Example:

Check the two way shear action $($punching shear$)$ only around an interior column $(400500)mm$ in a flat plate floor of a span $(5\mathrm{.}65\mathrm{.}6)m.$ Find the area of vertical shear reinforcement if required. Assume $d=170mm.$ Total $q_{ii}=18\mathrm{.}0$kPa $($including slab weight$),f_o^{\text{'}}=30$MPa,$f_y=420$MPa