Properties:

$f_c=3,000$ psi $($Normal Wt$.)$

$f_y=60,000$

Note:

Assume minimum and maximum steel limits are not violated

$3.(15$ points$)$ Calculate the reduced nominal moment capacity $M_n$ in $k-$ft of the beam.

$M_n=$ ft$-$kips

$(10$ points$)$ For the beam above, calculate the strain in the steel, ${}_t,$ when the concrete reaches maximum usable strain, ${}_{cu}.$

${}_t=$