Fórmula 18

V_{Rd, 4} = A_{v, net} \cdot \frac{f_{up}}{\sqrt{3} \cdot γ_{M 2}} = 0, 8 \cdot (12, 0 - 2 \cdot 1, 8) \cdot \frac{36, 0}{\sqrt{3} \cdot 1, 25} = 111, 74 \to η = \frac{16, 32}{111, 74} = 0, 15 < 1, 0

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