Can stair landing space overlap door landing space?
I'm trying to design a set of stairs for an optional 2nd floor. To get the stairs to fit as I like, the required bottom landing area crosses in front of an opening (technically a jamb without a door) into a hallway. Another stair alternative I have would have the bottom landing passing in front of the non-operating side of a sliding glass door.
Are either, both, or none of these conditions legal? Or must the landing area be 100% dedicated to the role of stair landing?