Q$5)$ Select a K$-$series open$-$web steel joist for the following conditions:

$-$ joists spaced at $3$ feet and spanning $28$ feet

$-$ Slab thickness $\backslash (=4\backslash )$ in$.($normal$-$weight concrete$)$

$-$ Weight of ceiling $\backslash (=7\backslash$mathrm$\{$psf$\}\backslash )$

$-$ Live load $\backslash (=60\backslash )$ psf

$-$ Partition load $\backslash (=20\backslash )$ psf

$-$ The maximum live load deflection cannot exceed L$/360.$