IPN 320 — Dimensions, Weight & Section Properties
IPN I-beam per EN 10365 (DIN 1025-1)
IPN 320 is a IPN I-beam per EN 10365 (DIN 1025-1), 320 mm tall and 131 mm wide, weighing 61 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 | 320 mm |
| Flange width b | 131 mm |
| Web thickness tₘ | 11.5 mm |
| Flange thickness tᶠ | 17.3 mm |
| Root radius r | 11.5 mm |
Weight & Cross-Section
| Weight per meter | 61 kg/m |
| Weight of a 6 m bar | 366 kg |
| Weight of a 12 m bar | 732 kg |
| Cross-section area A | 77.7 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 12,510 cm⁴ |
| Section modulus Wₓ | 782 cm³ |
| Radius of gyration iₓ | 12.7 cm |
| Moment of inertia Iᵧ | 555 cm⁴ |
| Section modulus Wᵧ | 84.7 cm³ |
| Radius of gyration iᵧ | 2.67 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| IPN 300 | 300 × 125 | 54.2 | 9,800 | 653 | −11 % | −22 % |
| IPN 320 (this page) | 320 × 131 | 61 | 12,510 | 782 | — | — |
| IPN 340 | 340 × 137 | 68 | 15,700 | 923 | +11 % | +25 % |
Deflection example
A simply supported IPN 320 spanning 6 m with a 10 kN point load at midspan deflects 1.71 mm (E = 210 GPa, Ix = 12,510 cm⁴). The L/360 serviceability limit for this span is 16.7 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does IPN 320 weigh?
IPN 320 weighs 61 kg per meter. A standard 6 m bar weighs 366 kg and a 12 m bar 732 kg. The weight follows from the cross-section area of 77.7 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of IPN 320?
IPN 320 is 320 mm tall and 131 mm wide, with a web thickness of 11.5 mm, a flange thickness of 17.3 mm, and a root radius of 11.5 mm, per EN 10365 (DIN 1025-1).
What is the moment of inertia of IPN 320?
About the strong axis, Ix = 12,510 cm⁴ with a section modulus Wx = 782 cm³. About the weak axis, Iy = 555 cm⁴ and Wy = 84.7 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
IPN 320 or IPN 340 — what does one size up change?
IPN 340 is about 11% heavier (68 vs 61 kg/m) but about 25% stiffer (Ix 15,700 vs 12,510 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