Has Anyone Seen A Realistice Explanation For Free Fall Of The Towers?

[Regnad Kcin]

...Undoubtly they would have preferred that they could keep it all secret, but many people knew. Here is a letter from an architect to his parents.

September 17, 2001
Dear Mom and Dad,

I had just started a letter to you folks when I checked my voice mail
and had a message from Dad to call him back. I enjoyed our brief call, and
thanks for the stock update. I am still shaken over what has happened. I keep
replaying that day over and over in my head. We studied the Trade Towers
extensively when I was in school. They were one of the first examples of an
innovative and efficient structural concept called "tube" restraint. The Sears
Towers are a variation called "bundled tube construction" and the idea is based
on a minimum of interior columns, with the exterior facade having more numerous
exterior perimeter columns. In the case of the WTC, there are no interior
columns. Only a central concrete core roughly 60-80 feet square comprised of
several vertical voids that house exit stairs, hoistways for the elevators,
utility raceways and mechanical chases; and also, significantly, the sprinkler
system main lines. The floors were prefabricated broad cellular panels of
parallel trusses and main decking that had a light weight concrete topping
applied after they were installed. They spanned a distance of roughly 60 feet
from the concrete core to the exterior gridwork of columns and horizontal
beams. the floor trusses restrained the exterior walls and prevented them from
buckling outward. The exterior structural system was prefabricated in panels of
multiple columns (steel tubes only 14 inches square) that spanned vertically
through 2 or three floors. This was a fast way to erect the building and helped
enclose the building faster. At the upper floors, the winds are so high at
times that no other work can begin (including pouring the floor topping) until
the exterior is in place.

Mr. Brown,

You are good for at least one hearty laugh a day. Please don't ever change.

 

[Powa]

So, this architect writes to mom and dad and goes all technical on them? Riiiiight. Christophera, if you can't lie well, don't do it at all.

 

[uruk]

Dear Mom and dad,
instead of wirting about what i'm doing and how I am especially considering what happened after September 11th, I'm going to write to you instead about stuff you could care less about and probably won't understand. but I'm doing it just in case some guy needs to make a website about how the World Trade Center has a concrete core.

Love, your son,Chris...uh, Phil.

 

[Blue Mountain]

(much stuff snipped)
September 17, 2001
Dear Mom and Dad,

I had just started a letter to you folks when I checked my voice mail
and had a message from Dad to call him back. I enjoyed our brief call, and
thanks for the stock update. I am still shaken over what has happened. I keep
replaying that day over and over in my head. We studied the Trade Towers
extensively when I was in school. They were one of the first examples of an
innovative and efficient structural concept called "tube" restraint. The Sears
Towers are a variation called "bundled tube construction" and the idea is based
on a minimum of interior columns, with the exterior facade having more numerous
exterior perimeter columns. In the case of the WTC, there are no interior
columns. Only a central concrete core roughly 60-80 feet square comprised of
several vertical voids that house exit stairs, hoistways for the elevators,
utility raceways and mechanical chases; and also, significantly, the sprinkler
system main lines. The floors were prefabricated broad cellular panels of
parallel trusses and main decking that had a light weight concrete topping
applied after they were installed. They spanned a distance of roughly 60 feet
from the concrete core to the exterior gridwork of columns and horizontal
beams. the floor trusses restrained the exterior walls and prevented them from
buckling outward. The exterior structural system was prefabricated in panels of
multiple columns (steel tubes only 14 inches square) that spanned vertically
through 2 or three floors. This was a fast way to erect the building and helped
enclose the building faster. At the upper floors, the winds are so high at
times that no other work can begin (including pouring the floor topping) until
the exterior is in place.

(other stuff snipped)

This letter raises more questions than it answers.

1. Who wrote it?
2. How did you obtain the letter?
3. What are the architect's credentials?
4. Do you have only a copy, or do you have (access to) the original?

Without this additional information, the letter is as useless ar your web site.

 

[Bell]

Oops, ignore this.

You have to talk to poverty101 about that.

 

[Christophera]

So, this architect writes to mom and dad and goes all technical on them? Riiiiight. Christophera, if you can't lie well, don't do it at all.

I wondered about that too, it came off the usenet. Apparently the guys brother wrote their parents regarding what he knew about the WTC.

 

[Christophera]

Usenet Post

Here is another.

this guy saw the very beginning where the core was formed standing free and the steel went up around it. After 5 or 6 floors a person on the street wouldn't be able to see so his account of the process is not correct.




