HEA 340 vs HEB 340
- HEA 340 is 22 % lighter than HEB 340 (104.8 vs 134.2 kg/m).
- HEB 340 has 32 % higher strong-axis stiffness Iy.
- HEB 340 has 30 % higher weak-axis stiffness Iz, which governs columns and lateral stability.
- HEB 340 has 30 % higher plastic bending resistance (Wpl,y).
- Per kilogram of steel, HEB 340 is the more efficient bending section (Iy/G: 273 vs 264 cm⁴ per kg/m).
| Property | HEA 340 | HEB 340 |
|---|---|---|
| Height h [mm] | 330 | 340 |
| Flange width b [mm] | 300 | 300 |
| Web thickness tw [mm] | 9.5 | 12.0 |
| Flange thickness tf [mm] | 16.5 | 21.5 |
| Area A [cm²] | 133.5 | 170.9 |
| Mass G [kg/m] | 104.8 | 134.2 |
| Moment of inertia Iy [cm⁴] | 27 690 | 36 660 |
| Elastic modulus Wel,y [cm³] | 1 678 | 2 156 |
| Plastic modulus Wpl,y [cm³] | 1 850 | 2 408 |
| Moment of inertia Iz [cm⁴] | 7 436 | 9 690 |
| Radius of gyration iy [mm] | 144.0 | 146.5 |
| Radius of gyration iz [mm] | 74.6 | 75.3 |
| Torsion constant It [cm⁴] | 128.7 | 262.0 |
| Warping constant Iw [×10³ cm⁶] | 1 790.2 | 2 405.6 |
Highlighted value = the favourable one (higher stiffness/modulus, lower mass). Full property sets on the profile pages.