Building collapses at construction site in north Winnipeg
Building collapses at construction site in north Winnipeg
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All of the mandatory temporary/permanent truss bracing must have blown off during the collapse...

All of the mandatory temporary/permanent truss bracing must have blown off during the collapse...

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.





RE: Building collapses at construction site in north Winnipeg
Also there are unconfirmed reports that one gable end may have been a massive door essentially turning it into a 3 sided structure.
To be clear, I have no direct knowledge of the design nor the construction. It just happened about a 5 minute drive from my house. Drove by the night before and it was standing. The next day it was flat on the ground.
RE: Building collapses at construction site in north Winnipeg
RE: Building collapses at construction site in north Winnipeg
RE: Building collapses at construction site in north Winnipeg
Probably not going to be a second floor.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Building collapses at construction site in north Winnipeg
RE: Building collapses at construction site in north Winnipeg
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Building collapses at construction site in north Winnipeg
RE: Building collapses at construction site in north Winnipeg
RE: Building collapses at construction site in north Winnipeg
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: Building collapses at construction site in north Winnipeg
It was a rural hog confinement building that was getting framed up on a concrete foundation.
The framing was comprised of:
1. 2x8 wood studs @ 16" o.c.
2. A double 2x8 wood top plate
3. Premanufactured wood trusses @ 24" o.c.
4. Building was about 80 ft (truss span) by 300 ft + long.
What happened was that they completed the stud framing (no sheathing) and used 2x6 temporary diagonal braces up the sides of the studs with double headed nails into the edges of each stud.
They had the trusses 80% installed with diagonal 2x bracing on the tops of the trusses.
But when they left that night with 20% of the trusses still to go, a windstorm came up and blew the stud framing out of plumb by about 1 inch.
The next morning they found what happened and had all their men stand by the diagonal stud braces down the length of the building.
They brought a front end loader (or bulldozer - can't remember which) to the end of the building and tied two cables with two come-alongs to the top ends of the two long walls.
They then had all the men pull the double headed nails on the bracing - the idea was to then crank the come-alongs slowly to plumb up the studs - then have the men re-nail the braces.
However, as they brought the studs up to plumb they never figured that the tension on the cables would just keep pulling on the wall - the studs came up plumb - but then just kept coming.
All the men saw what was happening and jumped through the studs walls to the ground below as the whole assembly collapsed toward the front end loader.
They filed a claim with their insurance claiming that the wind blew it over.
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RE: Building collapses at construction site in north Winnipeg
Professional and Structural Engineer (ME, NH, MA)
American Concrete Industries
www.americanconcrete.com
RE: Building collapses at construction site in north Winnipeg
Are the wind loads higher on the open trusses then the sheathed trusses?
RE: Building collapses at construction site in north Winnipeg
No.
RE: Building collapses at construction site in north Winnipeg
Only what you see in the picture. I saw it under construction from the North perimeter. Truss Roof was being put together on the ground to be lifted by a crane in sections.
It looks to me like the walls failed as the back roof section simply lay down intact."