Formula 2

F_{t, Rd} = \frac{k_{2} \cdot f_{ub} \cdot A_{s}}{γ_{M 2}}

F_{t, Rd} = \frac{0.9 \cdot 1000 \frac{N}{{mm}^{2}} \cdot 245 {mm}^{2}}{1.25} = 176.4 kN

k₂	Factor for tensile resistance [-]
f_ub	Tensile resistance of bolt material [N/mm²]
A_s	Stress cross-section [mm²]
γ_M2	Partial safety factor of bolt [-]

Do you have any questions?