St Louis building collapse

[Grizzly Bear]

For example:
The World Trade Center Seven is being constructed using a method called concrete core construction, in which the steel frame is set first and concrete is poured around the steel framework...

http://www.lincolnelectric.com/knowledge/articles/content/worldtrade.asp

The concrete encasement ensures much more efficient fire resistance, it doesn't really negate the effects of thermal expansion.

Kesha, thermal expansion isn't a new concept -- it wasn't then, it isn't now. The case for WTC 7 was a factor of its design which magnified the effects. I haven't read any of the code changes since that period but I would expect that any comment concerning this has been dealt with, as it should be when a design flaw is identified.

 

[mark4mark]

Ok, but this is obviously not based on NIST`s findings in August 2008, as the new WTC 7 has been planned way earlier.

As I`m working in a multi storey building: How much influence has Thermal Expansion here and now? I.e., what about all those old buildings? What measures will be taken?

Thx

NIST's findings in 08 didn't "discover" thermal expansion.

http://www.era.lib.ed.ac.uk/handle/1842/1216

 

[firecoins]

From your link,
xxx.ksdk.com/news/local/story.aspx?storyid=170428

"The cause of the fire is under investigation. Firefighters say demolition crews were working in the building when the fire started."

I don`t think this event should be widely quoted as an example, for obvious reasons.

From the article.

Heat had weakened the steel supports, and cork insulation in the walls helped the fire spread.

 

[Minadin]

That`s a quote in the original link.

Check yourself.

They were shutting down that building and moving equipment to a more modern facility across town. You could look at my previous posts for verification.

"Demolition Crew" doesn't have to mean people cutting columns and planting explosives, it might mean people disassembling equipment, cutting pipes, and removing partition walls to salvage some useable bits that the new owner of the property wouldn't want or need.

 

[Newtons Bit]

They were shutting down that building and moving equipment to a more modern facility across town. You could look at my previous posts for verification.

"Demolition Crew" doesn't have to mean people cutting columns and planting explosives, it might mean people disassembling equipment, cutting pipes, and removing partition walls to salvage some useable bits that the new owner of the property wouldn't want or need.

"Demolition" is the standard term used on construction documents for any removal of existing tenant improvements.

They could have been removing an old sink and they would be a "demolition crew". I don't know if news agencies would understand the different, however.