The reporting is very misleading. As I read it what was innovative was use of Self Propelled Modular Transport. This was simply placement of a span cast (in this case) beside the roadway instead of over it to reduce danger during construction and simplify the construction of the concrete span.Mobile heavy lift units then placed the completed span on its permanent supports (apparently last Saturday).
Looking at the pictures I would guess either failure of the anchors on the prestressing cables in the unit, bad design, substandard concrete or bad placement of the concrete (insufficient vibration?)any of these possible especially with the widespread use of illegal labor in the industry in So. Florida.
Yes. That has been done on roads and bridges here in Minneapolis. Either a design flaw or some engineer was way off is my guess. I do work on government projects all the time. You don’t pour concrete without a private testing agency on site taking samples from every truck wether it is a five yard pour or 5000 yard. And you don’t pour until the holes and rebar have been inspected.
But as they say...Ho Lee Fuk. Sum Ting Wong.