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Invitation to Derek Johnson to discuss his ideas

And the "window of opportunity" for comments was open for how long?
What difference does it make? It could have been open for 100 years and you lot would still whine about it.

If you don't like it, publish superior findings. The statute of limitations on science is forever. You can challenge the work of Newton, Dee, even Archimedes if you like. Nothing is stopping you. Go, go!
 
Was is the molten steel that really wasn't molten steel?

Or the unopposed 100' collapse that happened because the strongest part of the building collapse first but nobody but NIST knows why, and low-and-behold and office fire dun it?

Or maybe those global NIST animations that look nothing like the video collapse, except both are buildings and the general direction IS down?
facepalmsmiley.gif


Some days, I just feel invisible...
 
This is a mighty lot of word salad for saying "I am just unable to understand and no one has taught me properly yet". This stance would be waaaay to thin for me to go before a public and make presentations.

Because you know you are insinuating that the folks over at NIST are either icredibly incompetent (more so than you), or they are liars who are covering up mass murder.
Could you please specify which of the two you think is more likely?
And compare that likelihood with the likelihood that you are incompetent? Or a liar?

Oystein, thanks again for your comments. My concern is mostly the NIST FEA. Their animations are garbage, no? So I look and see they did a global sim. Huh? There was like 1/4 million bolts, 200 miles of welds, means and methods deviations etc to model, yet they rode rough shod over and expected us to buy off on their animation "based" on FEA when they don't even show one FEA result of the root cause. Talk about placing the cart in front of the horse.

How about one or more vetted independent thermal, static and dynamic FEA surveys exploring a generous array of what ifs, using NIST/ARA's IGES assumptions. ARA (Kirkpatrick) told me their IGES data is off limits. Too bad that. But if this thing gets handled with due diligence, then, it is done, and the debate is over…otherwise….

Btw, do you like NIST's animations? Are they realistic? How about the “collapse initiation” animation with the floating /spinning/dangling beams to the right....that's what 20 million gets these days? Computer sims of beams that defy gravity? Amazing!
 
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Perhaps it has something to do with gravity.

Seriously: Why do you act as though you were talking about flying teacups? Most people understand that falling things tend to fall at or near the acceleration of gravity.

True, if nothing but air separates them from the ground. Was there more that air in the 100' of WTC 7?

Many of us actually understand that increasing speeds are characteristic of gravitational accelerations; for you to speak as though decreasing speeds should be expected instead implies considerable ignorance.

Buckling of mild steels (and hefty portions thereof) has no transients. Amazing!


Once the structure has failed, however, gravitational acceleration becomes a possible (and all too likely) behavior.

And office fires on floor 13 of WTC do this? Fail the entire structure? Amazing!

The acceleration will be substantially less only if the failed structure retains enough strength and integrity to offer substantial resistance to acceleration by gravity; that is hardly a given.

And this was not the case?

Again, there's something wrong with your presentation here. For several hundred years, we've known that the mass of a structure has little to do with how fast it falls.

No, but much of that mass was column mass, column mass that was designed for structural stability. Structural stability that was part of a factor of safety of a certain redundancy to withstand much greater threats than office fire thermal expansion walking girder woo, like wind for example.

Bare assertion and argument from incredulity create the impression that you don't have much of an argument. By the time you get around to mentioning anything relevant, most people will already have classified you as just another raving crank.

If there's anything left of your argument after your empty words have been stripped away, it's likely to be an esoteric technical argument that I am unqualified to judge. At that point, I see an inexperienced junior engineer (who has already created a strong impression of incompetence) arguing with the technical conclusions of a large number of experts who put substantial time and effort into their report. The inexperienced junior engineer might be completely right and the experts completely wrong, but I'm not likely to get rich by betting that way.

Grownups know the experts aren't always completely right, especially in matters this complex. I have enough background and experience in science to assume there are problems with the NIST report and a legitimate debate about some of its details or conclusions.

That seems perfectly normal to me, not reason to start the revolution. Even if it were, against whom would we be revolting? The senior engineers and scientists who wrote the NIST report? And why? To elevate the status of a junior engineer who's fomenting the revolution?

