 elwoodbluesElwood BluesPremium
join:2006-08-30
HarperLand | Elliot Lake Mall failure : An Engineering Perspective Interesting video showing what caused the mall roof to fail.
»www.youtube.com/watch?feature=pl···X3xA1QsY |
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 donoreoPremium
join:2002-05-30
North York, ON | Cool video. I watched without sound. |
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| reply to elwoodblues
Excellent video with actual pics and computer animation, lots of stuff I haven't seen before.
The whole thing came apart to a single failure of a weld. 
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cuius pocketa profunda, ejus liabilitas! |
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| said by Thane_Bitter:Excellent video with actual pics and computer animation, lots of stuff I haven't seen before.
The whole thing came apart to a single failure of a weld.
Not unsurprising, being that it was submerged in saltwater for 32 years. The deck even had cracks in the pavement where it was about to fail. |
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| reply to elwoodblues
I'm just happy the people I know who worked in that Mall all made it out safely.
I can't tell you the number of times I've made deliveries there for my dad. |
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peterboroAvatars are for posersPremium
join:2006-11-03
Peterborough, ON | reply to elwoodblues
I saw the vid on the news last night. As a welder in a previous lifetime I was interested in the culprit being a failed weld. I wouldn't have engineered the structure that way either. |
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| said by peterboro:... I wouldn't have engineered the structure that way either.
From reading the transcripts and exhibits, in the end, this is a typical complex failure, a number of errors and failures compounded to the end result.
The owner/builder chose an unproven, now prohibited method of waterproofing the parking deck / roof, that failed immediately. Multiple engineers made assumptions while designing the roof that later prevented anyone from properly fixing it (inadequate load capacity to replace the roofing system with something more conventional). The owners were reluctant to take drastic action (e.g., closing the parking). Later owners made repairs sporadically, and frequently aborted projects or switched contractors before they were finished. Consultants, engineers and experts throughout the structure's history failed to appreciate, or if they did, they failed to communicate to the owners, the magnitude of the danger to the steel structure posed by the leaking roof. Fireproofing on the steel, in large part, hid the true extent of the corrosion.
The transcripts and exhibits are all posted online and are a fascinating read, especially the forensic report: »www2.elliotlakeinquiry.ca/exhibi···0274.pdf
There will be a lot of blame to go around, in the end, I think. |
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 BonezXBasement DwellerPremium
join:2004-04-13
Canada | said by agtle:said by peterboro:... I wouldn't have engineered the structure that way either.
Consultants, engineers and experts throughout the structure's history failed to appreciate, or if they did, they failed to communicate to the owners, the magnitude of the danger to the steel structure posed by the leaking roof. Fireproofing on the steel, in large part, hid the true extent of the corrosion. or they told the owners, and that's why there was swapping of contractors.
people do it all the time with stuff that they shouldn't, cars, houses(holmes on homes comes to mind) |
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| said by BonezX:or they told the owners, and that's why there was swapping of contractors.
people do it all the time with stuff that they shouldn't, cars, houses(holmes on homes comes to mind)
Exactly - the witness scheduled for April 4th should be very interesting in that regard.
Another witness, not scheduled to testify, was interviewed extensively by the OPP, was employed by the owners in 2009 and predicted exactly where the failure was going to occur. He was fired for reporting it to the City and Fire Department. |
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BonezXBasement DwellerPremium
join:2004-04-13
Canada | sounds like the city is going to burn a bit for that as well, at least whoever handled the report. |
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 AnavSarcastic Llama? Naw, Just AcerbicPremium
join:2001-07-16
Dartmouth, NS
kudos:3 | reply to elwoodblues
Thanks for the link, excellent lesson learning video. |
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| reply to agtle
Where are the transcripts and exhibits are all posted online??? |
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| said by chabu:Where are the transcripts and exhibits are all posted online???
»elliotlakeinquiry.ca/ |
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| reply to elwoodblues
very good video. |
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It's a hard rock town. |
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| reply to elwoodblues
I've been reading the exhibits and right from the get go the thing was leaking. There are some very strongly worded letters to the Michigan company who engineered the roof from Algocen. |
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