Piece of parking garage collapses directly under fire truck, August 6 2019
what can be causes of this failure?
what can be causes of this failure?
Causes of failure of parking slab under fire truck load
- Thread starter Sumit Civil
- Start date
There cannot be several reasons for this failure, the one and only reason is " this driveway was not designed to take load of Fire tender " if it was designed to take the load which generally ranges from 40T+ then this failure wouldn't have occurred.
HockeyPuck
Active Member
This occurred in my hometown of Chicago! All I can say is Thank Goodness that there were no serious injuries and that everyone involved in the incident was able to go home their families after the event.....
At this early stage of the incident, I think it is best for all of us to let the investigation into the collapse run its course and inject too much speculation into it. Speculation, especially when it is made by individuals who do not possess experience & sound knowledge in a particular area, can lead to misunderstanding that can then lead to false narratives that cause nothing more than confusion. But at the same time, I think it is healthy for engineer's to use deductive reasoning in trying to determine what may/may not have been ingredients to a problem, and then let the formal analyses bear out the actual causes - This affords the engineer a chance to test his skills and knowledge to see if his/her solution was in-line with the actual issues.
So with that in mind, I think it's healthy to consider a few observations from the images provided by news agencies combined with some deductive engineering reasoning:
--Take a look at the structure that the truck was sitting atop of: It does not appear to be the garage structure but a vaulted slab adjacent to the garage (you can see the perimeter CIP concrete walls in the back of the collapsed area)
--Take a look at the broken roof slab concrete planks in the vaulted area - These are most-likely hollow-core type precast spandrel planks
--Take a look at the the location of the failure - It's right in the middle of the span
--Take a look at where the front wheels of the truck are relative to how many of the planks failed. It wasn't just one or two but numerous planks.
--Take a look at the bearing areas where the planks used to sit on the concrete vault walls: How large of a bearing area existed? Are the planks tied to the walls or are they held by gravity-load only? Did the planks fail mid-span or did they fail at the bearing areas?
I've included a news link - Check out the video, it will give you some additional perspective on the incident. I will monitor this event on behalf of the membership - As details about the causation bear out, I will post updates on this thread - Cheers!!!
www.firehouse.com
At this early stage of the incident, I think it is best for all of us to let the investigation into the collapse run its course and inject too much speculation into it. Speculation, especially when it is made by individuals who do not possess experience & sound knowledge in a particular area, can lead to misunderstanding that can then lead to false narratives that cause nothing more than confusion. But at the same time, I think it is healthy for engineer's to use deductive reasoning in trying to determine what may/may not have been ingredients to a problem, and then let the formal analyses bear out the actual causes - This affords the engineer a chance to test his skills and knowledge to see if his/her solution was in-line with the actual issues.
So with that in mind, I think it's healthy to consider a few observations from the images provided by news agencies combined with some deductive engineering reasoning:
--Take a look at the structure that the truck was sitting atop of: It does not appear to be the garage structure but a vaulted slab adjacent to the garage (you can see the perimeter CIP concrete walls in the back of the collapsed area)
--Take a look at the broken roof slab concrete planks in the vaulted area - These are most-likely hollow-core type precast spandrel planks
--Take a look at the the location of the failure - It's right in the middle of the span
--Take a look at where the front wheels of the truck are relative to how many of the planks failed. It wasn't just one or two but numerous planks.
--Take a look at the bearing areas where the planks used to sit on the concrete vault walls: How large of a bearing area existed? Are the planks tied to the walls or are they held by gravity-load only? Did the planks fail mid-span or did they fail at the bearing areas?
I've included a news link - Check out the video, it will give you some additional perspective on the incident. I will monitor this event on behalf of the membership - As details about the causation bear out, I will post updates on this thread - Cheers!!!
Parking Garage Collapses Under Chicago Fire Apparatus
A Chicago firefighter in Engine No. 126 was injured when a two-story parking garage partially collapsed, leaving the front of the apparatus teetering over the hole.
www.firehouse.com
Similar threads
