UPN 80 — Dimensions, Weight & Section Properties
UPN channel per DIN 1026-1
UPN 80 is a UPN channel per DIN 1026-1, 80 mm tall and 45 mm wide, weighing 8.64 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 | 80 mm |
| Flange width b | 45 mm |
| Web thickness tₘ | 6 mm |
| Flange thickness tᶠ | 8 mm |
| Root radius r | 8 mm |
Weight & Cross-Section
| Weight per meter | 8.64 kg/m |
| Weight of a 6 m bar | 51.8 kg |
| Weight of a 12 m bar | 103.7 kg |
| Cross-section area A | 11 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 106 cm⁴ |
| Section modulus Wₓ | 26.5 cm³ |
| Radius of gyration iₓ | 3.1 cm |
| Moment of inertia Iᵧ | 19.4 cm⁴ |
| Section modulus Wᵧ | 6.36 cm³ |
| Radius of gyration iᵧ | 1.33 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| UPN 65 | 65 × 42 | 7.09 | 57.5 | 17.7 | −18 % | −46 % |
| UPN 80 (this page) | 80 × 45 | 8.64 | 106 | 26.5 | — | — |
| UPN 100 | 100 × 50 | 10.6 | 206 | 41.2 | +23 % | +94 % |
Deflection example
A simply supported UPN 80 spanning 2 m with a 10 kN point load at midspan deflects 7.49 mm (E = 210 GPa, Ix = 106 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 80 weigh?
UPN 80 weighs 8.64 kg per meter. A standard 6 m bar weighs 51.8 kg and a 12 m bar 103.7 kg. The weight follows from the cross-section area of 11 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of UPN 80?
UPN 80 is 80 mm tall and 45 mm wide, with a web thickness of 6 mm, a flange thickness of 8 mm, and a root radius of 8 mm, per DIN 1026-1.
What is the moment of inertia of UPN 80?
About the strong axis, Ix = 106 cm⁴ with a section modulus Wx = 26.5 cm³. About the weak axis, Iy = 19.4 cm⁴ and Wy = 6.36 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
UPN 80 or UPN 100 — what does one size up change?
UPN 100 is about 23% heavier (10.6 vs 8.64 kg/m) but about 94% stiffer (Ix 206 vs 106 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