LittleInch,
The truss you refer to is called a cross-fame, used for lateral stability during construction and to account for lateral load transfer such as wind between the girders. Also, if the top flange was unbraced (non-composite), it would provide top flange bracing in the final condition...
Sounds like we'll need to bring the liquidators out of retirement to fight these fires, if there are any left. Have the helicopters with hoppers of boron and concrete at the ready.
IC
How did you get their calc. package? Is it available publicly or was it provided for formal review? Or behind the scenes from the contractor your boss knows?
At an absolute bare minimum, and I'm not sure you should even be involved, if you choose to take action a first step would be to...
From Figg's party submission to the NTSB relating the events on the morning of the collapse, their own words:
"Figg left the site to return to Tallahassee to develop a way to enhance the north end truss member connection at this stage of construction."
Why? If all was well and good and no one...
"it was being MISUSED; the driver is either inattentive a little, or enough to not even be looking at anything car-related. "
That brings us full-circle. In the 6000+ ped deaths cited above, exactly zero would have occurred if one or both parties were just carefully paying attention in the...
Concur with saikee119...
The bridge was screaming for help and to some extent the presentation acknowledges that.
In an instance like this with large and growing cracks at a critical location that you can not replicate with analysis, as the EOR, you have to convince yourself it is not OK until...
https://www.miamiherald.com/news/local/community/miami-dade/article230079344.html
More news, looking now for the 44 page document referenced in the article.
IC
I can't imagine it is intentional. There is tremendous axial force in the deck/superstructure from the horizontal component of the stay forces. Not having that force in a linear plane would cause immense localized stress at each lower anchorage that was vertically offset from a subsequent one...
epoxybot,
Are you the mayor, chief engineer, attorney general, chief of police and head librarian for San Francisco by chance? Star for you again.
Concerning crack for certain, looks like stiffener/web/flange interface origination as HotRod10 speculated.
IC
.....and why didn't the flight engineer on KLM 4805 speak up? why were they running a low-power non-standard test on unit 4? how did water get into a methyl isocyanate tank? clearly the o-ring was bad, Eastern Flight 401.................
History is littered with the victims of tragedies due to...
My text got cut off. Article on a study to look at the stays. So, they had already retrofitted the east span stays, had a report stating there was an "anomaly" in the subject span, and were working on a fix of some sort apparently. This is looking FIUish to some extent.
IC
