All of my exterior doors seem to have been built around a particular threshold, which I've been unable to replace possibly because I don't know waht the style is called. The doors open out and the threshold part steps down vertically with a rubber weatherstrip that the bottom of the door presses against when closed. There is a slightly sloped extension about 4" wide that extends out over the concrete step under the door. I can send a photo of the profile if that would help and exact measurements, but I think I just need to know what the profile is called so I can find them on the internet. Thanks!

I didn't know where to post this, but here goes: I am planning to put a door into an interior wall where there is currently a larger opening. The floor is a real wood floor, so the question I have is: Should I frame the new wall (surrounding new door frame) right on top of the wood floor (screwing through the wood floor and into the subfloor), or should I cut the space out of the floor for the new bottom plate and screw directly into the subfloor (leaving the finished wood floor to "breathe")? Thanks for any suggestions.