$(30$p$)$ Sekil $3\text{'}$de g$$r$$len ta$$y$$c$$ sistemin;

b$.$ AB kolonunu boyutland$$r$$n$$z$.$

c$.BC$ kiri$$ini boyutland$$n$$n$$z$.$

${}_{ma,c}=140$MPa,${}_{ma,b}=120$MPa,${}_{mx}=90$MPa,${}_{\text{z}\text{m}\text{a}\text{x}}=\frac{N_{\text{m}\text{a}\text{x}}}{A},=\frac{l_b}{i_{\text{m}\text{i}\text{n}}}$ P$1=40$Kn P$2=20$Kn P$3=80$ Kn