Hello! I have been given the job of designing a sewer culvert under an embankment, and have been given two pieces of information to work with, one is the distance of the culvert below ground level and the second is the vertical pressure acting on the culvert which is 500kn/m. I've been told to use Fadum's charts but the books are totally useless and the internet has nothing on it either! Can someone help me out please???