MooseFET wrote:

Eeyore wrote:
Rich Grise wrote:
I tried to attach these, but apparently my newsclient or server choked on
2 MB of images. I got them from my brother, who lives in Minneapolis.

http://mysite.verizon.net/richgrise/...e/image020.jpg

One thing that struck me straight away is how flimsy the steelwork looks for the
job it's supposed to do.

The steelwork was more than strong enough for the job. It did have a
single point failure problem but that really doesn't seem to be what
really happened. The joints in the bridge froze up and didn't let
things expand and contract as they should. It is suggested that this
more or less jacked the bridge apart and over stress things causing
the failure. As with any arch, once things start ot go bad, they go
very bad very quickly.

You mean the expansion joints were locked solid ?

Graham