What are these 2X4s nailed above this top plate (bathroom wall)
I was in a dark, dusty attic planning on how to run a wire to install a light fixture. I was hoping to drill thru the top plate on the wall and run the wire down between the drywall sections. But all along the top plate they had fixed 2X4s, narrow side down, so I would have had to drill thru 5 inches of wood instead of 1.5 inches I was hoping for.
My question is, why would they do something like this?