Screwing in picture rails to studs so we can hang heavy pictures?
Let me start by saying that I have an 1850s house with plaster walls. I have a heavy mirror I'd like to hang on a certain wall but unfortunately there is no wall stud anywhere near where the mirror needs to go. I wanted to (re)add picture rails in this particular room anyway, so I was thinking that instead of using finishing nails to mount the picture rail, I could screw the rail into the studs and then hang my heavy mirror from the rail. All the moldings in my home are quite wide, so the picture rail would be substantial, at least 2 inches wide.
My question: is this a feasible idea (or possibly the reason picture rails were used in the first place)?