HEA 900 vs HEB 900
- HEA 900 is 14 % lighter than HEB 900 (251.6 vs 291.5 kg/m).
- HEB 900 has 17 % higher strong-axis stiffness Iy.
- HEB 900 has 17 % higher weak-axis stiffness Iz, which governs columns and lateral stability.
- HEB 900 has 16 % higher plastic bending resistance (Wpl,y).
- Per kilogram of steel, both are similarly efficient in bending (Iy/G ≈ 1 686 cm⁴ per kg/m).
| Property | HEA 900 | HEB 900 |
|---|---|---|
| Height h [mm] | 890 | 900 |
| Flange width b [mm] | 300 | 300 |
| Web thickness tw [mm] | 16.0 | 18.5 |
| Flange thickness tf [mm] | 30.0 | 35.0 |
| Area A [cm²] | 320.5 | 371.3 |
| Mass G [kg/m] | 251.6 | 291.5 |
| Moment of inertia Iy [cm⁴] | 422 100 | 494 100 |
| Elastic modulus Wel,y [cm³] | 9 485 | 10 980 |
| Plastic modulus Wpl,y [cm³] | 10 810 | 12 580 |
| Moment of inertia Iz [cm⁴] | 13 550 | 15 820 |
| Radius of gyration iy [mm] | 362.9 | 364.8 |
| Radius of gyration iz [mm] | 65.0 | 65.3 |
| Torsion constant It [cm⁴] | 751.0 | 1 154.0 |
| Warping constant Iw [×10³ cm⁶] | 24 748.0 | 29 196.0 |
Highlighted value = the favourable one (higher stiffness/modulus, lower mass). Full property sets on the profile pages.