The shelves for the corner unit are 96 inches long and about 42 inches deep.
These are the five shelves stacked on a work bench. The shelves have been notched to fit in the two front upright supports. The uprights are 1 1/2 inches wide x 4 inches thick. The corner cabinet is being built to hold a 70 inch flat screen TV.
On these first three pictures, the uprights have not been notched yet. The uprights will be notched so they fit into the shelves.
This picture is kind of hard to see, but the uprights have been notched to hold each individual shelf and so the upright fits into the notch on the shelf. Below is a picture of the uprights with the 45 degree bevel on the edge. That makes it so the upright runs in line with the side edge of the shelf and is flat at the front to line up with the edge trim on the front of the shelf.
The corner cabinet will be about 83 inches tall with room for the 70 inch TV, storage on the bottom of the TV and storage on the top of the TV.