Problem $5$

The floor system used in a school classroom. The live load is $0\mathrm{.}4\frac{k}{f}{t}^2$ and the slab is $4-$in

reinforced stone concrete $($i$.$e$.,$ weight density $=0\mathrm{.}15\frac{k}{f}{t}^3).$ Using loading combination, $1\mathrm{.}4D+$

$1\mathrm{.}6L,$ sketch the loading that acts along the joist $BF$ and side girder ABCDE for the two cases:

$(1)a=10ft,b=30ft.$

$(2)a=10ft,b=15ft.$