In my basement, I have steel columns that are supporting my house; I can't determine if they are attached to the concrete floor or the beams. I would like to have them attached if they are not currently attached. How can I tell if they are attached?
The columns are about 4 1/2 inches in diameter. They sound hollow (i.e. not filled with concrete). On the top and bottom is a 6 inch square steel plate that in some instances appears welded to the column, but in other instances, appears markedly off center, although it is possibly still welded. I do not see any bolts nor holes to put bolts in place. The basement is unfinished. The house was built in 1978 in Atlanta.