My 1901 home has "settled" about 4" on one end over the last century. I intend to re-level the house and pour a new foundation. To do it, I want to run new reinforcing "I" beams beneath the floor joists BUT, the joists were rough (VERY rough) cut so no two are exactly the same width. Where support beams were originally run, each joist was hand cut with what appears to have been an adze or similar tool. To run new beams, I need to cut a 6" wide spot on each joist to get an even depth on each of them. At about 60 feet, that is a lot of work doing each joist. Does anybody have an idea of how to do this quickly and accurately? Thank you.