A cantilever beam of rectangular cross-section is welded to a support by means of two filled welds as shown in figure. A vertical load of $\text{2 kN}$ acts at free end of the beam.
Considering that the allowable shear stress in weld is $60\text{ N/mm}^{2}$, the minimum size (leg) of the weld required is _____________________ $\text{mm} (\textit{round off to one decimal place}$).