"Melting" point of WTC Glas?

[DC]

WHat kind of Glas was Used in the WTC 1 and 2 towers and do we know at what temperatures it gets fluid?

 

[grandmastershek]

WHat kind of Glas was Used in the WTC 1 and 2 towers and do we know at what temperatures it gets fluid?

From what I understand ordinary glass melts somewhere over 2500F, the better the quality the higher it melts.

 

[DGM]

WHat kind of Glas was Used in the WTC 1 and 2 towers and do we know at what temperatures it gets fluid?

I know I have that information in my office. It was nothing special. Unless you're looking for a specific manufacturer just google commercial glass properties. By code it was tempered but thickness would not effect it's "melting point".

If you strike out, i'll look it up later,

 

[Dash80]

I know I have that information in my office. It was nothing special. Unless you're looking for a specific manufacturer just google commercial glass properties. By code it was tempered but thickness would not effect it's "melting point".

If you strike out, i'll look it up later,

One thing that has always bothered me is the truther claim that there wasn't enough heat to break the windows.

In 102 Minutes there are accounts of glass shards falling from the buildings with a loud crash. I figured much of this would be those trapped on the upper floors smashing the windows to get fresh air.

How thick would the glass have been? Would it have taken quite a bit of effort for a person to smash something through them?

 

[Sword_Of_Truth]

Breaking is not the same as melting though.

Breakage would be the result of the frames expanding and the glass not taking the strain.

 

[Dash80]

Breaking is not the same as melting though.

Breakage would be the result of the frames expanding and the glass not taking the strain.

Yeah I understand that. It's likely the frames failed first popping out the glass?

 

[njslim]

Tempered glass can be broken by blow from pointed tool

To breakout windows on vehicles (which use tempered glass for side/rear windows)
FF use spring punch in corner to cause window to shatter into small pebble like pieces

Blow from sharp pointed instrument is most effective way

Otherwise takes hard blow (s) against entire window to cause it to shatter

 

[DGM]

One thing that has always bothered me is the truther claim that there wasn't enough heat to break the windows.

How much heat is required to break the windows depends on how the windows are secured. If a window is allowed to expand naturally (and evenly) with no constrictions it will not "shatter".

Trying to determine at what temp a window will break requires much more effort than any "truther" is willing to spend.

 

[leftysergeant]

We do have video of windows popping out of their frames at WTC 7, clearly from the heat alone.

 

[Sam.I.Am]

Tempered glass can be broken by blow from pointed tool

To breakout windows on vehicles (which use tempered glass for side/rear windows)
FF use spring punch in corner to cause window to shatter into small pebble like pieces

Blow from sharp pointed instrument is most effective way

Otherwise takes hard blow (s) against entire window to cause it to shatter

It doesn't even have to be a blow, just exert high enough pressure at a concentrated point. A spark plug end (the end that you connect the wire to) and the weight of an average male leaning against it will usually break the glass on car side windows. Rear windows are a bit more tricky because of the compound curvatures on most modern cars rear windows.

The spring punch method is safer because your much less likely to push your hand through the hole in the glass and cut yourself though...

 

[DC]

i meant not poping out orf breaking, but really melting, i was more thinking about already broken glass melting in the fire.

 

[leftysergeant]

Certainly, it takes less energy to melt a bunch of glass crumbs than it does to melt solid sheets of glass. A continuous, homogenous piece of anything will have some heat-sinking capacity.

We can assume that there was melted glass in the Towers, since there is almost always some melted glass at any major fire site.

The abscence or presence of melted glass, in and of itself, probably means little relevant to the cause of a fire.

I guess it is really only important here in as much as the glowing ooze from the south tower just prior to collapse could have been glass.

It is several times more likely that the incandescent waterfall is glass than that it is metal, especially metal melted in a thermitic reaction.

 

[DC]

Certainly, it takes less energy to melt a bunch of glass crumbs than it does to melt solid sheets of glass. A continuous, homogenous piece of anything will have some heat-sinking capacity.

We can assume that there was melted glass in the Towers, since there is almost always some melted glass at any major fire site.
The abscence or presence of melted glass, in and of itself, probably means little relevant to the cause of a fire.

I guess it is really only important here in as much as the glowing ooze from the south tower just prior to collapse could have been glass.

It is several times more likely that the incandescent waterfall is glass than that it is metal, especially metal melted in a thermitic reaction.

i was googling for it, but didn't find anything.

 

[leftysergeant]

i was googling for it, but didn't find anything.

It is almost as simple a fact as that water is wet. There is not likely to be a lot of commentary on the phenomenon.

(Just speaking from personal professional experience.)