Nathan Langley from Phillips-Langley & Associates sent me this photo, and I received a similar question a couple of weeks ago. The application is in a building where the floors are out of level, and the fire door frames are installed with one jamb flush with the floor, leaving the other jamb with a gap between the bottom of the frame and the floor.
What needs to happen here in order to make the frame code-compliant? How much of a gap is too much? Is there a type of caulk that would be acceptable?