From: tomorle@postoffice.worldnet.att.net (Thomas)
Newsgroups: alt.architecture,sci.energy,soc.history.medieval
Subject: Re: World Trade Center collapse
Message-ID: <3ba01ef2.11885093@news>
References: <jmsn7.736$ar5.37551@news1.rdc1.ga.home.com> <xRsn7.20$eV3.292@typhoon.nyu.edu> <9nlp4k$eni$5@news.umbc.edu> <tZtn7.28$eV3.331@typhoon.nyu.edu> <
69un7.285700$NK1.26585170@bin3.nnrp.aus1.giganews.com>
X-Newsreader: Forte Free Agent 1.11/32.235
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Date: Thu, 13 Sep 2001 02:54:50 GMT
NNTP-Posting-Host: 24.5.188.36
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"Tony Jebson" <jebbo@texas.net> wrote:

>......Apparently, the WTC towers had no internal
>structural columns but relied on the exterior structure for
>support / strength. No doubt the impact of an airplane does
>this no end of harm.
I worked in downtown NY in the late 1960's when the towers were
built! At lunch time we went to the construction site to watch the
progress. And we saw them first buildt an internal thick walled
rectangular concrete core inside which later the elevators ran. The
steel work was erected around this core several floors behind!

 

[defaultdotxbe]

Here is another.

this guy saw the very beginning where the core was formed standing free and the steel went up around it. After 5 or 6 floors a person on the street wouldn't be able to see so his account of the process is not correct.

can you find one person who does remember the "correct" process? or are you the only person in the world who knows the "truth?"

 

[Christophera]

This letter raises more questions than it answers.

1. Who wrote it?
2. How did you obtain the letter?
3. What are the architect's credentials?
4. Do you have only a copy, or do you have (access to) the original?

Without this additional information, the letter is as useless ar your web site.

Her is the header to the usenet post.

Message-ID: <3BAD5E05.F5A92E1E@aol.com>
From: The Wizard of Oz <never_was@aol.com>
Reply-To: wizard@wiz.mailshell.com
Organization: abuse@wiz.mailshell.com
X-Mailer: Mozilla 4.51 [en] (Win98; U)
X-Accept-Language: en
MIME-Version: 1.0
Newsgroups: dfw.singles
Subject: The Letter
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 19
Date: Sun, 23 Sep 2001 04:07:51 GMT
NNTP-Posting-Host: 65.1.47.166
X-Complaints-To: abuse@home.net
X-Trace: news1.rdc1.tn.home.com 1001218071 65.1.47.166 (Sat, 22 Sep 2001 21:07:51 PDT)
NNTP-Posting-Date: Sat, 22 Sep 2001 21:07:51 PDT

As many of you know, I have a brother who lives in Birmingham, Ala who is an
architect of some stature in his community. He has never let his successes go to
his head, and is still the nice guy I grew up with.
Just a day or two ago, my parents got a letter from him regarding the recent
national tragedy in New York and Washington DC. He gave some technical details
about the construction methods used in the WTC Towers which are very
interesting, and also talks about his own thoughts on effects of the destruction
on the country and himself. I found it extremely interesting, even if he is my
brother, and, with his permission, will post it here in the NG for you to read
if you care to. The technical aspects of the constructions get a little
detailed, but he wrote it aiming at our parents who are non- professional in his
field, but learned a little from him when he was in school.
His own thoughts are interesting, to me, but I may be just prejudiced. Read it
if you wish, or just move on to the next one.
--
Regards,
Wiz
Reply to: wizard (at) wiz dot mailshell dot com
Complaints to: abuse@wiz.mailshell.com

 

[Christophera]

can you find one person who does remember the "correct" process? or are you the only person in the world who knows the "truth?"

IF folks would realize that this is an issue, and get their act together, THEN the public will hear and those that know also can come forward.

Do you actually think I know every person in the USA?

 

[Christophera]

Mr. Brown,

You are good for at least one hearty laugh a day. Please don't ever change.

That's the way it is with concrete here at jref, just full of giggles and evidence of common knowledge.

 

[LashL]

And we saw them first buildt an internal thick walled
rectangular concrete core inside which later the elevators ran. The
steel work was erected around this core several floors behind!

Um, Chris,

Isn't this the exact opposite of what you have been postulating for years now? You say that the steel was constructed several floors ahead of the concrete, and that is why this imaginary concrete core of yours is not visible in the hundreds of construction photos. Yet this anonymous internet source (like all of your sources) upon which you seem to rely is contradicting one of the core (pardon the pun) premises of your imaginary core.

In any event, the truth is that there was not and never has been a concrete core in the WTC towers. The sooner you realize that, the sooner you can get on with your life and seek the help that you need.