Sorry, Derek, but from where I sit that revolution just isn't worth the trouble.

Love the generalizations...anyway, thanks for your comments.
 
Good grief! People have answered them before! Use the search function.

This has been answered. There are many metals present in the towers that have far lower melting points than steel, and on top of that, all of the witness testimony that I'm aware of places the sightings in the debris pile after collapse, sometimes weeks after. That makes it more logical that conditions in the debris pile caused the melting, not some disproven incendiaries in the towers prior to the collapses.

Until any of the sightings are 1. Shown to have existed to begin with, 2. Validated with leftover hardened remains (and the only ones I've heard of have been of aluminum, not steel), and 3. Shown to have something to do with the pre-collapse conditions, there's nothing suspicious about such sightings, nor is there anything which contradicts the NIST report.

Again:
http://www.911myths.com/html/wtc_molten_steel.html
http://www.debunking911.com/moltensteel.htm
http://sites.google.com/site/wtc7lie...lssortingopera

No bias in those sources. So, the molten steel testimonies really didn't mean molten steel. They were all mistaken? All?

This has been discussed many times before; here's one thread. Summary: David Chandler discovered that there was a brief period of unresisted collapse bounded by periods of resisted collapse. Or in short, the drop is only part of the story, and merely indicates that the perimeter of the buildings was in unresisted collapse - free fall - for only a small portion of its descent. The most this indicates is that some floors failed together as a unit. How this is supposed to indicate anything suspicious, I'd love to know. But free fall =/= demolitions, let alone free fall for only a small portion of the collapse.

How did the strongest part of the building collapse then, one walking girder from an office fire that was out before the collapse? What isn't suspicious about a building that falls 100' without opposition deriving this claim from the strongest part falling-imploding from an “office fire”? And what would or could cause a strong inner core of A36 column steel and built up to well over 1000 lb/ft diagonally and laterally braced to collapse? Hm?

Oh yeah, of course, an office fire!

I'm so sorry, how did I miss this?

Who could miss this? And how did I miss the stunning accuracy of the NIST models? You've convinced me, time to go now.

Another issue that's been discussed in the past. Here's one link out of several. I need to defer discussion on that topic to others better versed in it than me.

I appreciate the links, and I will get to them. TFK invited me hear to "learn" more about WTC 7, and I only want to do just that. But still, I'm talking to a group of forum participants that who claim to be skeptics and see no need for another FEA to substantiate of refute what NIST has plopped on the ground.

What would be so wrong with NIST/ARA releasing their IGES and all sim, boundary condition, and input assumptions? You wouldn't be against that would you?
 
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Thanks for your concern Newton.

http://www.youtube.com/watch?v=48XH...83DB2E7EB&playnext_from=PL&index=0&playnext=1

What did I get wrong, then? I certainly offered a lot in over 1 hour time.

Was is the molten steel that really wasn't molten steel?
...

How many times must you be told that eyewitness reports of molten steel =/= molten steel???

Try this, please!

 
...
I still have yet to hear of design considerations for office fire thermal expansion...

It was specifically a finding of NIST that thermal expansion (the existance of which you hopefully do not deny) was NOT a consideration in the Building Codes for New York, and therefore probably not a design consideration for the WTC, and they specifically recommend that such considerations be included in building codes in the future.
 
1/4 million bolts, 200 miles of welds
[Citation Needed]
\o/
|
/ \

What building are you talking about? For WTC 7 that's about 4 miles per floor of welds so that can't be it. For any one of the towers that's just under 2 miles per floor of welds which also doesn't make much more sense considering at least half of the connections were bolted on any given floor.
 
Oystein, thanks again for your comments. My concern is mostly the NIST FEA. Their animations are garbage, no? So I look and see they did a global sim. Huh? There was like 1/4 million bolts, 200 miles of welds, means and methods deviations etc to model, yet they rode rough shod over and expected us to buy off on their animation "based" on FEA when they don't even show one FEA result of the root cause. Talk about placing the cart in front of the horse.

How about one or more vetted independent thermal, static and dynamic FEA surveys exploring a generous array of what ifs, using NIST/ARA's IGES assumptions. ARA (Kirkpatrick) told me their IGES data is off limits. Too bad that. But if this thing gets handled with due diligence, then, it is done, and the debate is over…otherwise….

