There is no need to brace the unit because it sits in the window just fimne and the winow in mine comes down on top of it and holds it in place. When i move I simply raise the window and remove the unit to the inside of my fifth wheel and put it on the floor to travel. It takes 2 minutes to put it in place and less time to remove it. There is no driving with it and it is a temporary installation in very warm weather.