The EC2 design (which had an outdated EC2 ENV 1992-1-1:1991 code version) is no longer available through the Batch mode. It is moved to interactive Concrete Design Mode, where the EN 1992-1-1:2004 is implemented. In RC Designer, the concrete grade has two options - either concrete grade, e.g. C35/45, or user Fck (Cylinder Strength).
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