Btw, do you like NIST's animations? Are they realistic? How about the “collapse initiation” animation with the floating /spinning/dangling beams to the right....that's what 20 million gets these days? Computer sims of beams that defy gravity? Amazing!

Look at
http://wtc.nist.gov/media/WTC7RevisedTechnicalBriefing111908.pdf

Page 23: ANSYS Striuctural Response Model:
"93,413 Nodes
101,357 Elements
...
Analysis time: approximately 6 months"

Page 24: LS-DYNA Structural Response Model
More than 3 million Nodes and Elements, 8 weeks Analysis time


Pretty shoddy, eh?

If you want to do better than that, what will it cost, and who should pay for it?
How reasonable is YOUR personal doubt to justify such expenses?
 
What would you expect to learn from it?

800 C was assumed to completely surround the 79-44 beam. I'd first thermal check this, because I didn't get near this much (HEAT TRANSFER) from on a 6' cupola that I dried with a 3600+ F (TEMP) propane flame, indirect..@ 5:00

http://www.youtube.com/watch?v=IbZAHODNyE8&feature=related

Running different fire scenarios until 800 C is reached for 40 minutes would reveal plenty. Then the initiation of the broken connection would required a bit of modeling...there is probably 3-5 other beams that intersect this "walking girder" and they would have to be assumed fixed that their other ends. The “non-walking” end (44) would be fixed and the bolts and welds should be modeled with general means and methods errors. The shear studs (above the walking girder and 3-5 intersecting beams) and deck pan as well as reinf concrete above should be modeled in the initiation FEA survey as well...showing the von Mises gradient output.

Did NIST do all this? Where?

The results at this point should be convincing either way, and easy to disprove if crap.

However, if NIST’s initiation claim is right, then the gruesome task of dynamic scenarios could go, but the iterations, time, and cpu calcs for fine mesh would be tedious. The amount of indeterminate eqs would make this job tough, but if the world of simulations...beams can spin, dangle and float in mid air and not pay any mind to gravity, ask NIST for more info.
 
No bias in those sources. So, the molten steel testimonies really didn't mean molten steel. They were all mistaken? All?

Possibly yes: All. And why not? Please give my 7 exhibits of molten somethings a try!



How did the strongest part of the building collapse then, one walking girder from an office fire that was out before the collapse? What isn't suspicious about a building that falls 100' without opposition deriving this claim from the strongest part falling-imploding from an “office fire”? And what would or could cause a strong inner core of A36 column steel and built up to well over 1000 lb/ft diagonally and laterally braced to collapse? Hm?

Oh yeah, of course, an office fire!

I'm so sorry, how did I miss this?

Who could miss this? And how did I miss the stunning accuracy of the NIST models? You've convinced me, time to go now.
...

You are trying to mask your incredulity and ignorance in sarcasm, and you fail. Your putting "office fires" between quotation marks is a dead give-away.

You have been told many times that your A36 column had NO proper lateral bracing by the time it buckled. It only took for some joints to come off in an unfought fire extending over several floors. No amount of sarcasm and incredulity will discuss that away.





Are you saying the NIST guys are too dumb to see what you see, or are you saying they are liars?
(Or do you see another possibility for why they could have gotten their cornerstone finding (IYO) so wrong?)
 
800 C was assumed to completely surround the 79-44 beam. I'd first thermal check this, because I didn't get near this much (HEAT TRANSFER) from on a 6' cupola that I dried with a 3600+ F (TEMP) propane flame, indirect..@ 5:00

Heat != temperature. And scale plays a huge role in this.

Are you sure you're an engineer??

Did you ask NIST for the things you're fussing about, or are you merely assuming they won't be released? As if we didn't know.
 
...
Buckling of mild steels (and hefty portions thereof) has no transients. Amazing!

You have been told several times that the north facade did not enter free fall at T=0 but at T=1,75s- That is your transient time.


And office fires on floor 13 of WTC do this? Fail the entire structure? Amazing!

And this was not the case?

You either did not read or did not understand NIST's collapse sequence. By the time your fabled free-fall commenced, the interior structure was already entirely compromised.

