Required Punching Reinforcement

A_{SW} = \frac{(v_{Ed} - 0, 75 \cdot v_{Rd, c}) \cdot d \cdot u_{1}}{1, 5 \cdot \frac{d}{s_{r}} \cdot f_{ywd, ef} \cdot \sin α}

v_Ed	Related shear force
V_Rd,c	Punching shear resistance without punching reinforcement
d	Mean effective depth
u₁	Extent of the basic control perimeter
s_r	Radial spacing of the reinforcement perimeters
f_ywd,ef	250 + 0.25 d ≤ f_ywd
α	Angle between the punching reinforcement and the slab plane

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