Question$(2)$:

$(20$ marks$)$

The following design data belong to a rect angular combined footing that supports two columns. The columns

loads and dimensions are shown in Figure $(2).$ The gross allowable soil pressure $1\mathrm{.}250$KPa at a depth of $1\mathrm{.}30m$

below the finished basement floor. The basement concrete floor is $0\mathrm{.}15m$ thick and supports a live load of

$5\mathrm{.}00$KPa. The density of the fill above the footing is ${}_s=20K\frac{N}{m^3}.$ Footing: concrete strength $f_c=21$MPa;

reinforcing steel $f_y=420$MPa.

Design the footing with full details $($dimensions and reinforcement$).$

Figure $(2).$ The columns loads and dimensions of question$(2)$