Q$3$:

Design a circular column to carry $1200$ kn dead load and $400$ kn live load

Use $1\mathrm{.}5\%$ as a steel to concrete ratio $($service loads$)$

$F^{\text{'}}c=22$mPa

$Fy=400$mPa

Q$4$:

Find axial load capacity and moment capacity for the rectangular column shown

$F^{\text{'}}C=28$mPa

$Fy=420$mPa

Cover to center of steel $=55mm$