How to fix a split joist for a Rock Solid floor

Alright guys, so I am building out a room in the basement of one of the rental properties I own. And as you can see behind me, I have a huge crack in one of the floor joists. What happened is, actually all three of these joists are notched improperly. And the reason that one is cracked is because the notch is so big. Today I'm going to fix it and sister all three of them. Let's get started. Got a big notch right here. Two smaller ones over here. Now, the notch led to this joist cracking, which is really weak in the floor. So I'm going to jack that up with a bottle jack right here. And I will sister all three joists to meet this support beam over there. So this jack closed that crack up real well. And I'm going to attach the other beam from this side. I took some work with the mallet and the chisel. As you'll see, there's cement right there to get it in. But I haven't even put nails in it and that thing is in there. Going to nail it up and make sure that this crack won't release. And this one will be good to go. Got all the joists complete. As you'll see here, I had to take down the concrete a little bit to get the full board in. Rock solid now.