This second part of building the staging yard bench work will be to add the upper deck.
Side rails and cross braces for the upper deck were made from more 1-1/2 inch strips of plywood. The cross braces got 3/4 inch holes for wiring done on the drill press prior to installation. Openings were cut in the lower deck for access. Once the top is on the upper deck this box shape will give this section greater strength.
I'm a believer in sealing all bench work. Sometimes for a module bottom I use some left over paint from some other project. For this layout I found a light tan color in the bargain bin. Before installing the deck for the upper level I painted those areas that would be harder to reach with the deck on.
Here is the yard section outdoors with the upper deck added. I have left the entry end of the upper deck open as that part is still a bit unsettled as to the mounting of the turnout motors. I do almost all of the cutting and sanding outdoor to keep the train room clean.