I am trying to figure out what these two thin (1x4?) boards being used for in my attic. As you can see in the second picture, they are running parallel to the roof trusses, and on top of the interior wall I am planning on taking out. My first thought is that they are being used to support the ceiling drywall together where two pieces join? If so, what will happen if I remove the interior wall that is supporting these two boards. What can I do to prevent the drywall from falling?
These two boards run the entire length of the top plate, parallel to the wall and roof trusses.