A rectangular pretensioned concrete beam is to be designed to carry superimposed

dead and live loads of $300$ plf and $1,000$ plf$,$ respectively, on a $40-ft$ simple span.

Straight tendons will be used. Time$-$dependent losses will be approximately $16$

percent of the initial stress in the steel. Determine the concrete dimensions $($use

$h=2\mathrm{.}5b)$ and required prestress force and eccentricity, based on ACI limit stresses.

Concrete strength $f_c^{\text{'}}=5,000$ and $f_{ci}^{\text{'}}=4,000.$A rectangular pretensioned concrete beam is to be designed to carry superimposed

dead and live loads of $300$ plf and $1,000$ plf$,$ respectively, on a $40-ft$ simple span.

Straight tendons will be used. Time$-$dependent losses will be approximately $16$

percent of the initial stress in the steel. Determine the concrete dimensions $($use

$h=2\mathrm{.}5b)$ and required prestress force and eccentricity, based on ACI limit stresses.

Concrete strength $f_c^{\text{'}}=5,000$ and $f_{ci}^{\text{'}}=4,000.$