Originally posted by ANOK
reply to post by GenRadek
You have not explained anything that makes the building design act differently from known physics.
You can harp on about different designs all day but you offer no explanation as to WHY it makes a difference, and it's abvious from this claim you
have no idea what is involved, you just heard someone else say that on 9-11 myths. Rinse and repeat hey GenRadek?
You have not explained why the physics of resistance changes from one building design to another, and it is obvious by your hand waving of the facts
that you have no clue how to.
[edit on 2/16/2010 by ANOK]
ANOK, for all that flapping around, you havent really said anything correct about the situation.
Of course physics will work on all buildings, its just that it depends on the design of the building itself. A 100 story brick building will behave
differently than a steel framed building. Sure, gravity is the main thing to overcome when building a tall structure, or for that matter ALL
structures. But not all structures will behave the same way and the materials they are built from will not behave the same way when exposed to loads,
stresses, gravity, heat, sheer, etc. I think its you who should get into the real world and away from the basement computer and goofy conspiracy
sites.
I should explain why it makes a difference? I thought the differences would be obvious to an intelligent person, who knows how to think critically
and rationally. I didnt think it would be so complicated when saying a concrete cored building with steel re-enforced concrete columns would stand up
to fire better than a steel only frame. I didnt think that some people dont have the ability to think critically and understand that a concrete
columned, box framed building will behave differently than a 47 story steel framed building, that has a set of steel transfer trusses over a ConEd
substation at the base. I guess I was wrong.
So you mean to tell me you dont understand how a concrete and steel building has a different resistance factor than an all steel building? And here
you are arguing with me, when I know it and you dont? Why dont you just ASK me or someone, rather than pretending you know, cause obviously you have
no clue about what you are talking about. A building with a sturdy base is simple. A building that requires special transfer trusses over a con-ed
substation will have a whole new set of requirements and problems than the simpler designed building.
You keep making this claim after years of proof that you are wrong. An hours worth of carbon based fires is not going to cause thousands of
tons of construction steel to globally fail, as per the reason I've already explained that you keep ignoring with your 'but but but it's a
different design.
Again please explain, and learn, about thermal energy transfer and you will realize how silly this claim is. Get from behind your desk and get out in
the real world.
Only one or two parts have to fail? You are just making things up. You really think buildings are that weak? Then why didn't the tower fall after
the 93 bombing then? That bomb took out a whole basement and columns, but guess what it didn't collapse. Did they change the design since then?
An hours worth of fire? I'll assume you are talking about the Twin Towers:
Well lets see, you have a building, whose floors are supported only by light steel trusses. You understand that? Light steel trusses. Its is widely
known in the firefighters world that light steel trusses and fire are a dangerous combo. that is why firefighters do not enter warehouses and other
buildings that have a light steel truss system supporting the roof. Why? They fail easily in fires. Damaged fire-proofing would expose the trusses to
the fires heating them. If I were you, I would go and read up on just how dangerous light steel truss construction is in firefighting, and how light
steel trusses behave. It may surprise you.
You talk and talk and talk about heat transfer and such, but you forget one key element. Just how are the floor trusses connected to the columns?
You have two 5/8" steel bolts connecting the one end of the truss to the interior columns, and two more 5/8" bolts connecting to the exterior
columns, on thin steel seats. Now if you understood anything about heat transfer and such, you would know (or should know) that the greater the area
connecting the heated to the cooler side, the quicker the heat sink effect. More area = greater heat transfer. Now tell me, just how much heat can
transfer from a single 60ft long truss through four 5/8" bolts into the columns? Did you ever notice the floor trusses sagging prior to collapse?
Also you have fires spread over multiple floors, almost throughout the entire floor space, wall to wall. I think the heat sink effect would be
negligable on those affected floors.
Oh so now a carbon fire is not enough to heat a few critcal points to failure? Im pretty sure a few engineers and fire safety experts would disagree
with you, (and laugh too). Did you forget that the WTC was an office building filled with acres of carpets, office supplies, and each floor 40,000sq
ft, etc..... oh! And a 767 burning inside? How did you miss that fact ANOK? Its hard to take you seriously when you say things like this.
In 1993 no primary steel columns were severed. There were a few secondary steel members severed or damaged, but none of the main supporting core
columns were severed. Structural integrity was not a major issue. Check here:
www.docstoc.com...
Blowing up a basement's concrete floors is not going to do squat to a 110 floor building. It may reduce some of the stability down below and may
require bracing, but that was it. I'd read the report I posted above if I were you.
Oh so when a key part of a structure fails, nothing should happen right? Even after the structure's integrity has already been damaged earlier?
Well be sure to mention that to the people who lost their lives when the bridge in Minnesota collapsed a few years ago, when a steel plate failed,
sending the whole bridge down into the river. I'm making stuff up?
WTC7 had fires burning for 7 hours. 7 hours. Without any water poured onto
it. Fireproofing does have a certain time rating. I dont think 7 hours of uncontrolled fires was ever considered in the designs, over numerous floors
and no firefighting operations with water. Ever wondered why firefighters knew WTC7 was coming down? not because of any stupid demolitions, but
because the building was leaning, tilting, buckling. That is called creep. Read up on creep and the WTC7. That was the key fact and evidence that
structural integrity was going.
EDIT to add:
Why the WTC buildings collapsed A Fire Chief ’s Assessment
I'd read up on what this fire chief has to say about fires and steel buildings.
[edit on 2/17/2010 by GenRadek]