The problem has been highlighted in the attached picture, it's an old exam paper question and I've been trying to do it in preparation for a university exam. I am confident in modelling the structure (into both shear panels and edge members), and confident that I am able to identify both the shear flow around each shear panel and the normal stresses in the edge members. I also believe the maximum end load stress equation is: Stress = (M.Y)/ Ixx = (force*length)/(depth_of_beam*contact_area) Shear stress within the panels = shear_flow/ thickness The issue I'm having is with the clamps on the panels, highlighted in the bottom right hand corner of the page. Although I believe I understand why the section P-P clamp is there, I can't decide if the Q-Q clamp is relevant to the question. Any help on this would be greatly appreciated.