A couple of people on the bulletin board asked me what I thought about the Minneapolis bridge collapse and what caused it. I wrote the following, which provides very little insight, but I haven’t posted anything on the blog in a while. We were kidding on vacation that I would need to get back to help fix the bridge, but I was at least able to scan the documents I mentioned below which were requested by the investigators. Every bridge collapse causes engineers to change how we do our work, and this won’t be any different even though it isn’t known what caused the problem yet.
Here’s what I wrote about why the bridge fell: