Along the way some additions and improvements were in order. As you can see from the pictures below, I smashed up the floor, cut the original cast iron piping, and roughed in a bathroom as well as relocated the main floor drain, and added a gravity drain for the condensate and excess water from the a/c and humidifier in the furnace room (which wasn't built yet)...
Next I jacked up the house and replaced the rotten 4x4 and brick supports with proper steel teleposts. I also removed the 4x4 supports under the original basement stairs (they carried the load of about 6 floor joists from the kitchen) with a 2x6 supporting wall.
The images should explain the rest...
