The 2X4s were to be used to screw handing pots and vines to, but they were installed vertically, by mistake. Once the foliage is grown in, you won't notice them, in fact, with the soil raising the plants up almost 2', much of that won't be visible, once the enclosure is finished. It's really frustrating to have vision and work with someone that doesn't see things through your minds eye. I have to have help, since I'm not such a confident handy man, though now, I could build this enclosure the way I imagines it, and give myself this 18" back. A simple frame, then framing out the top and sides with corner brackets and screwing them onto the main frame would have been simplicity in itself and how I thought things would be done, but sometimes you just take what you can get and move ahead with it.