(Solved): A beam has the section shown, where d=215mm,b=70mm,t= 35.0mm, and w=17.0mm. The two boards ...

A beam has the section shown, where $d=215\mathrm{mm},b=70\mathrm{mm},\mathrm{t}=$ $35.0\mathrm{mm}$, and $w=17.0\mathrm{mm}$. The two boards are fastened together with nails having a resistance of $F=1.8$ kN each. The beam is subjected to a maximum shear force of $V=2.4\mathrm{kN}$. Determine the maximum allowable spacing of the nails required to keep the boards fastened together.