Consider a double$-$T$-$shaped cross$-$section with an overall width b$=139$ mm$,$ an overall height h$=84$ mm$,$ a flange thickness of s$=11\mathrm{.}6$ mm$,$ and a web thickness of t$=7\mathrm{.}9$ mm$.$ 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 $=14\mathrm{.}2$ N$/$mm$2.$