The flange and web plates of the doubly symmetric built-up section are connected by continuous $10\:mm$ thick fillet welds as shown in figure (not drawn to the scale). The moment of inertia of the section about its principal axis $X-X$ is $7.73\times 10^6\:mm^4$ . The permissible shear stress in the fillet welds is $100\:N/mm^2$ . The design shear strength of the section is governed by the capacity of the fillet welds.
The maximum shear force (in $kN$ , round off to one decimal place ) that can be carried by the section, is ______.