Ed zachary.
When is it going to stop
- Thread starter Kinnakeet
- Start date
kwillia
n/a
A Coyote you say?
PeoplesElbow
Well-Known Member
LightRoasted
If I may ...
If I may ...
Ok. So in your vast experience with steel, after watching the video, why did building 7 come down, since @Gilligan won't or can't answer the question.
Ok. So in your vast experience with steel, after watching the video, why did building 7 come down, since @Gilligan won't or can't answer the question.
PeoplesElbow
Well-Known Member
Columns lost their horizontal bracing from a combination of actual damage from falling debris and the normal building fires causing thermal stresses. Once a few beam started to buckle it placed side loads on other columns which compounded the matter and caused a chain reaction.
The cross bracing on a steel skeleton building is more important than most realize. The critical load of a column in the buckling equation increases very quickly because it's a 2nd order function with respect to length, double the length you reduce the critical load by a factor of 4, quadruple the length you reduce the critical load by a factor of 16.
The structural fires were also not contained by sprinklers or a fire crew so they were let go.
Also gravity acts straight down.
black dog
Free America
Maf is hard,,, engineering stuff is really hard....Columns lost their horizontal bracing from a combination of actual damage from falling debris and the normal building fires causing thermal stresses. Once a few beam started to buckle it placed side loads on other columns which compounded the matter and caused a chain reaction.
The cross bracing on a steel skeleton building is more important than most realize. The critical load of a column in the buckling equation increases very quickly because it's a 2nd order function with respect to length, double the length you reduce the critical load by a factor of 4, quadruple the length you reduce the critical load by a factor of 16.
The structural fires were also not contained by sprinklers or a fire crew so they were let go.
Also gravity acts straight down.
Well unless one is gifted and went to UMCP....
ever stop to consider that you are in the "morons that cannot be reached" category? You might wanna do that. ;-
PeoplesElbow
Well-Known Member
In addition the building took over 5 seconds to collapse completely, complete free fall due to gravity would have been under 4 seconds.
LightRoasted
If I may ...
If I may ...
Columns lost their horizontal bracing from a combination of actual damage from falling debris and the normal building fires causing thermal stresses. Once a few beam started to buckle it placed side loads on other columns which compounded the matter and caused a chain reaction.
The cross bracing on a steel skeleton building is more important than most realize. The critical load of a column in the buckling equation increases very quickly because it's a 2nd order function with respect to length, double the length you reduce the critical load by a factor of 4, quadruple the length you reduce the critical load by a factor of 16.
The structural fires were also not contained by sprinklers or a fire crew so they were let go.
Also gravity acts straight down.
Ahh. I see now. A couple of Jim Jones followers. Now I understand.
bwa haa haaa...oh the irony....
PeoplesElbow
Well-Known Member
Sorry blaming Jews was never mentioned in any engineering textbook or class I took.
PJay
Well-Known Member
Just saw this someone sent me
Mr. Jennings was a whistleblower who was inside WTC building 7 on 9/11. He reported multiple explosions before the building fell. He reported that the lobby was completely blown out and that he had to step over dead bodies on the way out of the building.
Barry was an outspoken leader in the 9/11 movement when it first started. He mysteriously died after a few years of speaking out.
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PeoplesElbow
Well-Known Member
I'd imagine if someone was in a building that was having floor joist failures, failing bolts/rivets they would think the sound from that was explosions. There is an unbelievable amount of potential energy going into doing that.
The sound from a 1 inch wide metal coupon failing is quite loud, about the same as a .22LR being fired, maybe a .32 ACP.
LightRoasted
If I may ...
If I may ...
Must have been one of the weakest steel framed buildings ever built to have been chosen and to have been used by the Gov as a nuclear fallout shelter.
muah ha haaa....
Column buckling is tremendously loud.
PeoplesElbow
Well-Known Member
There is a condo in Miami and an apartment building in London that just collapsed, no fire, no damage from the second tallest building in the world falling beside them. Not sure why the Jews cared about those buildings though.
Correction, the London apt building was concrete panel construction.
Buckling has nothing to do with strength, it has to do with stability. The strength of the material doesn't matter at all in the calculation.
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Yep...pretty massive structural failure.