$(25$P$)$

Regarding the shear failure $($check only one$-$way shear$)$ for the given design of this $4m4m$ square concrete footing with a $1m1m$ square column:

a$)$ Calculate $V_{uc}$

b$)$ Calculate $V_{nc}$

c$)$ Determine whether the design is valid or not?

Given:

$*$The groundwater table is well below the bottom of the footing.

$**d_b=25mm$

Concrete $,$ C$30(f_c^{\text{'}}=30$MPa $)$

$**70mm$ of concrete cover is required.

$*$Resistance factor for shear, $=0\mathrm{.}85$