This might be a very elementary question, but I haven't been able to find any information about it. We are planning to replace a sliding glass door between our dining room and deck with French doors. In order to have a door that we can use in the winter without sacrificing a huge amount of floor space in the dining room, I would like one side to swing in while the other side swings out.
I know this arrangement (double-egress doors) is used in commercial/institutional settings, to promote one-way traffic flow on either side (in the US, typically whichever door is on your right swings away from you). However, all of the examples I've seen of this arrangement are heavy, commercial/industrial-type, not French doors.
To be clear, I'm not assuming that I could have the doors open fully; I'm guessing that they would need a center mullion to close against, rather than closing against one another in the traditional French-door manner. Ideally, they'd be designed so both doors were in the same plane—something like this (obviously not to scale):
(Of course, if the center mullion were removable for the times when I need to fit an elephant through the doors, that would be great, but not required.)
Is there a reason why such an arrangement wouldn't work? If it would work, is it something that could be done by modifying stock doors and framing, or would everything need to be custom-designed/built?