Problem $2$:

$1-$ Construct manually the design interaction diagram for the column cross section shown in Figure $2.$

$2-$ Construct using the ACI$-$SP$-17$ program the design interaction diagram for the column cross section shown in Figure $2.$ Compare it with the diagram you constructed manually.

$3-$ If the column is subjected to an ultimate axial load of $400kN$ and an ultimate moment of $250kN.m,$ use your interaction diagram to check if the column is safe or not.

The material properties of the column are $f_c^{\text{'}}=30$MPa and $f_y=420$MPa.

Figure $2$