Hello all, New here. Hopefully I'm following the guidelines by posting here. So, I am in need of some help in analyzing a stand that I am designing. It has an unusual arch in the middle supported by four members; together they make a tire stand. My tire is 40inches in width. And the stand will be holding 5000 pounds, so I'm using 80 ksi steel as a result. I am unsure as to where to begin my stress analysis, so that I know the thickness and appropriate dimensions I need to use. I am attaching the image of my design. I appreciate in advance to folks that are willing to help.