According to the associated press, the bridge that collapsed in Miami Florida and injured many people did not sustain its own weight.
The bridge was designed to withstand a category five hurricane and durability to last a 100 hundred years. It was the first bridge in the world to be constructed entirely of self-cleaning concrete. It’s made of titanium dioxide which, when exposed to sunlight, it would capture pollutant particles from the air and cleans its own concrete surfaces.
It was installed in just a few hours, on Saturday, March 10, 2018, and although its construction wasn’t finished.
The main span was built to avoid interruption and using a state-of-the-art computer-controlled system that carried and set the 950-ton section and a 40 foot-wide pedestrian. It’s called Self-Propelled Modular Transportation, and this was the largest pedestrian bridge in the US history to be moved using this method.
However, there was a designed flaw. There was no support beam underneath the bridge. They have it on the two side but not in the middle. If they have it in the middle of the bridge inside the bridge itself, then it would be okay. There will be an ongoing investigation of the bridge.