Good question. That is where there will be 3, 36" doorways near the center of the walls. I believe a double plate and a good header above the doorways will be a good idea. I will see if I can find a render of the finished building.

Here is a walkthrough I created a while ago. https://www.mediafire.com/file/plt0uikn ... .mpeg/file The building is intended to be as close to ground level as possible to allow for handicapped access. It has changed a bit on the interior design with some additions and removals, other than that it is still the same footprint.