QUESTION 4 As a product development Engineer at a local company, you have been asked to design a new thin-walled open section to be used as a column in residential construction. After numerous trials of various designs, you wish to pursue the design of the cross section as shown in Figure 4. Assume centreline dimensions in your calculations (Ix=1.47106mm4, wall thickness =3mm). a) Show that the flange force F3 is 0.0055V. ( 9 marks) b) If the other forces in the web and lips are given as follows, calculate the location of the shear centre S. F1=0.1V,F2=0.25V, (4 marks) Total (13 marks) QUESTION 4 As a product development Engineer at a local company, you have been asked to design a new thin-walled open section to be used as a column in residential construction. After numerous trials of various designs, you wish to pursue the design of the cross section as shown in Figure 4. Assume centreline dimensions in your calculations (Ix=1.47106mm4, wall thickness =3mm). a) Show that the flange force F3 is 0.0055V. ( 9 marks) b) If the other forces in the web and lips are given as follows, calculate the location of the shear centre S. F1=0.1V,F2=0.25V, (4 marks) Total (13 marks)