The distance a door is allowed to encroach into a hallway/corridor/exit way or path of travel out of the building. If a door opens on to a required exit width this video talks to how much it’s allowed to encroach. 7 inches is the max when the door is in its fully open position that it’s allowed to encroach. Otherwise if the door opens 180° the radius in which it opens that radius cannot encroach more than one half during that swing.
It doesn't have to be a Puzzle
