IPN 180 — Dimensions, Weight & Section Properties
IPN I-beam per EN 10365 (DIN 1025-1)
IPN 180 is a IPN I-beam per EN 10365 (DIN 1025-1), 180 mm tall and 82 mm wide, weighing 21.9 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 | 180 mm |
| Flange width b | 82 mm |
| Web thickness tₘ | 6.9 mm |
| Flange thickness tᶠ | 10.4 mm |
| Root radius r | 6.9 mm |
Weight & Cross-Section
| Weight per meter | 21.9 kg/m |
| Weight of a 6 m bar | 131.4 kg |
| Weight of a 12 m bar | 262.8 kg |
| Cross-section area A | 27.9 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 1,450 cm⁴ |
| Section modulus Wₓ | 161 cm³ |
| Radius of gyration iₓ | 7.2 cm |
| Moment of inertia Iᵧ | 81.3 cm⁴ |
| Section modulus Wᵧ | 19.8 cm³ |
| Radius of gyration iᵧ | 1.71 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| IPN 160 | 160 × 74 | 17.9 | 935 | 117 | −18 % | −36 % |
| IPN 180 (this page) | 180 × 82 | 21.9 | 1,450 | 161 | — | — |
| IPN 200 | 200 × 90 | 26.2 | 2,140 | 214 | +20 % | +48 % |
Deflection example
A simply supported IPN 180 spanning 4 m with a 10 kN point load at midspan deflects 4.38 mm (E = 210 GPa, Ix = 1,450 cm⁴). The L/360 serviceability limit for this span is 11.1 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does IPN 180 weigh?
IPN 180 weighs 21.9 kg per meter. A standard 6 m bar weighs 131.4 kg and a 12 m bar 262.8 kg. The weight follows from the cross-section area of 27.9 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of IPN 180?
IPN 180 is 180 mm tall and 82 mm wide, with a web thickness of 6.9 mm, a flange thickness of 10.4 mm, and a root radius of 6.9 mm, per EN 10365 (DIN 1025-1).
What is the moment of inertia of IPN 180?
About the strong axis, Ix = 1,450 cm⁴ with a section modulus Wx = 161 cm³. About the weak axis, Iy = 81.3 cm⁴ and Wy = 19.8 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
IPN 180 or IPN 200 — what does one size up change?
IPN 200 is about 20% heavier (26.2 vs 21.9 kg/m) but about 48% stiffer (Ix 2,140 vs 1,450 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