Prohlen $1234$ A rectangular concrete beam has $f_c^{\text{'}}=30\mathrm{.}10$ and stecl with $f,=40$ksi. Select the beam dimensions and reinforcement for a balanced section if the beam sustains a moment due to dead load of $60$kip$-ft$ and a moment due to live load of $90$ kip$-h.$

$412$

RENFORCED CONCRETE STRUCTL

TABLE $13\mathrm{.}3$ Minimum Required Tension Reinforcement for Rectangular Sections"

$\backslash$table$[[f_{,(psi)},{}_{-40\text{k}\text{s}\text{i}},f_{,}-60$ksi