I have an arch way between the kitchen and dining room approx 82 3/4" wide with a half wall under it. I want to build some cabinets spanning that area approx 17 inches from the top of the half wall and approx 30 " down from the start of the arch. Am I attempting to span a too large of an area or is there any secret tricks to doing this. I was going to use 3/4" birch for the cabinet box and face it with 3/4" birch to re-enforce the fronts to prevent sagging.. anyone have any ideas..I could use the help before I tackle this... thanks
It must be the weather, but I'm having difficulty visualizing what you want to do. Is the arch like a pass-through? How high is the arch, how high is the half-height wall?
If you are looking for approval for installing unsupported upper cabinets the whole 80-some-odd inches, fastened only to each other, that might be hard to come by. Or maybe I have no concept what it is you are trying to do.
The only way I would install a run of unsupported cabinets over that span, would be if the cabinet was built as one unit, and it would require some serious hardware to fasten it to the walls on either side.