This is interesting.
I was puzzled by the odd angling of the zigzag cross bracing in the bridge and once you see *why* they zig and zag like that, the reason it failed becomes a bit clearer.
In essence, the bridge is actually a cable-stayed design, but the deck
*should* have been strong enough to be self supporting until the support cables were installed.If you fast forward to 7:33 you can seen what the finished bridge should have looked like.
Tim