[meatloaf]

The type of construction and why it failed have been explained in previous threads. There’s nothing truly unique about the design. Something happened when the concrete bridge was in place and the interior tensioning cables were being adjusted possibly to prepare the bridge for further loading. Concrete takes about a month to cure to spec. My guess is that as the concrete continued to cure and develop more strength the tension on the cable was increased. It looks like they were preparing for addition of the remaining structure when something happened.

[dforest]

“somethings” have reasons and meanings. That is what I want to know.

[editor-surveyor]

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A concrete bridge that is “curing” usually has “falsework” below to support it.
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[AAABEST]

First reports I saw had a piece of equipment that was being lifted by a crane, fall onto the structure and cause the collapse. They even showed the snapped cable and the witness pointed out that it was in fact the very crane that caused the collapse.

Hadn't seen anything else on that.