Problem $1$

The structure shown in Fig. $1\mathrm{.}1$ is made with a steel bar that has a rectangular cross$-$section $5$ cm

tall and $10$ cm wide.

Fig $1\mathrm{.}1.$ Frame supporting point and distributed loads

Given the geometry, loads and supports in the structure draw the bending moment diagrams for

segments A$-$C and D$-$E of the structure. Then, use the diagrams to find the critical section and

calculate the maximum bending stress in segment AC$.$