Well, people just plain didn't pay attention when the sign only said "Warning: this door leads directly to hard vacuum". "Fire" was deemed to be a more efficient deterrent, especially after the installation of flamethrowers connected to the handle.
Where should we think the set door
lies, in relation to this model? By conventional wisdom, it doesn't seem as if it could fit between the outer hull and the sides of the hangar... But note that the door is
at an angle to the corridor leading to it, much like the doors marked "ELEVATORS" are on the sides of the hangar model. Perhaps we could squint just
right and pretend that this indeed is the forwardmost of the "ELEVATORS" doors? (Peering through it, one should be able to see the shuttle, as indeed happens on occasion