 

[sleahead]

And here is the letter in its entirety:

September 17, 2001

Dear Mom and Dad,

I had just started a letter to you folks when I checked my voice mail
and had a message from Dad to call him back. I enjoyed our brief call, and
thanks for the stock update. I am still shaken over what has happened. I keep
replaying that day over and over in my head. We studied the Trade Towers
extensively when I was in school. They were one of the first examples of an
innovative and efficient structural concept called "tube" restraint. The Sears
Towers are a variation called "bundled tube construction" and the idea is based
on a minimum of interior columns, with the exterior facade having more numerous
exterior perimeter columns. In the case of the WTC, there are no interior
columns. Only a central concrete core roughly 60-80 feet square comprised of
several vertical voids that house exit stairs, hoistways for the elevators,
utility raceways and mechanical chases; and also, significantly, the sprinkler
system main lines. The floors were prefabricated broad cellular panels of
parallel trusses and main decking that had a light weight concrete topping
applied after they were installed. They spanned a distance of roughly 60 feet
from the concrete core to the exterior gridwork of columns and horizontal
beams. the floor trusses restrained the exterior walls and prevented them from
buckling outward. The exterior structural system was prefabricated in panels of
multiple columns (steel tubes only 14 inches square) that spanned vertically
through 2 or three floors. This was a fast way to erect the building and helped
enclose the building faster. At the upper floors, the winds are so high at
times that no other work can begin (including pouring the floor topping) until
the exterior is in place.

Once the building was closed in, the underside of the floor assemblies
were sprayed with a cementitious mineral fiber coating for fire resistance.
Then the sprinkler lines were run, along with ductwork laterals from the main
ducts built into the floor assemblies. A ceiling grid would have been hung and
minor interior partitions fastened to the floor and ceiling grid and covered
with gypsum board panels. A building that size, 10 million square feet, would
have each floor (roughly 40,000 square feet each) separated by fire/smoke
barriers and exit corridors that prevented the migration of smoke and fire
throughout a given floor.

The stairs would have been considered an absolutely safe haven to leave
a fire-envolved floor to an area of safety. In high rise construction, the
stair towers are required to have the capability of being pressurized by large
fans so that, in a fire emergency, smoke will be kept out of the stair; even
with a number of the stair doors open. Otherwise it makes a perfect chimney.
That is why you should never use an elevator in a fire. There are hose
connections and hose cabinets at each floor so the firemen can fight the blaze
where ever it may occur without hauling hose up the building.

I'm no structural engineer, but the impact of the planes must have
severely damaged the center core. They were designed to handle a Boeing 707; a
typical plane in use in the late 60's. But no one imagined the thousands of
gallons of fuel that poured into the structure. With essentially every fire
barrier breached, the fuel must have flowed everywhere, and poured down the
cavities between floors. They say the fuel combined with all of the furnishings
produced fire temperatures in excess of 1000 degrees. Building beams and
columns are protected with the fire proofing to prevent structural failure at
temperatures of 1500 degrees for 1-hour. That is the way we design them per the
requirements of the various building codes. Combined with the automatic
sprinkler systems, the fire proofing in a structural steel building is intended
to give firemen enough time to contain the blaze.

With the sprinkler risers severed, and the cascading flood of fuel, the
firemen would never have been able to save the building's structure from
thermal failure in time. Ironically, Building 2 survived exactly one hour
before it collapsed. Building 1 lasted close to 1 3/4 hours. When the high
temperature caused the first few floor trusses to sag and pull away from the
exterior wall, the wall buckled outwards, causing a chain reaction of dropping
floor trusses, and buckling walls all the way to the bottom. The center core
would have been only designed to accommodate gravity loads, vertically imposed
loads. The falling floors must have created so much lateral force that the core
disintegrated in the same chain reaction. As each floor pancaked, a shockwave
blew out the windows and expelled the dust cloud of pulverized concrete, gypsum
dust, and the cementitious fiber fireproofing. It was one of the first
buildings constructed without asbestos fireproofing, so there should have been
no danger of that in the dust cloud.

In the last week, I have moved from shock and disbelief, through grief,
and have settled into an anger that won't go away. I keep thinking of those now
5,400 innocent people looking themselves in the mirror for the last time,
getting dressed for the last time and going to work. I can't imagine how those
firemen searching through the debris must feel. People of my generation, as I
mentioned to you before, never had a Great Depression, or a Pearl Harbor to
galvanize us and crystallize our beliefs; to bring us together as one nation. We
were just a pampered, unappreciative, self-centered bunch of self important
egos; wondering how best to get ahead. I don't think that is the case any more.
I still don't think the seriousness and gravity of this tragedy has hit us;
those of us without your WW II perspective.

From http://www.cosmicpenguin.com/911/chrisbrown/corerefs/ConcreteCore.001.txt

 

[Big Les]

http://www.cosmicpenguin.com/

I got so many clues skimming through the index page, I couldn't stand up.

 

[Z]

Another one of Chris's manufactured whole-cloth lie websites...

Not too surprising.

It would appear that C. Brown is creating a modern myth, all by himself.

Wow- what hubris.

