Recently had an interesting problem at a local club in Seattle. Their door wouldn’t open all of the way. I determined that this metal plate was rubbing on the door, but the door wasn’t sagging and the doorframe was square. The only solution was that the plate must be higher than originally designed. Turns out that two decades of corrosion actually lifted the plate up quite a bit.
I had to hammer the rust off of this plate for about an hour before it sat flush on the ground.