IPE 400 — Dimensions, Weight & Section Properties
IPE I-beam per EN 10365 (DIN 1025-5)
IPE 400 is a IPE I-beam per EN 10365 (DIN 1025-5), 400 mm tall and 180 mm wide, weighing 66.3 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 | 400 mm |
| Flange width b | 180 mm |
| Web thickness tₘ | 8.6 mm |
| Flange thickness tᶠ | 13.5 mm |
| Root radius r | 21 mm |
Weight & Cross-Section
| Weight per meter | 66.3 kg/m |
| Weight of a 6 m bar | 397.8 kg |
| Weight of a 12 m bar | 795.6 kg |
| Cross-section area A | 84.5 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 23,130 cm⁴ |
| Section modulus Wₓ | 1,156 cm³ |
| Radius of gyration iₓ | 16.5 cm |
| Moment of inertia Iᵧ | 1,318 cm⁴ |
| Section modulus Wᵧ | 146 cm³ |
| Radius of gyration iᵧ | 3.95 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| IPE 360 | 360 × 170 | 57.1 | 16,270 | 904 | −14 % | −30 % |
| IPE 400 (this page) | 400 × 180 | 66.3 | 23,130 | 1,156 | — | — |
| IPE 450 | 450 × 190 | 77.6 | 33,740 | 1,500 | +17 % | +46 % |
Deflection example
A simply supported IPE 400 spanning 8 m with a 10 kN point load at midspan deflects 2.2 mm (E = 210 GPa, Ix = 23,130 cm⁴). The L/360 serviceability limit for this span is 22.2 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does IPE 400 weigh?
IPE 400 weighs 66.3 kg per meter. A standard 6 m bar weighs 397.8 kg and a 12 m bar 795.6 kg. The weight follows from the cross-section area of 84.5 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of IPE 400?
IPE 400 is 400 mm tall and 180 mm wide, with a web thickness of 8.6 mm, a flange thickness of 13.5 mm, and a root radius of 21 mm, per EN 10365 (DIN 1025-5).
What is the moment of inertia of IPE 400?
About the strong axis, Ix = 23,130 cm⁴ with a section modulus Wx = 1,156 cm³. About the weak axis, Iy = 1,318 cm⁴ and Wy = 146 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
IPE 400 or IPE 450 — what does one size up change?
IPE 450 is about 17% heavier (77.6 vs 66.3 kg/m) but about 46% stiffer (Ix 33,740 vs 23,130 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