 

[uruk]

Um, Chris,

Isn't this the exact opposite of what you have been postulating for years now? You say that the steel was constructed several floors ahead of the concrete, and that is why this imaginary concrete core of yours is not visible in the hundreds of construction photos. Yet this anonymous internet source (like all of your sources) upon which you seem to rely is contradicting one of the core (pardon the pun) premises of your imaginary core.

In any event, the truth is that there was not and never has been a concrete core in the WTC towers. The sooner you realize that, the sooner you can get on with your life and seek the help that you need.

Yea, I noticed how all the sources he quotes contradict eachother and construction photos. Where he notices the contradictions he calls them "confused".

 

[Belz...]

Smaller cores in towers are built ahead of the steel. Large cores are built after the steel using the steel as form supports.

Got any examples of that aside from the WTC ?

WTC 7 is being built now in that way.

WTC7 has been completed for a few months, Chris.

Attaching anything to concrete is difficult. Meaning the interior box columns which had great strength were attached to the concrete core and floor beams went between them then the fightweight floors were fastened to that.

But that would mean that the floors COULDN'T be built BEFORE the core was poured.

Under the best conditions using a straight edge guide, a welder. cutter fitter can make a cut that has almost no verigations from tip wobble. However, not every time.

So you admit it's possible. Thank you.

Yes, I was surprised. But then the steel crews were the elite of the tower construction group. They didn't even think about anything but getting more steel up faster,

Also, for safety, elevators on construction sites are typically tunneled to the work area with plywood. The core was dark inside so there is no seeing concrete while you are in it. The outer forms would cover it until they were stripped and the outer forms would require more time to make than the inner so they would be started right away perhpas leaving a window from the outside for a welder to do the butt welds from a floor when it was convienent.

This is just incredible. How could they possibly build a whole tower with NO ONE ever seeing the concrete ? Who poured it, anyway ? Ninjas ?

But you can find no images of any other column of sizes matching the interior box columns. Or the "MASSIVE BOX COLUMNS" that are legends almost. All that is seen are puny columns tat are fastened to the interior box columns.

Uh-huh. Those ARE the steel columns. They're not as flimsy as you think.

Yes, I believe you are correct, more than one pumping station would be required, and I remember there was a segment in the documentary that showed the batch plant and talked about the increasing pressures and auxilary pumps located up higher inthe towers.

Again, why not pour it like you do regular concrete cores ?

There was an effort to divide the seismic signals generated by the needed blast(s). Detonating the basement walls first removed a significant amount of energy from the final blasts which fractured te core foundation as the core itself was detonated in 40 foot sectons, 3 per second from the top down just behind a third set of detonations which took out a floor every 75 milliiseconds.

Except none of those explosions were detected or seen.

 

[Belz...]

Since my site,

only uses raw evidence of images of the demolition, it is more credible than any web site and uses others that have statements from unintersted parties that corroborate the concrete core.

What's "raw" evidence, chris ?

If you are censoreing any of the information, you are doing people a disservice.

Only your government can "censor" your information.

I've told you a number of times that no one involved with the construction is going to talk about the true strcuture that was built. You call them. I've read many times where people have called to find that they can get no informaton whatsoever.

Very convenient. To you, lack of evidence is actually evidence in your favour. You can't lose.

I worked in downtown NY in the late 1960's when the towers were
built! At lunch time we went to the construction site to watch the
progress. And we saw them first buildt an internal thick walled
rectangular concrete core inside which later the elevators ran. The
steel work was erected around this core several floors behind!

But that statement contradicts your claim, chris.

 

[Belz...]

Yea, I noticed how all the sources he quotes contradict eachother and construction photos. Where he notices the contradictions he calls them "confused".

Must be the hypnosis.

 

[Blue Mountain]

Another one of Chris's manufactured whole-cloth lie websites...

Not too surprising. (remainder snipped)

While the website is yet another effort by the unstoppable Chris Brown, the usenet postings he has quoted are authentic.

Go to http://groups.google.com and enter the following text into the search box:

3BAD5E05.F5A92E1E

Here is a link to the thread found by the search. (The link's not guaranteed to work; the result may be specific to my search due to cookies sent to my browser by Google.)

With respect to the concrete core mentioned in the Usenet post, I'd like to make the following observations:

• The writer is an architect, not a construction engineer
• He studied the towers in school, but I have no idea how many years prior to 2001 that was
• He never mentioned visiting the WTC, so he may not have physically seen the building. He certainly never saw it while it was being built.
• He was writing under stress (he indicates he's angry) - this was only six days after the towers fell

So while the letter says "concrete core", there's nothing to indicate the writer of the letter was close enough to the design and construction to state that with authority. It's not even hearsay evidence.

Chris, the letter is useless as evidence for your mythical concrete core.

I'll repeat that to ensure you don't miss it

The letter is useless as evidence for your mythical concrete core.