1. The problem statement, all variables and given/known data Hi I am having tough time figuring out how to determine normal stresses σx, σy, σz using the flexure formula. All that confuses me is which moment to take for which σ. My for σx or Mz for σx and so on.. I will post an example question. In the question below, find the stresses σx, σy, σz at point H and point K 2. Relevant equations σ=Mc/I + P/A 3. The attempt at a solution The actual question is very big and requires determining principles planes, principle stress and stresses in different orientation to be found out which i know how to do as well. I can proceed with the question only if i can determine the stresses σx, σy, σz, which is were i am getting stuck in all such types of questions.