That could make sense, as it may have started out on the porch, rather than under it. I’m sorry the photo isn’t adequate to show more angles. This is my first posting of an item
Figured it out-we went to Brimfield yesterday, and saw something just like it, without all of the rust. It is part of a barn door roller. I wonder what it was doing under my porch, though...
I have seen similar type door rollers .They come in different sizes .There might have been a rolling door on the house somewhere .Or it came from an out building and was thrown under the porch after it was damaged