Has anyone ('Merkins mostly, I guess) heard the term “tension rod” to refer to shower curtain and window curtain hanging rods? It’s bugged me just a little bit, because most all of the ones I see are compressed between the window sill or shower walls.
Have always called them tension rods, clear back in the 70s when I used one in my station wagon to keep crap from sliding around in the back. An engineer would probably call it a “spring-assisted self-supporting tension system”.
Maybe I just was never the guy shopping for shower rods, but I don’t recall hearing them called that. However, I have seen steel rods in bridges and “up in the steel” in factory buildings, that were clearly under tension.