$2-3.$ The floor system used in a hotel public room consists of a $6-$in$.$ stone concrete slab. Sketch the loading that acts along the joist $BF$ and side girder ABCDE. Set $a=12ft,b=30ft.$ HINT: See Tables $1\mathrm{.}2$ and $1\mathrm{.}4.$

$*2-4.$ Solve Prob. $2-3$ with $a=12ft,b=12ft.$

$2-5.$ Solve Prob. $2-3$@ with $a=12ft,b=18ft.$

Probs. $2-3/4/5$