Situation $13$: Given all the data shown in the figure below

As $=6-28mm,A^{\text{'}}s=4-28mm$

$f^{\text{'}}c=28$MPa, fy $=415$MPa, fyt $=275$MPa

Stirrups $=12mm,$ concrete cover $=40mm$

Compute for the required value of a if the minimum clear spacing of parallel

reinforcement is $25mm$

$25mm$

$53mm$

$56mm$

$39mm$

Compute for the nominal shear strength provided by the concrete using detailed formula

$215\mathrm{.}8kN$

$221\mathrm{.}0kN$

$205\mathrm{.}3kN$

$231\mathrm{.}6kN$

Compute for the design shear strength if lateral ties are spaced at $125mm$ at center

$365\mathrm{.}1kN$

$333\mathrm{.}5kN$

$324\mathrm{.}7kN$

$354\mathrm{.}6kN$