A typical floor plan for a multi$-$storey steel frame building is shown in Figure $1.$ All the floor slabs are one$-$way spanning in the direction shown. All the joints are simple connections.

The floor load consists of a characteristic dead load of $2\mathrm{.}5k\frac{N}{m}2$ and a characteristic imposed load of $4\mathrm{.}5k\frac{N}{m}2.$

$ra)$Calculate the factored design floor load in $k\frac{N}{m}2.$

$($b$)$ Without performing any calculations, carefully draw the bending moment diagrams for beams CD$,$ KM & BJ

Figure $1$: Floor plate