A beam section is shown in the figure below. The beam is made with normal weight concrete

$($NWC$)$ with $f^{\text{'}}c=4000$ psi and $fy=60000$ psi and reinforced with $6$#$9$ bars. Take $b=16-$in and $h=$

$30-$in$.$

The effective depth $($d$)$ in inches is

$2\mathrm{.}5$

$25\mathrm{.}0$

$26\mathrm{.}25$

$27\mathrm{.}5$