Title: Steel & Concrete Question
Description: Steel & Concrete Distribution
Description: Steel & Concrete Distribution
psikeyhackr - December 14, 2007 01:16 AM (GMT)
The NIST report says there were "roughly 200,000 tons of steel" in the WTC. That is 100,000 tons per tower.
I cannot find a specification for the total amount of concrete in the NIST report. I have downloaded and searched it. Some sources say 425,000 cubic yards. My calculations indicate that should be about 280,000 tons per tower.
I do not think it is possible to design and construct a 1360 foot skyscraper without making some careful decisions about how much steel and how much concrete to put where in the building.
The plane hit the south tower at the 81st floor and it collapsed 56 minutes later. There had to be enough steel at that point to support 29 stories of the building. It manged to accomplish that task for 28 years. So why don't we have a table telling us the tons of steel and tons of concrete on every level of that building SIX YEARS after a 200 ton airliner supposedly accomplished this miracle of physics.
Why aren't EXPERTS even asking the question?
[doHTML]<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/z0kUICwO93Q&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/z0kUICwO93Q&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>[/doHTML]
http://www.youtube.com/watch?v=z0kUICwO93Q
psik
I cannot find a specification for the total amount of concrete in the NIST report. I have downloaded and searched it. Some sources say 425,000 cubic yards. My calculations indicate that should be about 280,000 tons per tower.
I do not think it is possible to design and construct a 1360 foot skyscraper without making some careful decisions about how much steel and how much concrete to put where in the building.
The plane hit the south tower at the 81st floor and it collapsed 56 minutes later. There had to be enough steel at that point to support 29 stories of the building. It manged to accomplish that task for 28 years. So why don't we have a table telling us the tons of steel and tons of concrete on every level of that building SIX YEARS after a 200 ton airliner supposedly accomplished this miracle of physics.
Why aren't EXPERTS even asking the question?
[doHTML]<object width="425" height="355"><param name="movie" value="http://www.youtube.com/v/z0kUICwO93Q&rel=1"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/z0kUICwO93Q&rel=1" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object>[/doHTML]
http://www.youtube.com/watch?v=z0kUICwO93Q
psik
lil - December 20, 2007 03:38 PM (GMT)
I contacted Richard Gage and he forwarded the question to one of his ae911truth colleagues Pete. Peter has responded for me to post here.
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| Cheri, Richard (obviously!) forwarded your inquiry to me and I have had the same question as you. A simple "Fact Sheet" on the Towers' physical features would be very helpful. Wish I had one to whip out for you but I don't. Please allow me some time and I will gather that data for you. One problem with the concrete estimate is that lightweight concrete (of that era) has a density of approx. 3 to 9 pounds per inch thickness per square foot and I cannot (yet) establish what density was specified at WTC. So, a 4" thick floor could have weighed as little as 12 or as much as 36 psf, for example. This probably explains the varying figures you've seen: the volume is pretty well known but its density is not, at least to my knowledge. However, I think we can arrive at a reasonable estimate in absence of a documented spec. The floors were just a place to put carpet and walk on, basically, so I assume they went as lightweight as possible but I do not like to publish assumptions. The firm I work for completed the largest continuous concrete pour in the history of Mexico earlier this month (6,000 cubic meters!) so I have daily access to concrete (and steel) experts - I am a mechanical engineer and I don't know steel & concrete like the structural folks. I have attached some fascinating material from the AISC steel code for your use. Note especially the discussion of the effects of fire on steel (I think you'll be stunned!). I'll be posting this material on 911blogger as well. Every steel designer would have had this book at their desk during design of WTC. Interestingly, this appendix is no longer included in later editions of the steel construction code. Thanks for your inquiry, I will get back to you, Peter Morse, P.E. |
he has attached 3 pdf files for us...I am not sure how to get them up on the site? I will work on that today. Good stuff all the way around. This group is truly doing everything they can and Richard and his staff have been more than generous with their time and research for me. More will be forthcoming.
Thank you Architects and Engineers for 911 Truth!
lil - December 22, 2007 03:57 PM (GMT)
okies, so Peter has sent me another email with another pdf file that actually has an answer to the concrete question...
how the helly do I get pdf files on here? :huh:
how the helly do I get pdf files on here? :huh:
lil - December 23, 2007 05:30 AM (GMT)
ok I am getting ready to upload the pdf files for you. Freedom Fight did find this though on another site...
lil - December 23, 2007 06:28 AM (GMT)
Here are four PDF files sent to me from Peter Morse, P.E. of ae911truth from Richard Gage...
Hope these help answer your questions...
Concrete
Weight and Building Materials
heat and steel 1
heat and steel 2
Thanks again Architects and Engineers for 911 Truth!!!
Hope these help answer your questions...
Concrete
Weight and Building Materials
heat and steel 1
heat and steel 2
Thanks again Architects and Engineers for 911 Truth!!!