Formula 3

\begin{array}{l} λ_{ef} = l_{ef} \cdot \frac{h}{b ²} = 2.460 cm \cdot \frac{240 cm}{(12 cm) ²} = 4.100 > 225 \\ \frac{τ_{tor, d}}{k_{shape} \cdot f_{v, d}} (^{\frac{τ_{z, d}}{f_{v, d}}) 2} = \frac{0, 11 kN / cm ²}{1, 3 \cdot 0, 16 kN / cm ²} (^{\frac{0, 12 kN / cm ²}{0, 16 kN / cm ²}) 2} = 1, 1 \end{array}

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