There are quite a few buildings in Manhattan that have metal door frames in some or all of the apartment. We recently had a client that was looking to remove a metal doorframe in their UWS apartment and before it came out, we had to do some minor removal of the surrounding floor boards. This was an older apartment (20's), but we've also worked in apartment from the 70's where the customer was having the metal door frame removed and we had to do some floor repair/finishing around the lower edge of the frame. The videos show the actual cutting of the floor and removing of the marble saddle. We make cuts straight down into the wood (plunge cuts) with a tool called a Multi Master which is made by Fein. These are some more pictures and videos of the board removal process:
After all the boards have been removed and the opening has been closed up, we then went ahead and repaired the floor with new white oak. Depending on how close a match you're looking for, new wood may not be the best route to go as the graining and color may be too big a mismatch. The new wood may also not take the stain well. If this is the case, we'll typically try to salvage from a closet or another floor that might be getting ripped up so that we know the wood will be a match. In this case, the doorframe was being closed up and some of the repaired boards were going to be covered with base molding, so new wood worked out fine. There are some more pictures of the repaired wood and then the finished product so you can see what to expect from repairs like this after the refinishing has been done.