Originally Posted by
Koyote
It seems that we have two sets of respondents: those who see a mechanical problem, and those who see a metallurgical problem. The first group doesn’t seem to be addressing the second group...But if the second group is correct, they pretty much trump the first group.
If we concentrate on the one joint that failed, one can look at possible causes. A couple of posts down, the idea of a loose fitting post comes up (although I've wondered about it, and did notice the chunk of clamp on the post shows some squishing of the metal.
We don't know about the rest of the frame, and that isn't the issue at this point.