Consider a double$-$T$-$shaped cross$-$section with an overall width $b=134mm,$ an overall height $h=74mm,$ a flange thickness of $s=12\mathrm{.}0mm,$ and a web thickness of $t=6\mathrm{.}0mm.$ A concentrated load is acting at the left end of the flange in vertical direction, causing a twist of the cross$-$section. Determine the maximum value of this load in kN $($to $2$ decimal places$),$ if the maximum shear stress from torsion is limited to $=15\mathrm{.}5$ N$/$mm$^2.$