Stand the front wall and align it with the marks on the floor.
Framing out an attic.
Shim under the bottom plate to level it if necessary then nail it into the floor joists with 16d nails.
Plumb the corners with a level and brace them with 2x4s.
It s got a 2x4 stringer running down the middle of the attic space on the floor as well that i d like to remove in order to have a flat subfloor all the way across.
If you want your attic space to have a flat ceiling you ll need to add collar ties to the framing.
Framing out an attic question.
The plywood will create a smooth strong ceiling without having to apply drywall tape and mud to the ceiling.
Install the lower header with joist hangers figure a and assemble the front wall on the attic floor.
This is the full view of the attic.