Question #1: Design the steel column represented in Fig. 1, using the cross-section, steel grade and boundary condition as shown in the figure. With respect to the out-of-plane axis of the cross-section, all columns are fixed at one end and hinged at the other end. Loading is already factored for ULS. (a) IPE & S235 L3.6m Nani-1200KN Fig. 1 Design of compression Question #2 : Calculate the constant for uniform torsion Ir, and the warping constant l-, of the thin-walled steel cross-sections illustrated in Fig.2 150 24 10. 18 250 Fig. 2 Design of torsion Question #3 : Verify the safety of the cantilever beam AB, illustrated in Fig. 3, according to EC311. The beam, constituted by