Now that the corner of the house is more-or-less shored up, we can begin in the main floor.
We ripped the 2×10 20′ (6.096m) today. It is the longest rip I’ve ever done. Everything else has been 16′ (4.8768m). I had to buy 2x10s as the 2x8s in this house are 8 9/16″, and ordinary 2x8s are 8 1/4″. They would be either too short or not tall enough. (What?) What I mean is, it would either miss the subfloor above or the drywall below. So we rip.
The old floor joists in the original staircase location back when it was a 4-square house have been taken out. They were a mish-mash of pieces added as time went on. When we repaired the 2nd floor landing a few months back, we, yet again, pieced some pieces in. I regret that now. They should all have been replaced by real joists, ones that run the maximum span possible, from balloon stud to stair header.
I used a reciprocating saw to cut the old joists into pieces and wrenched them out with a goose-neck pry bar. It is mostly clear of joist pieces now. Just a few more pieces to go.
Can’t wait to get the new joists in. One 20′ will run alongside the existing one but on the other side of the balloon studs, and, once the two are the same elevation, blocking will be sandwiched in between the new and old joists.