Proportion a rectangular combined footing for the column data given below:

$\backslash$table$[[\backslash$table$[[$Column$],[$loads $($kN$)]],$DL$,$RLL$,$MLL$,$DL$+$ RLL$,$DL$+$MLL$],[\backslash$table$[[$A$],[($exterior$)]],800,230,380,1030,1180],[$B $($interior$),1000,360,760,1360,1760]]$

Given column spacing $=6m$

Allowable soil pressures for DL $+$ RLL $($reduced live load$),=150k\frac{N}{m^2}$

DL $+$ MLL $($maximum live load$)=225k\frac{N}{m^2}$

Footing not to extend more than $0\mathrm{.}4$ m from centre$-$line of column A$.$ Column sizes A: $350$ mm square, B: $450$ mm square. The footing is to be constructed at a depth of $3$ m from ground level.

Soil properties: c $=0,=33$

Standard Penetration resistance, $N=20,=18\mathrm{.}5k\frac{N}{m^3}$ Poisson's ratio, $=0\mathrm{.}3$

Young's modulus of soil, $E_s=15000$kPa; Assume $FS=3$ against Bearing Capacity failure.

Draw pressure diagram, shear force and bending moment diagram.