I am building a screen porch that will be off of a small foyer. (see attached drawing) The screen porch is 16″ lower than the room that it’s accessed from. Because of the layout of the rooms, I want the french doors to open into the screen porch; onto the stairs. When the room is in use, the doors will always be open, but as it stands, I know it probably won’t pass inspection. I hope to remedy this by making a platform at the same level as the room and sufficiently wide that it give a person a place to “land” as they open the doors. The question is this: How wide does this need to be? Is there a code guideline?