Was he tied to the crane and is that his harness that falls after?Here's a GIF from the dash cam video above, slowed down to 1/8 speed.
Few observations:
- Yes, the failure began in the vicinity of the worker on the concrete canopy structure.
- It's entirely possible the top canopy was unable to sufficiently transfer the load back through the diagonal brace (which in the future was to be used with support cables back to tower structure). Punching shear or otherwise.
- It will be important to know what the worker was doing at the time. Marco Rubio posted on twitter that crews were tightening cables, but there's no way a person should be on the canopy during that process.
- The fall protection completely failed for the worker on the canopy. I hope he survived.
Originally, I was thinking it was more construction failure than design failure (jumping to conclusions on my half, of course), but now that I see this, I think we'll find it's not solely on one side or the other.
That's exactly what I thought. Of course it needs to be balanced to work. But in order to accelerate the project they did it backwards and you see the result. It's very common to place a support while building something like that. The fact that the striped area is there should have been a green light. To me it looks like they could add a left turn lane in the future hence the long span. Even if it was active take the lane anyway to support it.
It looks like a belt harness then which is illegal. Did he climb on the structure from the man lift over to the crane, that's what it looks like to me I don't see anyone with him. This tells me something was up if he was tied to the crane. He knew he shouldn't be there. That isn't common to tie to a crane.
This is a very cool video but my favorite part of the internet is still the incredible access to porn.
Thanks for sharing this. I didn’t really understand all of it but he’s very convincing.
As a non-engineer, it looks obvious that when the segment was moved without support directly under where the diagonal trusses meet the base, and without the horizontal supports that were supposed to go left to right betweeen the lifts underneath, that to much weight was transferred to the concrete spans that were not “stressed”at that time. The bridge segment suffered damage while being moved.
You and me both.
