Figure $1$ shows the gravitational loads $($i$.$e$.,$ deed load and live load$)$ that act on the slabs of

the Levels $N+4\mathrm{.}20m$ to $N+14\mathrm{.}70m$ of the PDI building. The plan shown on the next page

contains the plan view of the slabs at these levels and the identification of beams B$1$ and

B$2.$ The own weight of these beam sq$,$ is shown in Figure $2.$ With this data: $1)$ calculate the

acting loads on these two beams for the combination loed $1\mathrm{.}4$D$+1\mathrm{.}6$L for when the

building is already in use $($or operation$),2)$ draw the free body diagrams of the beams in

question, $3)$ draw the moment and shear diagrams, $4)$ determine the reactions.