Total Building Collapse from a Single Column Failure

To say that the girder between column 76 and 79 was restrained would be a massive understatement. Even discounting the support that column 79 had from elsewhere, to suppose that it was pushed to the east by this element gives the NIST hypothesis even more problems.

Ahem. The support it had from elsewhere in its pristine, as-built condition. Or did you already forget that the building was on fire?
 
To say that the girder between column 76 and 79 was restrained would be a massive understatement. Even discounting the support that column 79 had from elsewhere, to suppose that it was pushed to the east by this element gives the NIST hypothesis even more problems.

Your disbelief counts for nothing. For this and other system issues, you are going to have to create a simulation and include fire heating to investigate the question.

Remember that word, system.

Learn it. Live it. Love it.
 
Ahem. The support it had from elsewhere in its pristine, as-built condition. Or did you already forget that the building was on fire?
Good point. The fact that these beams and girders would have been subjected to the fires would cause the girder between C79 and C44 to expand in toward the face of column 79. If I were in the sorry position of trying to defend the NIST report, I don't think this would be a road I would choose to go down. It results in more questions than answers. I would like to see an analysis that would cause 79 to move to the East.
 
Your disbelief counts for nothing.
False. That depends what evidence that my disbelief stems from. Unlike defenders of the NIST report such as yourself, my belief is not faith based.
For this and other system issues, you are going to have to create a simulation and include fire heating to investigate the question.
Good idea. You should be asking NIST to do the same kind of analysis and to include the elements that they missed in their first one.

Remember that word, system.

Learn it. Live it. Love it.
I will do my best to. Thanks for the advice. I will maybe write the word on my hand or something in case I forget it.
 
False. That depends what evidence that my disbelief stems from. Unlike defenders of the NIST report such as yourself, my belief is not faith based.

Good idea. You should be asking NIST to do the same kind of analysis and to include the elements that they missed in their first one.


I will do my best to. Thanks for the advice. I will maybe write the word on my hand or something in case I forget it.


Just remember to stick to the gameplan
 
Your disbelief counts for nothing. For this and other system issues, you are going to have to create a simulation and include fire heating to investigate the question.

Remember that word, system.

Learn it. Live it. Love it.

The "NIST is wrong because I say so" argument.
That has gotten troofers far. :eek:
 
And actually making a point is not yours apparently.

I made a point. You are wrong about my relationship to the NIST report, and how I go about deciding the validity of claims. I have a high standard of proof - and it's part of my training and profession to be so. I also am not uncritical of NIST.

On the other hand, a failure to approach the problem from a systemic viewpoint leaves the discussion dwelling on irrelevant minutiae. I don't see any action taken to address this.

ETA: well, let's call it barely relevant. and not irrelevant.
 
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If I were in the sorry position of trying to defend the NIST report....................... .

There's no need to defend it because no one is challenging it. Unless of course you consider posting on obscure internet forums a serious engineering challenge.

You really need to include the engineering world if you want your challenge to be taken seriously.
 
I made a point. You are wrong about my relationship to the NIST report, and how I go about deciding the validity of claims. I have a high standard of proof - and it's part of my training and profession to be so. I also am not uncritical of NIST.

On the other hand, a failure to approach the problem from a systemic viewpoint leaves the discussion dwelling on irrelevant minutiae. I don't see any action taken to address this.

ETA: well, let's call it barely relevant. and not irrelevant.
(my bolding)
How exactly did you judge the relevance of the omissions and errors that are highlighted in the complaint. Have you quantified just what difference they make to NISTs conclusions, or do they just "seem" like they might not matter?
 
There's no need to defend it because no one is challenging it. Unless of course you consider posting on obscure internet forums a serious engineering challenge.
The NIST report is being challenged at the appropriate level, but even if it were not, the truth is the truth regardless of the venue. I do agree with you that no-one on this forum is mounting a serious defense of the NIST collapse initiation hypothesis.

You really need to include the engineering world if you want your challenge to be taken seriously.
Let's just concentrate on what is being said on this forum for now, rather than supposing where else the issue is or isn't being raised.
 
To say that the girder between column 76 and 79 was restrained would be a massive understatement. Even discounting the support that column 79 had from elsewhere, to suppose that it was pushed to the east by this element gives the NIST hypothesis even more problems.

Do you understand geometry/trigonometry/vectors, gerrycan? The answer to your question about "restrained" is right there in the diagram.
 
Let's just concentrate on what is being said on this forum for now.............................

That's exactly where it will remain forever. You have nothing they will listen to and you know it. This is the best you got.

I know, it's all bluster from me. Prove me wrong (you won't). :rolleyes:
 
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Do you understand geometry/trigonometry/vectors, gerrycan? The answer to your question about "restrained" is right there in the diagram.
You mean the E12/13 floor plan I presume.
Feel free to make your point about the geometry etc and I will let you know if it is over my head or not.
 
That's exactly where it will remain forever. You have nothing they will listen to and you know it. This is the best you got.

I know, it's all bluster from me. Prove me wrong (you won't). :rolleyes:

There are those in your administration who realise that there are pertinent questions that require an answer from NIST about their WTC7 report. That the errors and omissions exist is not really something that is up for debate here. The extent to which they are relevant to NISTs conclusions is though, and this is something that should be demonstrated by accurate analysis. NIST have not produced an accurate analysis to date re WTC7.
 

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