Review from Feedback

To help with my understanding of the ramp in SECTION.
I did a physical model of the structure and drew over it in paint to show I understood where the cut lines were.

With this diagram above and looking at my floor plan 'cut' lines, I was able to understand the part that was a section (red box), the dotted slope (which wasn't curved, but straight) that wouldn't be seen with the section marker the direction it was. However, my main difficulty was understanding what happened with the floor line on the second floor. You said it would just be a wall, so therefore no thickness - have I presented this correctly?

 When you said 'ground' floors do not have foundations - wouldn't it need a retaining wall for the earth that surrounds it? Would I just do a line thickness of 300 without the foundation? Would I copy what I have used between the two floors (circled in red below)? I definitly don't need any other foundation?

These are my floor plans - both with stairs and ramps marked.