[JRTJH]

The front wall is built with horizontal studding so it can conform to the airfoil of the trailer's forward curve. The rear wall is vertical, flat and doesn't bend or curve like the front wall. It is built with vertical studding with cutouts (boxes) built in the studding for any openings that are required. You can see the refrigerator vent cutouts and the interior luan in the picture I posted.

Thanks ShacterShack, for posting the front wall picture. As you can see, there's a substantial difference in form and a very different way of "forming" the radius of the front wall vs the "slab" shape of the rear wall.