IPN 300 — Dimensions, Weight & Section Properties
IPN I-beam per EN 10365 (DIN 1025-1)
IPN 300 is a IPN I-beam per EN 10365 (DIN 1025-1), 300 mm tall and 125 mm wide, weighing 54.2 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 | 300 mm |
| Flange width b | 125 mm |
| Web thickness tₘ | 10.8 mm |
| Flange thickness tᶠ | 16.2 mm |
| Root radius r | 10.8 mm |
Weight & Cross-Section
| Weight per meter | 54.2 kg/m |
| Weight of a 6 m bar | 325.2 kg |
| Weight of a 12 m bar | 650.4 kg |
| Cross-section area A | 69 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 9,800 cm⁴ |
| Section modulus Wₓ | 653 cm³ |
| Radius of gyration iₓ | 11.9 cm |
| Moment of inertia Iᵧ | 451 cm⁴ |
| Section modulus Wᵧ | 72.2 cm³ |
| Radius of gyration iᵧ | 2.56 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|---|---|---|---|---|---|
| IPN 280 | 280 × 119 | 47.9 | 7,590 | 542 | −12 % | −23 % |
| IPN 300 (this page) | 300 × 125 | 54.2 | 9,800 | 653 | — | — |
| IPN 320 | 320 × 131 | 61 | 12,510 | 782 | +13 % | +28 % |
Deflection example
A simply supported IPN 300 spanning 6 m with a 10 kN point load at midspan deflects 2.19 mm (E = 210 GPa, Ix = 9,800 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 300 weigh?
IPN 300 weighs 54.2 kg per meter. A standard 6 m bar weighs 325.2 kg and a 12 m bar 650.4 kg. The weight follows from the cross-section area of 69 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of IPN 300?
IPN 300 is 300 mm tall and 125 mm wide, with a web thickness of 10.8 mm, a flange thickness of 16.2 mm, and a root radius of 10.8 mm, per EN 10365 (DIN 1025-1).
What is the moment of inertia of IPN 300?
About the strong axis, Ix = 9,800 cm⁴ with a section modulus Wx = 653 cm³. About the weak axis, Iy = 451 cm⁴ and Wy = 72.2 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
IPN 300 or IPN 320 — what does one size up change?
IPN 320 is about 13% heavier (61 vs 54.2 kg/m) but about 28% stiffer (Ix 12,510 vs 9,800 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