Wow, this is just sad

Very Sad. Did you see this happen? were you on the job? This should of never happen for sure.

Looks like a monolithic pour.   I think they should form it all, rebar the beams, pour them, then rebar the deck and after the beams have gained some strength, say - 4 - 7 days, pour the deck.  the beams  can pick up some of the strain.  In all likelihood, this would require different engineering as it isn't monolithic and the forces of tension and compression would be different.  But it looks like they had the roadway open beneath, that likely contributed to the disaster - not enough support over the span.  Perhaps the rate of pour was too fast on one side versus the other, creating a twisting action.   Whatever the reason, this is something that cannot simply be 'good enough', we don't have time or budget for anything else...

Very hard to even look at these pictures. We all know how fast this can happen.

Prayers to the families.

I would dare to say , if traffic was open underneath the supports or lack of under travel lanes would probably be the cause, I never liked the idea of pedestrian traffic under such pours, when catastrophic things happen, innocent people get hurt or die, prayers go out to all families affected by this tradgedy.

"pre-cast Beams" only way to go!

yep !!!

Respect to the people lost and their families         Respect to the EMS/paramedics who work so diligently in unfathomable circumstances