No, but much of that mass was column mass, column mass that was designed for structural stability. Structural stability that was part of a factor of safety of a certain redundancy to withstand much greater threats than office fire thermal expansion walking girder woo, like wind for example.

Design isn't always perfect, and NIST found a flaw in WTC7's design (and in the BCNYC). Get on with it.
No building has redundancy built in for the dynamic loads it experiences once collapse has begun.

Love the generalizations...anyway, thanks for your comments.

We are still waiting for your specifics. Why do you think was it impossible for the girder to walk? So far you have only forwarded incredulity and a little talk of static strength of unmolested columns.
 
Look at
http://wtc.nist.gov/media/WTC7RevisedTechnicalBriefing111908.pdf

Page 23: ANSYS Striuctural Response Model:
"93,413 Nodes
101,357 Elements
...
Analysis time: approximately 6 months"

Page 24: LS-DYNA Structural Response Model
More than 3 million Nodes and Elements, 8 weeks Analysis time

Pretty shoddy, eh?

If you want to do better than that, what will it cost, and who should pay for it? How reasonable is YOUR personal doubt to justify such expenses?

Massive money, and JREF members should pay for it. Actually I’ve pestered Mr. Gage and AE911 about this for years. This and more FOIA would get far more done that shaking the ol index finger at Larry “pull it” Silverstein ever will, imo. $20,000 is the FEA software cost, and there isn't a computer made that could handle the amount of nodes & elements...so it would have to go piecewise...speaking of elements...

101,357 Elements…this keep getting better. There were probably in excess of 300,000 structural bolts in that building alone. 93,000 nodes is nothing with respect to the magnitude of WTC 7. Go back a few pages and read my comment of the likeliness of simulating an entire structure such as WTC 7? What did I say, read it. I’m no FEA expert, but I’ve done my fair share under and post grad, what they are claiming is a stretch, to put it mildly.

Better still, call a sales rep at ANSYS, ALGOR or LS-DYNMA tomorrow, and tell them you want the package that will dynamic collapse simulate a 600 ft ½ billion pound skyscraper…see if they don't ask you to get your mommy's permission before you play with the phone.

How about just FEA substantiation of the collapse initiation or a lab test proving the "office fire thermally expanding walking off the seat girder" woo?

Is that too much to ask for?
 
No bias in those sources. So, the molten steel testimonies really didn't mean molten steel. They were all mistaken? All?

Nothing like an argument from incredulity. Tell you what: Point out which of the witnesses actually took a sample and eliminated the plethora of other metals available from the towers from consideration and we'll talk. While you're at it, explain the state of the steel recorded in NCSTAR 1-3C for the main towers. Bottom line: You have yet to establish that the sightings were in fact steel. The witnesses certainly didn't. And you're not accomplishing it either.

While you're at it: Attack the argument, not the sites they're posted on. If you don't like the fact that, say, Debunking911.com pointed out errors in the analysis of the molten flow falling from WTC 2, then state what's wrong with what the site said. Just bleating "bias!" is no counterargument.

As a bonus, if we presume that molten steel was indeed sighted, explain it's significance. And why the steel that was sitting in a burning rubble pile for months couldn't have been rendered molten there instead of in the towers.

How did the strongest part of the building collapse then, one walking girder from an office fire that was out before the collapse? What isn't suspicious about a building that falls 100' without opposition deriving this claim from the strongest part falling-imploding from an “office fire”? And what would or could cause a strong inner core of A36 column steel and built up to well over 1000 lb/ft diagonally and laterally braced to collapse? Hm?

Why couldn't an entire section of 7 World Trade not fail as a unit? And what's supposed to be significant about the fact that it only was in free fall for part of the collapse? Why would there be resistence immediately before the period of free fall, and immediately after? Was it a batched demolitions job?

No, I don't know why a "walkng girder" as you put it would or wouldn't be suspicious. What I'm trying to do is get you to move past arguments of incredulity and address issues.

Oh yeah, of course, an office fire!

I'm so sorry, how did I miss this?

I don't know. How'd you miss the fact that no formerly molten then rehardened steel was reported to have been recovered?

