EC2-1-1 RC Design Excel Toolkit (v3.2)

The EC2-1-1 RC Design Excel Toolkit (v3.2) implements the fundamental design philosophy of Eurocode 2—limit state design—with explicit separation between Ultimate Limit State (ULS) and Serviceability Limit State (SLS) verifications. It embeds key EC2 provisions such as the parabolic-rectangular stress block for concrete, design strengths (f_cd = α_cc·f_ck/γ_C), and steel constitutive models (bilinear elastic–perfectly plastic with f_yk and γ_S). The toolkit typically includes modular worksheets for beam flexure & shear, column interaction diagrams (N-M and N-M-V), slab design (including punching shear per EN 1992-1-1 §6.4.5), crack width estimation (using effective modulus and tension stiffening), and deflection control via deemed-to-satisfy span-to-depth ratios or rigorous quasi-permanent combination analysis. Each worksheet enforces mandatory input validation, automatic unit consistency checks (e.g., kN, MPa, mm), and clear visual feedback (e.g., pass/fail flags, color-coded results), promoting transparency and reducing manual calculation errors. Furthermore, v3.2 introduces enhanced features such as parametric section geometry definition, automated anchorage length verification per §8.4, and export-ready summary reports aligned with common engineering deliverables.