Work on building with collapse was mo...

Work on building with collapse was months behind schedule

There are 26 comments on the KUSA Denver story from Jul 5, 2007, titled Work on building with collapse was months behind schedule. In it, KUSA Denver reports that:

VIEW SLIDESHOW GREENWOOD VILLAGE - " The multi-million high rise where a portion of a floor collapsed Thursday morning was at least six months behind schedule, records show.

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Concrete Guy

Kittredge, CO

#26 Jul 6, 2007
Denver wrote:
<quoted text>
I have been a highrise ironworker for over 30 years. I think I know what I'm talking about. The structural items failed to hold the concrete that was poured. What do you think holds up the concrete after the wood forms are removed? Moron.
30 years in the business, and you cannot recognize that this is NOT a steel frame
Concrete Guy

Kittredge, CO

#27 Jul 6, 2007
Pete and Tech are right. Take it from someone who does this kind of work (concrete frame buildings) this is a cast in place superstructure. The only steel in it Denver, is the reinforcing steel in the columns and deck. The concrete is place on formwork not steel pans. The concrete cures and the formwork is removed. I can tell you right now why it happened. If you look at the photos from this story you will see that...
1 - the top 2 storys had a taller ceiling height.
2 - the shores or posts that were supporting the formwork were sitting on wood blocking to extend their height. Which probably means they were extended to their max length. This makes the shores less stable.
3 - When pouring a deck like this, there is 'surge' forces from placing the concrete and mucking or moving it into position. This surge force probaly walked the shores of the wood blocking or collapsed one of the over extended shores.
Concrete Guy

Kittredge, CO

#28 Jul 6, 2007
Concrete Guy wrote:
<quoted text>
30 years in the business, and you cannot recognize that this is NOT a steel frame
Let me give you a little trick to recoginize steel frame structures...when you look at them you can see steel.

Omaha, NE

#29 Jul 6, 2007
Gee.. this story makes me want to go out and buy a piece of this place... NOT!
The Tech

Denver, CO

#30 Jul 6, 2007
Denver wrote:
<quoted text>
You're right. We're over-qualified to pour concrete. We're white.
Well guess what, Denver, I'm a white man as well. Your job is easy, a crane picks the steel and you bolt it on place, I can swing a wrench too. I just choose not to, I just so happen to control the quality of poured in place concrete.
Rebecca Roy 1013

Scottsdale, AZ

#31 Jul 6, 2007
Pete wrote:
The concrete, after cured, is the structure. The concrete is a post tension system and the post tension cables will be tensioned after the concrete reaches its required compressive strength. This is not a structural steel building, it's a cast-in-place concrete frame building.
Ah you forgot the steel inside the concrete, it needs to be there to keep the concrete strong or it will fall down in high winds or what have you.

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