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Why Fact-check? Why preserve a visual record?

The Website Written as a Book
Introduction to Book
1: Science and Subjective Viewpoints
2: Toward Accurate Collapse Histories
....2.1: Progressive Floor Collapses in the Twin Towers
....2.2: General Global Characteristics of Collapses
....2.3: Mathematical Basis of ROOSD Propagation
....2.4: WTC1 Accurate Collapse History
....2.5: WTC2 Accurate Collapse History
....2.6: WTC7 Accurate Collapse History
3: WTC Collapse Misrepresentations
....3.1: Purpose of the NIST Reports
....3.2: NIST WTC1 Misrepresentations
....3.3: NIST WTC7 Misrepresentations
....3.4: NIST WTC2 Misrepresentations
....3.5: Reviewing the Purpose of NIST and FEMA Reports
....3.6: Bazant Misrepresentation of Collapse Progressions
....3.7: Block Misrepresentations of Collapse Progressions
....3.8: AE911T Misrepresentations of the Collapses
4: Scientific Institutions Can Be Unaware of Contradiction
5: Reassessing the Question of Demolition
....5.1: The Case of WTC1
....5.2: The Case of WTC2
....5.3: The Case of WTC7
6: WTC Collapse Records Studied as Meme Replication
....6.1: Meme Replication in Technical Literature
....6.2: Meme Replication in Mass Media
....6.3: Meme Replication in Popular Culture
....6.4: John Q Public and the WTC Collapse Records

WTC Twin Towers Collapse Dynamics

Official, Legal Attempts to Explain Collapses

Academic Attempts to Explain Collapses Reviewed

On the Limits of Science and Technology

WTC Video Record

WTC Photographic Record
WTC1 Attack to Collapse
WTC2 Attack to Collapse
Fire Progression, WTC1 North Face
Fire Progression, WTC1 South Face
Fire Progression, WTC1 East Face
Fire Progression, WTC1 West Face
Fire Progression, WTC2 North Face
Fire Progression, WTC2 South Face
Fire Progression, WTC2 East Face
Fire Progression, WTC2 West Face
Debris: WTC1 Around Footprint
Debris: WTC2 Around Footprint
Debris: From WTC1 Westward
Debris: From WTC1 Northward
Debris: From WTC2 Eastward
Debris: From WTC2 Southward
Debris: Plaza Area, Northeast Complex
Debris: Hilton Hotel, Southwest Complex
Debris: General, Unidentified Locations
9/11 Debris: An Investigation of Ground Zero
Airplane Debris around WTC Complex
Damage to Surrounding Buildings
Perimeter Column Photo Record
Perimeter Columns: Types of Damage
Core Box Columns: Types of Damage 1
Core Box Columns: Types of Damage 2
Complete Photo Archive

WTC Structural Information

Log In


Remember Me

Online Misrepresentations of the WTC Collapses

Forum, Blog Representations of the WTC Collapses

The Book Tested Through Experiments

Miscellaneous Notes, Resources

New Ideas in Education

20 Years of Misrepresenting Twin Towers Collapses

WTC2 E Face Perimeter Pulls in, Breaks Along Bolt Seam

WTC2 E Face Perimeter Pulls in, Breaks Along Bolt Seam

High resolution video shows that the line of perimeter columns along the east face of WTC2 which bent inwards during the earliest moments of collapse initiation broke along bolt connections after being pulled in.

There is no evidence that the perimeter buckled inwards. There is substantial evidence that the east perimeter broke into an upper and lower sheet cleanly along a zig-zag line of bolt connections with no permanent column deformation or buckling. The action of the break is shown:

We extract the most informative frame images from frames 11650 to 11760 of the high resolution version of the WTC2 compilation video here. This corresponds to the 4 second interval, 6:29 to 6:33 in the video. The high resolution download is here

These images show:

1) Increased inward bending until frame 11070

2) The visible columns become straight again after that point. This means that the tension that caused the columns to bend has disappeared. The upper columns have broken, or "snapped" from the lower visible columns.

3) The visible columns were never bent past their elastic limit before "snapping" from the upper columns. The bending caused little permanent deformation and the columns quickly straightened up again when the cause of tension was removed.

Part 2 of this presentation, using other portions of the same video compilation linked earlier, will show

4) When this lower sheet of columns fell away from the building a few moments later, it's entire upper edge was clearly visible from multiple angles, showing that the break between upper and lower happened completely along bolt lines in a zig-zag pattern over 3 floors.

All columns along the top edge appeared very straight as they fell from the building. There was no evidence of a single buckled columns along the top edge of the falling sheet.

All images are in chronological order.


Frame 11653


frame 11659


frame 11665


frame 11671


frame 11679


frame 11690


frame 11695


frame 11702

In the image above the bending reaches a maximum inward displacement.

In the following images we see the visible columns quickly straighten.

There is no longer the evidence of increased inward bending. Instead, there is a release of tension as the visible columns break away from their connections above.

Please observe as the visible columns return to their former (straight) shape.

frame 11707


frame 11716

The image below shows the columns once again quite straight.

As they return to their former shapes and positions we see an open space, a empty hole is left where the upper columns once were.


frame 11736


frame 11741

In the last image in our short but educational presentation we see the camera has zoomed out allowing us to see how the upper sheet of columns has folded into the building and inside the lower straight visible columns.

Notice the obvious difference in angle between the upper and lower right corners of the building. The upper part is folding within the lower part.

frame 11756

Part 2 of this presentation will identify the line along which the east perimeter "snapped" into upper and lower. I will show that it was a clean, unbuckled break completely along bolt lines.

The two images below, of the top edge of the lower sheet moving outwards, show a small taste of what the type of break I mean. The first image shows how clean and unbuckled the break was, while the second image hints that the pattern stretched across the entire east face, from the NE to the SE corners of the building.


The upper edge of the sheet is marked in the graphics:

It is the first stepped pattern of bolted connections above the 75-77 Stiff MER panels.

The orange line marks a row of welded and bolted conections. They prove much stringer than the connections along the stepped pattern shown.

Here is a simple gifanimation capturing the basic behaviour of the columns as the bolt seam fails...

Action of the entire east face of WTC2 after the initial break can be seen here

Created on 07/25/2009 08:20 PM by admin
Updated on 10/07/2012 10:32 PM by admin
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