RE-EXAMINING OVER-PRESSURIZATION BELOW THE COLLAPSE FRONTS.
Bazant's "piston":
From BLGB:
But from our new knowledge of the core remnant, we know there was a gaping hole up the center of the building, which is obvious by looking at particle and dust movement:
We no longer have a giant "piston" with a 207x207 ft flat head creating global over-pressures through the lower structure. In fact, if we look carefully at the visible collapse fronts of WTC1 and 2, we can put limits on any theorized over-pressure building up within the floor spaces just under the collapse fronts by observing window and jet behavior on those floors at any moment.
Actual OOS propagation down the WTC2 east and south walls:
http://www.youtube.com/user/Xenomorph911WTC?&MMN_position=314:314#p/u/64/RfI8GHtjJB8
Actual OOS propagation down the WTC1 NW corner and west face:
http://www.youtube.com/watch?v=1iT7mmmc-YY&feature=channel_page
1st vital clue towards understanding true pressure build-up:
Uneven collapse fronts.
WTC1 south and north collapse fronts are separated by over 10 floors. WTC2 east and west collapse fronts are noticably separated by at least 5 floors.
For WTC1, the light grey floor by floor ejections appear as vertical rows of destruction, happening down the south side of the west face while the north side grey rows of ejections follow over 10 floors behind.
Both WTC1 and 2 have collapse fronts on different sides of the building separated by a number of floors. The floor by floor light grey ejections happen down vertical corridors, not across open floor spaces.
There is no way to explain the different elevations of different collapse fronts as pressurization of open floor space to the point of blowing out the windows in rows.
2nd vital clue towards understanding true pressure build-up:
Regulated velocity of OOS propagation rate. A terminal velocity is reached early in the ROOSD front and maintained at a relatively constant rate in all observable cases.
3rd vital clue towards understanding true pressure build-up:
Dust ejection speed, also regulated. If ROOSD was accelerating as it propagated downward, we would expect the rows of light grey dust at the collapse front to be ejected at increasingly faster rates. This is not observed. Instead, we witness a set speed of dust ejections that does not noticably increase at lower elevations.
We would also expect an increasing ejection rate of the individual isolated ejections, or "farts", witnessed below the collapse front as the front moved downward.
Ejection rates seem independent of elevation. This is a very important clue. According to BLGB, ejection rates should increase as the collapse front gets faster lower in the building. Instead, we see a terminal velocity of propagation and ejections of a pretty consistent size all the way down the buildings.