness tᶠ | 7.5 mm |
| Root radius r | 7.5 mm |
Weight & Cross-Section
| Weight per meter | 7.09 kg/m |
| Weight of a 6 m bar | 42.5 kg |
| Weight of a 12 m bar | 85.1 kg |
| Cross-section area A | 9.03 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 57.5 cm⁴ |
| Section modulus Wₓ | 17.7 cm³ |
| Radius of gyration iₓ | 2.52 cm |
| Moment of inertia Iᵧ | 14.1 cm⁴ |
| Section modulus Wᵧ | 5.07 cm³ |
| Radius of gyration iᵧ | 1.25 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| UPN 50 | 50 × 38 | 5.59 | 26.4 | 10.6 | −21 % | −54 % |
| UPN 65 (this page) | 65 × 42 | 7.09 | 57.5 | 17.7 | — | — |
| UPN 80 | 80 × 45 | 8.64 | 106 | 26.5 | +22 % | +84 % |
Deflection example
A simply supported UPN 65 spanning 2 m with a 10 kN point load at midspan deflects 13.8 mm (E = 210 GPa, Ix = 57.5 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 65 weigh?
UPN 65 weighs 7.09 kg per meter. A standard 6 m bar weighs 42.5 kg and a 12 m bar 85.1 kg. The weight follows from the cross-section area of 9.03 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of UPN 65?
UPN 65 is 65 mm tall and 42 mm wide, with a web thickness of 5.5 mm, a flange thickness of 7.5 mm, and a root radius of 7.5 mm, per DIN 1026-1.
What is the moment of inertia of UPN 65?
About the strong axis, Ix = 57.5 cm⁴ with a section modulus Wx = 17.7 cm³. About the weak axis, Iy = 14.1 cm⁴ and Wy = 5.07 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
UPN 65 or UPN 80 — what does one size up change?
UPN 80 is about 22% heavier (8.64 vs 7.09 kg/m) but about 84% stiffer (Ix 106 vs 57.5 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