Figure Q8 shows a symmetric cross-section of a I-type beam which is constructed from five metal plates each having a width of 12mm and the other sectional lengths are X=64mm, Y=48mm

and Z=20, where are the outer flange sections, the inner flange sections and the web section respectively. Calculate the second moment of area in units of mm4, stating your answer to the nearest whole number. X mm Y mm 12 mm Y mm X mm Z mm Figure Q8 12 mm 12 mm 12 mm 12 mm (5 marks)