(Solved): 2. The sprial column shown below is subjected to a factored axial load \( P_{u}=1000 \mathrm{kips} ...

2. The sprial column shown below is subjected to a factored axial load \( P_{u}=1000 \mathrm{kips} \) and a clockwise moment \( M_{u}=400 \mathrm{kip}-\mathrm{ft} \). Concrete: \( f^{\prime}{ }_{c}=4,000 \mathrm{psi} \) Tension Steel: \( f_{y}=60,000 \mathrm{psi} \) a) Using the interaction diagrams find the required reinforcement ratio \( \left(\rho_{\mathrm{g}}\right) \) for the column. b) Compute the axial load capacity of the column assuming \( \rho_{g}=2 \% \). The column is not subjected to moments. Take the minimum eccentricity required by \( \mathrm{ACI} \) 318-19 into account when computing the axial load capacity.