$$ \text { Data: } \mathrm{W}=60 \mathrm{kN}, \text { Flange: } 75 \mathrm{mm} \times 12 \mathrm{mm}, \mathrm{Web} ; 100 \mathrm{mm} \times 15 \mathrm{mm} $$ ![enter image description here][1] $$ \begin{array}{l}{\mathrm{a}_{1}=15 \times 88=1320 \mathrm{mm}^{2}} \ {\mathrm{a}_{2}=72 \times 12=900 \mathrm{mm}^{2}} \ {\mathrm{a}_{1}+\mathrm{a}_{2}=1320+900=2220 \mathrm{mm}^{2}} \ {y_{1}=\frac{88}{2}=44 \mathrm{mm}} \ {y_{2}=88+\frac{12}{2}=94 \mathrm{mm}}\end{array} $$ $$ \begin{array}{l}{\overline{Y}_{\text …