Problem $3(40$ pts$)$

For a $5-$ft long cantilever beam shown below, check whether the longitudinal reinforcement $(A_s)$ is

long enough to prevent bond failure, in other words, check if the development length $(l_d)$ is smaller

than the embedded length of the tension bars $(l).$ Use one of the equations in ACI Table $25\mathrm{.}4\mathrm{.}2\mathrm{.}3.$

The beam is made of Grade $60$ reinforcing bars and normal weight concrete with $f_c=4000$ psi.