[1COUNTER-MORTER-68]

“Hey,,,How much SALT is used on that bridge in the winter ??...”
That would be a point if it were a deck failure, but I didn’t see anything that looked like a deck elongation happened.
~~~~~~~~~~~~~~
JMHO : This sounds more like rivet/iron failure the more info that comes out,,,
FYI : You could pull the whole deck off of that or any other bridge and the iron would still be standing,,,

Salt corrodes rivets...

[DAVEY CROCKETT]

Bridge Collapse in Minneapolis A truck driver just called in to the Royle James show and said that they spray calcium ?something? (maybe magnesium) on the highway up north to de-ice them.

This spray eats at the wiring under the trucks and that he had to have his truck washed everytime he came home to get the stuff off. Here it is this is my bet on the falling of the bridge.... it fell to even.

Primer on the Use of Magnesium Chloride as an Ice

http://www.snowplowing-contractors.com/mag_chloride.html

[editor-surveyor]

Salt on decks corrodes rebar in the deck. Drainage systems on bridge decks divert all storm water away from the structural elements. (but it does look like an upper chord failure, at a support bent. The weakest point on a cantilever is over the support bents)

[cleveland gop]

I had heard that part of the construction project involved a deicing system for the bridge surface.