HEM 300 — Dimensions, Weight & Section Properties
HEM heavy wide-flange beam per EN 10365 (DIN 1025-4)
HEM 300 is a HEM heavy wide-flange beam per EN 10365 (DIN 1025-4), 340 mm tall and 310 mm wide, weighing 238 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.
HEM 300: cross-section drawn to scale from the tabulated dimensions (h 340, b 310, tw 21, tf 39, r 27 mm)Dimensions (mm)
| Height h | 340 mm |
| Flange width b | 310 mm |
| Web thickness tₘ | 21 mm |
| Flange thickness tᶠ | 39 mm |
| Root radius r | 27 mm |
Weight & Cross-Section
| Weight per meter | 238 kg/m |
| Weight of a 6 m bar | 1,428 kg |
| Weight of a 12 m bar | 2,856 kg |
| Cross-section area A | 303.1 cm² |
Section Properties (strong / weak axis)
| Moment of inertia Iₓ | 59,200 cm⁴ |
| Section modulus Wₓ | 3,482 cm³ |
| Radius of gyration iₓ | 14 cm |
| Moment of inertia Iᵧ | 19,400 cm⁴ |
| Section modulus Wᵧ | 1,252 cm³ |
| Radius of gyration iᵧ | 8 cm |
Compared with the neighbouring sizes
| Profile | h × b (mm) | G (kg/m) | Iₓ (cm⁴) | Wₓ (cm³) | Δ weight | Δ Iₓ |
|---|
| HEM 280 | 310 × 288 | 189 | 39,550 | 2,551 | −21 % | −33 % |
| HEM 300 (this page) | 340 × 310 | 238 | 59,200 | 3,482 | — | — |
| HEM 320 | 359 × 309 | 245 | 68,130 | 3,796 | +3 % | +15 % |
Deflection example
A simply supported HEM 300 spanning 7 m with a 10 kN point load at midspan deflects 0.57 mm (E = 210 GPa, Ix = 59,200 cm⁴). The L/360 serviceability limit for this span is 19.4 mm — the profile passes this quick check.
Calculate your own span and load →
Frequently Asked Questions
How much does HEM 300 weigh?
HEM 300 weighs 238 kg per meter. A standard 6 m bar weighs 1,428 kg and a 12 m bar 2,856 kg. The weight follows from the cross-section area of 303.1 cm² multiplied by the steel density of 7,850 kg/m³.
What are the dimensions of HEM 300?
HEM 300 is 340 mm tall and 310 mm wide, with a web thickness of 21 mm, a flange thickness of 39 mm, and a root radius of 27 mm, per EN 10365 (DIN 1025-4).
What is the moment of inertia of HEM 300?
About the strong axis, Ix = 59,200 cm⁴ with a section modulus Wx = 3,482 cm³. About the weak axis, Iy = 19,400 cm⁴ and Wy = 1,252 cm³. Use the beam deflection calculator to turn these into deflection and stress for your span and load.
HEM 300 or HEM 320 — what does one size up change?
HEM 320 is about 3% heavier (245 vs 238 kg/m) but about 15% stiffer (Ix 68,130 vs 59,200 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