The frame will be made out of 6" square tubing, 3/8" thick walls.. The rack will be 12' tall x 6' deep and 12' wide. There will be 3" x 3" 1/4" thk. angle iron that will hold each shelf. Each shelf will be roughly 5400 bounds.
Floor is 6" concrete.
I'm designing a steel rack to hold 45,000 lbs of steel sheets. For the life of me I can't remember how to figure out the load on each post and how to calculate size of base plate need for under each post.. Any help would be greatly appreciated. TIA..