The floor dimensions of the real building are up to the discretion of the teams. As an approximate range, you may consider about 2000 to 3000 square feet when deciding the layout of the internal floor plan. Include schematic drawings for whenever the layout of the floors changes. If you have a repetitive floor plan, simply label it with the floor levels it applies to. Teams may use their judgment to decide the number of schematic drawings needed to adequately convey their ideas.