Based on structural calculations a designer has proposed a section for the loaded column as shown in figure $1,$ check the adequacy of this section to ACI Code requirements. Assume that self$-$weight can be neglected. Given: $f^{\text{'}}c=35$MPa and $fy=400$MPa.

The column shown in figure $2$ is reinforced with $32$ bars distributed around the perimeter. Find the load and moment capacity corresponding to a failure point with neutral axis $c=458mm$ from compression side. Given: $f^{\text{'}}c=35$MPa and $fy=420$MPa. Draw stress$-$strain diagram.

Using direct design moment calculate design moments for a typical interior panel of a flat plate slab system consists of $37$ panels each of $6m7m,$ with no edge beams. Given the following: interior columns are $40cm40cm,$ exterior columns are $30cm30cm,$ covering materials weigh $2\mathrm{.}29k\frac{N}{m^2},$ equivalent partition load $0\mathrm{.}55k\frac{N}{m^2}$ and the live load is $3k\frac{N}{m^2}.$ Use $f^{\text{'}}c=28$MPa and $fy=420$ MPa.

For the column loaded as shown in figure $3,$ calculate design moment $3.$ Assume $f^{\text{'}}c=28$MPa and fy $=400$MPa. Assume ${}_{dns}=0\mathrm{.}4.$

Figure $(1)$

Figure $(2)$

Figure$(3)$