wrote
I cannot give you any reference, but I just suspect something that
looks like a door but acts like a blanket might not be considered
safe. I should have said I DOUBT they meet code. I sure wouldn't want
to have them - better by far no door at all so everyone KNOWS it is a
hole.


Thanks for the clarification on your OPINION, rather than facts. As for
acting like a blanket, you can buy them made from vinyl, wood, aluminum, and
in varying thickness. Some are fire rated. Have you looked at any
recently?