Overhead door

The automatic door in my garage started to get stuck when opening, so I fixed it on Sunday. It turned out that the bolts fastening the pieces of the overhead rail stripped themselves (unless the installer did it).

I wasn't happy to find that low grade bolts and nuts were used for such a critical connection. I got grade 8 bolts from ACE as a replacement. So, the makers of the door or the opener cheapened out. On the other hand, nobody was killed or injured. I cannot claim any kind of a safety issue.