IPN 380 — Dimensions, Weight & Section Properties
IPN I-beam per EN 10365 (DIN 1025-1)
IPN 380 is a IPN I-beam per EN 10365 (DIN 1025-1), 380 mm tall and 149 mm wide, weighing 84 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 | 380 mm |
| Flange width b | 149 mm |
| Web thickness tₘ | 13.7 mm |
| Flange thickness tᶠ | 20.5 mm |
| Root radius r | 13.7 mm |
Weight & Cross-Section
| Weight per meter | 84 kg/m |
| Weight of a 6 m bar | 504 kg |
| Weight of a 12 m bar | 1,008 kg |
| Cross-section area A | 107 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 24,010 cm⁴ |
| Section modulus Wₓ | 1,260 cm³ |
| Radius of gyration iₓ | 15 cm |
| Moment of inertia Iᵧ | 975 cm⁴ |
| Section modulus Wᵧ | 131 cm³ |
| Radius of gyration iᵧ | 3.02 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| IPN 360 | 360 × 143 | 76.1 | 19,610 | 1,090 | −9 % | −18 % |
| IPN 380 (this page) | 380 × 149 | 84 | 24,010 | 1,260 | — | — |
| IPN 400 | 400 × 155 | 92.4 | 29,210 | 1,460 | +10 % | +22 % |
Deflection example
A simply supported IPN 380 spanning 8 m with a 10 kN point load at midspan deflects 2.12 mm (E = 210 GPa, Ix = 24,010 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 IPN 380 weigh?
IPN 380 weighs 84 kg per meter. A standard 6 m bar weighs 504 kg and a 12 m bar 1,008 kg. The weight follows from the cross-section area of 107 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of IPN 380?
IPN 380 is 380 mm tall and 149 mm wide, with a web thickness of 13.7 mm, a flange thickness of 20.5 mm, and a root radius of 13.7 mm, per EN 10365 (DIN 1025-1).
What is the moment of inertia of IPN 380?
About the strong axis, Ix = 24,010 cm⁴ with a section modulus Wx = 1,260 cm³. About the weak axis, Iy = 975 cm⁴ and Wy = 131 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
IPN 380 or IPN 400 — what does one size up change?
IPN 400 is about 10% heavier (92.4 vs 84 kg/m) but about 22% stiffer (Ix 29,210 vs 24,010 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