Okay im not sure if this is going to make sense to you but please work with me. If i had a rectangular frame of t304 stainless steel 90 feet long and 102 inches wide with supports holding it off the ground at each corner and one support on each 90 foot side in the middle, so theyd be 45 feet in. There will be 2 I-beams also made of t304 connecting the frame from side to side, each one would be 30 feet in. If i were to place 140,000 lbs on the I-beams how thick would and wide would the frame and I-beams ahve to be. Ill try to get a rough picture posted try to show what im talking about thank you.