Problem:

The $1-$story structure shown below is made up of concrete slab that is supported by beams and girders on $4$ columns ate the corners. The roof is subjected to $20k\frac{N}{m^2}$ load from the slab, which includes the self weighgt of the slab. The unit weight of each beam and girder along its length is $5k\frac{N}{m}.$ Determine: $(1)$ the maximum shear in a typical interior beam $($say $CH),(2)$ the maximum shear in a typical exterior beam $($say EF$),(3)$ the maximum shear in a typical girder $($say AE$),$ and $(4)$ the maximum axial load at the top of a typical column $($say E$).$