IPN 100 — Dimensions, Weight & Section Properties
IPN I-beam per EN 10365 (DIN 1025-1)
IPN 100 is a IPN I-beam per EN 10365 (DIN 1025-1), 100 mm tall and 50 mm wide, weighing 8.34 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.
IPN 100: cross-section drawn to scale from the tabulated dimensions (h 100, b 50, tw 4.5, tf 6.8, r 4.5 mm)Dimensions (mm)
| Height h | 100 mm |
| Flange width b | 50 mm |
| Web thickness tₘ | 4.5 mm |
| Flange thickness tᶠ | 6.8 mm |
| Root radius r | 4.5 mm |
Weight & Cross-Section
| Weight per meter | 8.34 kg/m |
| Weight of a 6 m bar | 50 kg |
| Weight of a 12 m bar | 100.1 kg |
| Cross-section area A | 10.6 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 171 cm⁴ |
| Section modulus Wₓ | 34.2 cm³ |
| Radius of gyration iₓ | 4.01 cm |
| Moment of inertia Iᵧ | 12.2 cm⁴ |
| Section modulus Wᵧ | 4.88 cm³ |
| Radius of gyration iᵧ | 1.07 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|
| IPN 80 | 80 × 42 | 5.94 | 77.8 | 19.5 | −29 % | −55 % |
| IPN 100 (this page) | 100 × 50 | 8.34 | 171 | 34.2 | — | — |
| IPN 120 | 120 × 58 | 11.1 | 328 | 54.7 | +33 % | +92 % |
Deflection example
A simply supported IPN 100 spanning 2 m with a 10 kN point load at midspan deflects 4.64 mm (E = 210 GPa, Ix = 171 cm⁴). The L/360 serviceability limit for this span is 5.6 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does IPN 100 weigh?
IPN 100 weighs 8.34 kg per meter. A standard 6 m bar weighs 50 kg and a 12 m bar 100.1 kg. The weight follows from the cross-section area of 10.6 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of IPN 100?
IPN 100 is 100 mm tall and 50 mm wide, with a web thickness of 4.5 mm, a flange thickness of 6.8 mm, and a root radius of 4.5 mm, per EN 10365 (DIN 1025-1).
What is the moment of inertia of IPN 100?
About the strong axis, Ix = 171 cm⁴ with a section modulus Wx = 34.2 cm³. About the weak axis, Iy = 12.2 cm⁴ and Wy = 4.88 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
IPN 100 or IPN 120 — what does one size up change?
IPN 120 is about 33% heavier (11.1 vs 8.34 kg/m) but about 92% stiffer (Ix 328 vs 171 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