The real question is, where is the central support pillar and suspension lines that were pictured in the conceptual drawing? There is no sign of them in the picture of the wreckage...
It appears they had decided that the bridge segment could self-support while the suspension was final rigged. From some things I have read on the threads the suspension system was being worked on when the collapse occurred.
I built a much simpler bridge that had it main segment swung into place over a main-line set of railroad tracks.
The “pick” was set Easter morning, in the rain, eight cranes, about 70 ironworkers and others, all on triple time.