A built-up I-section steel beam with channels attached to the flanges (see Figure Q2 part a) is simply supported at the ends. Two equal and oppositely directed bending moments 0 act at the ends of the beam, so the beam is in pure bending. The moments act in plane m-m, which is oriented at an angle to the x-y plane. (a) Determine the orientation of the neutral axis and calculate the maximum tensile stress due to the moment 0
