How to build exterior walls directly on stem walls without a floor
I’m seeking some advice/guidance on how best to build exterior walls without the ability to build it on a floor or ‘stand it up.’ The property is tight and there’s no surface to build a wall (in, say a backyard), and move it onto the stem wall.
I’m mostly working alone with the help of friends for days that require extra sets of hands.
More context: I’m renovating an old house and adding to it. The hold house had no crawl or foundation (rotten/eaten wood on bricks), and so I’ve removed the old floor system, excavated a bunch of dirt, poured new foundation under the old house walls, and made way for a new slab to be poured under the old house. The new (heated) slab will become the finished floor surface.
Because I’m also adding to the footprint of the house, I’ve been advised to wait to pour the interior slab until it all can be under roof and in one continuous pour. In order to do that means that the addition will need to be framed without a solid floor surface—building straight up off of the stem walls.
I would welcome any advice on how best to accomplish this. I’m curious about what techniques I might use to make sure it’s level and straight. I haven’t found much out there on the internet about framing in this type of situation—or maybe I’m not searching for the right thing.
Included a drawing of the 1st floor framing atop the stem walls of the addition.