For the column shown below, draw the P$-$M interaction diagram $(P_n$ vs $\{$:$M_n)$ with respect to the

bending axis shown. Use at least the four points in $($a$)$ through $($d$).$ Calculate by hand.

a$)$ Pure Compression, $P_0$

b$)$ Balanced Point, $M_b,P_b$

c$)$ Tension$-$Controlled Limit

d$)$ Pure Tension, $T_0$

$f_c^{\text{'}}=6000$

$f_y=60$ksi

$(10)$#$9$ bars

The centroids of the outermost bars are

located $2\mathrm{.}5$ in$.$ from the column edges.

Intermediate bars are equally spaced.