Partial Collapse of Building Under Construction 4

[bimr]

Two people were critically injured in a partial building collapse of a building under construction in suburban Chicago Illinois on Monday afternoon, December 28, 2020, Westmont village officials said. A spokesperson for the village said around 12:30 p.m. there was a partial collapse at a new multi-use condominium building under construction at the intersection of Cass Avenue and Quincy Street.

Quincy Station

Link

 

[dik]

to secure rebar, likely...

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[hokie66]

We get several reports per year of these precast monstrosities collapsing, either during construction or after. What we seldom get is a comprehensive report as to why. Perhaps because they are tied up in lawsuits, and settlements include keeping the reasons confidential.

 

[FacEngrPE]

This is an expansion of Bones reference to OSHA Data

on line with search engine

https://www.osha.gov/data

same data in flat file form

https://enforcedata.dol.gov/views/data_summary.php

This search will pull a list of fatality accidents involving collapses, most are either building or excavation collapses. The list is shorter than I expected, perhaps many collapses do not result in fatalities?

https://www.osha.gov/pls/imis/Accid...rtmonth=01&startday=09&startyear=2022&InspNr=

Fred

 

[ATSE]

To respectfully counter the comment: "...If done right, precast is great..."
This comment could be applied to almost any domain, like, "If flown right, the 737 Max has no problems." But most construction failures are a combination of designer and contractor frailties, and lack of anticipating what might go wrong when humans and randomness are involved.

Possibly a better question is, how likely is this system to exhibit construction problems (like partial or complete collapse) as compared to other structural systems.
Some designs seem to demand CJP welds on intersecting thick steel plates, but I avoid them because of the inherent problems, and the lower probability that the final construction will perform like my FEA; so instead, I bias my designs toward PJPs on thin steel plates.

 

[dik]

To reiterate, "If done right, precast is great..."

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[Tim Hart123]

Not Grout sleeves but threaded rod with nuts and washers. First thing I'd be looking for is anti roll clips bottom side of I T beams to the column to help prevent roll. Then we're the threaded rods tight? Sometimes temp support collums are needed under the loaded side of the I T until the load is balanced on both sides. I've been in precast for 36 years and we have only had a few times thing went wrong. Construction is an inheritantly dangerous business. That why we have limited access zones etc. Humans are not infallible. Don't judge precast to harshly its an amazingly versatile product.

 

[bones206]

I just noticed something in photos that were previously posted. It looks like icicles hanging from the plank bearing joint. If that whole length of joint was filled with ice, I could imagine that could cause significant movement/separation. Especially if it underwent several freeze/thaw cycles and the ice pack had chance to build up.