$a_1=30,a_2=30,a_3=30,a_4=150,b_1=60,b_2=50$

$M_s=2032,M_{CC}=604,M_{fs}=564,M_v=1880$

For the defined cRoss$-$section and bending moments, calculate Section Geometric Properties and find the Stresses for each load case and phase respectively. Determine the required prestress Force and the required number of cables according to the provided data.

$\backslash$table$[[$Phase I$-$Prestressing,Phase II$-$exploitation$],[{}_{c,\text{a}\text{l}\text{l}\text{o}\text{w}\text{e}\text{d}}^c=19\mathrm{.}50$MPa,${}_{c,\text{a}\text{l}\text{l}\text{o}\text{w}\text{e}\text{d}}^c=16\mathrm{.}00$mPa