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elwoodblues
Elwood Blues
Premium
join:2006-08-30
Somewhere in
kudos:2

1 recommendation

Elliot Lake Mall failure : An Engineering Perspective

Interesting video showing what caused the mall roof to fail.

»www.youtube.com/watch?feature=pl ··· X3xA1QsY


donoreo
Premium
join:2002-05-30
North York, ON
Cool video. I watched without sound.


Thane_Bitter
Inquire within
Premium
join:2005-01-20
Reviews:
·Bell Sympatico
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.
--
cuius pocketa profunda, ejus liabilitas!


Last Parade

join:2002-10-07
Port Colborne, ON
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.

ZombieBanner

join:2012-11-14
Chatham, ON
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.

peterboro
Avatars are for posers
Premium
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.

agtle

join:2013-03-09
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.


BonezX
Basement Dweller
Premium
join:2004-04-13
Canada
kudos:1
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)

agtle

join:2013-03-09
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.


BonezX
Basement Dweller
Premium
join:2004-04-13
Canada
kudos:1
sounds like the city is going to burn a bit for that as well, at least whoever handled the report.


Anav
Sarcastic Llama? Naw, Just Acerbic
Premium
join:2001-07-16
Dartmouth, NS
kudos:5
reply to elwoodblues
Thanks for the link, excellent lesson learning video.

chabu

join:2002-01-16
reply to agtle
Where are the transcripts and exhibits are all posted online???

agtle

join:2013-03-09
said by chabu:

Where are the transcripts and exhibits are all posted online???

»elliotlakeinquiry.ca/


franklyong
Cisco Geek

join:2004-12-05
Canada
kudos:1
reply to elwoodblues
very good video.


Rifleman
Premium
join:2004-02-09
p1a
reply to elwoodblues
It's a hard rock town.


Last Parade

join:2002-10-07
Port Colborne, ON
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.