Question $1(10$ Points$)$

Design a round spiral column for the axial loads given. Include the design of spirals and a sketch of the cross section selected, including bar arrangements. All columns are assumed to be short. $PD=400$kip,$P_L=250$kip, and $$ initially assumed $=2\%$ and a cover of $1\mathrm{.}5$ inches. Use $f_c^{\text{'}}=4$ksi and $f_y=60$ksi.