Given

Slab thickness $t=12\mathrm{.}5cm$

Concrete strength $f_c^{\text{'}}=210k\frac{g}{c}{m}^2$

Girder $G1$ is $4580m$

Concrete cover $4cm$

Main reinforcements Class SD$30$

Stirrups RB$9$ Class SR$24$

Uniform service LL $150k\frac{g}{m^2}$

Floor Finishing $120k\frac{g}{m^2}$

Design beams $B1$ and $B2,$ both having same size $0\mathrm{.}300\mathrm{.}50m^2,$ by WSD method. There is brick wall $180k\frac{g}{m^2}($Vertical area$)3m$ high along the perimeter of the building. Use working stress$-$design method.