Eurocode 3 Structural Steel Design
Design structural steel members according to EN 1993-1-1 standards. Our engine automates section classification and stability checks for any loading scenario.
Design Check Methodology
EC3 categorizes sections into Classes 1–4 based on width-to-thickness ratios. This is critical for determining whether a section can reach its full plastic capacity or if local buckling will limit the design.
Clause Compliance Coverage:
- Section Resistance (6.2): Checks for tension, compression, bending, and shear interaction.
- Flexural Buckling (6.3.1): Detailed stability analysis for compression members using Table 6.2 curves.
- LTB Resistance (6.3.2): Lateral-Torsional Buckling per clause 6.3.2.3 (rolled section method, Table 6.5) with f-factor correction.
- Interaction (6.3.3): Combined stability under axial force and biaxial bending using Annex B (Method 2) interaction factors.
Role of γM Factors
Partial safety factors account for material uncertainties. Standard values are γM0 = 1.0 and γM1 = 1.1 for most building designs.
Fabrication Types
Fabrication methods (rolled vs. welded) affect residual stresses, which in turn determine which EC3 buckling curve (a0, a, b, c, or d) is used.