Ongoing home refit, the ideas continue...

I looked over the joists in my first floor this weekend and there's a few things to take into account.

1. The western beam is broken at the chimney. Instead of one solid beam all the way across, there are two shorter beams each resting on the chimney as a brick post. I don't want that as I intend to remove the chimney and rebuild it and thus I would need at least two columns on either side to take its place. If I look down between the chimney and the attic floor, nothing is making contact with the chimney above that point. Open shot straight up.
2. There are several joists over the southwest section broken just before the southwestern beam. If I had to put money down, I'd almost be certain there used to be a stairway there many decades ago and the floors redone to eliminate it.
3. The breakpoint of the joists of the southeast for the present stairway is not done as I would prefer. Since stairwells tend to have upwardly contiguous wall plans, you want a corner of the stairwell rectangle supported under the beams.
4. The bowing of the floors is as expected uneven and in odd places not in the exact center of the floor making straightening them a little harder.

So here's what needs to be done:

1. The western beam needs two columns, one either side of the chimney pillar, and furthermore should have a 2x12 beam sistered to it on the side facing out to prevent lateral deflection of any kind, even though the dead weight on it from above pretty much rules it out.
2. The joists that are broken are unfortunately meeting at a block going across their ends and continue from there on the other side with short sections. This pretty much prevents proper sistering as if that cross section is removed, there's a two inch gap to cross and sistering will be of little use unless the sister beam is essentially bonded like a composite with glue and bolted on top of it and even then it is questionable. I will probably put a section of double 2x12 beams across on columns underneath that point permanently.
3. The rear stairwell needs to be better supported and that taken into account when doing the jacking.
4. I have to clear a lot more of the cellar to get the whole process started.

That's just the first floor, not the second, which will have to wait until the first is taken care of and totally ready. Mind you, all this needs to be done while I am still living there with my family and pets. NOT unoccupied. To say nothing of redoing the outside of the house.