Who could miss this? And how did I miss the stunning accuracy of the NIST models? You've convinced me, time to go now.

You're not even saying what's wrong with the NIST models beyond "Does it look right??" Explain what's wrong with it!

I appreciate the links, and I will get to them. TFK invited me hear to "learn" more about WTC 7, and I only want to do just that. But still, I'm talking to a group of forum participants that who claim to be skeptics and see no need for another FEA to substantiate of refute what NIST has plopped on the ground.

What would be so wrong with NIST/ARA releasing their IGES and all sim, boundary condition, and input assumptions? You wouldn't be against that would you?

Nothing. I'm not against it. But that's not the element of your stance that's being disputed. What's being disputed are your 1. Overly credulous acceptance of anecdotal evidence for molten steel without confirmation via recovery of hardened pools, testing of such flows, or elimination of other plentiful metals like aluminum, lead, etc., and 2. Your organization's stance that somehow, demolitions were used to collapse the towers.
 
Massive money, and JREF members should pay for it. Actually I’ve pestered Mr. Gage and AE911 about this for years. This and more FOIA would get far more done that shaking the ol index finger at Larry “pull it” Silverstein ever will, imo. $20,000 is the FEA software cost, and there isn't a computer made that could handle the amount of nodes & elements...so it would have to go piecewise...speaking of elements...

101,357 Elements…this keep getting better. There were probably in excess of 300,000 structural bolts in that building alone. 93,000 nodes is nothing with respect to the magnitude of WTC 7. Go back a few pages and read my comment of the likeliness of simulating an entire structure such as WTC 7? What did I say, read it. I’m no FEA expert, but I’ve done my fair share under and post grad, what they are claiming is a stretch, to put it mildly.

Better still, call a sales rep at ANSYS, ALGOR or LS-DYNMA tomorrow, and tell them you want the package that will dynamic collapse simulate a 600 ft ½ billion pound skyscraper…see if they don't ask you to get your mommy's permission before you play with the phone.

How about just FEA substantiation of the collapse initiation or a lab test proving the "office fire thermally expanding walking off the seat girder" woo?

Is that too much to ask for?

What makes you believe that their analysis of the initiating event was deficient? Except that you cannot make your little brain believe or imagine it?

And if you say a full scale sim of the entire building is impossible and the software providers would agree to that, then what is your beef with the 100' drop and your claim that the NIST animation does not look exactly like the real thing? If it can't be analysed, why do you ask for a new analysis?

And why should Richard Gage, of all people, be better equipped to help you there than NIST?
Has it occurred to you that maybe the "Scholars for truth" are avoiding such anaylsis, like the devil avoids consecrated water, because they suspect the end of their truther career? "Just asking questions" is so much more convenient...
 
Heat != temperature. And scale plays a huge role in this.

Are you sure you're an engineer??

Did you ask NIST for the things you're fussing about, or are you merely assuming they won't be released? As if we didn't know.

I asked ARA, Dr. Kirkpatrick, and he spoke for NIST in saying the IGES was off limits to me all as well as the input assumptions. He offered no good reason as to why, believe me, I didn’t say ok and hang up.

As for heat vs temp :rolleyes:…without a heat gradient i.e. temperature differential there is no heat transfer, yes or no? Temperature differences will always attempt steady state.

My point about the pipe I used to dry my furnace refractory lining (5 min in)

http://www.youtube.com/watch?v=IbZAHODNyE8&feature=related

was that a 3600 F flame could get my refractory (Sparcast LC 32) to the requisite 1000 F only after 20 hours. Why? Now juxtapose this to the 79-44walking girder that was assumed 800 C after 40 minutes at all points from end to end and steady state within the beam. See my dilema?

And why didn't my 3600 degree propane flame "melt" the 2800 deg MP A53B pipe? And why didn't the said pipe receiving direct impingement (from IR measurement and visually) indicate/measure only 1800 F on the pipe OD. See my photos. The difference between heat transfer and temperature are at the core of what I lay at your feet, the same thing you accuse me of have no knowledge of. Ironic!

Btw, I don't think you are supposed to be talking to me yet, I don't think I've crossed over your "threshold of interest".

You have standards to uphold you know!
 

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