Janicholson said: (quoted from post at 20:43:42 10/28/09) Check out the Skywalk failure in Kansas city MO.
I was in the hotel 1 year later. The scars were evident.
Common syncronized human movement, and bad (on site) reengineering were the issue.
The steel support rods used to hang the walkways were supposed to be continuous top to bottom.
They were changed to use shorter rods that were in staggered holes in the steel cross supports. (rectangular tubing) the lower walkways were thus pulling down on the top of the upper tubing, and crushed it. The original rod design would transfrer the whole load to the roof trusses. JimN
My daughter worked as a draftsman (draftsperson?) for a company that bid the detail drawings for that job. They had a set of the original engineering drawings for the hotel, but did not get the detailing job. As soon as they heard on TV or the radio about the skywalk falling, they pulled the prints and had the problem nailed down before the day was over... she came home that evening and said it would be easier to do short rods from level to level, and they bet the contractor talked someone into changing it to short rods. That turned out to be the case.
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