I'm trying to help my brother with a garage door opener installation. Normally this would be pretty straightforward, but his garage has a feature/obstacle I've never seen before. The door installer used a piece of angle iron as a support for the door spring. Unfortunately, it's in the same place where the opener's track is supposed to attach to the door header.
Why would the spring need a support like this? And how should we work around it when installing the opener?