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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

Core columns had bolted connections above fl 85

Core columns had bolted connections above fl 85

Evidence for bolted connections for all core column H beams in the WTC1 collapse initiation region:


From pg 48 of a WTC1 inspection

Core corner columns inspected from office area floorsâ€"Core corner columns were inspected at all four corners of the 92nd to 93rd floors and at three corners at the 77th to 78th floors. All seven locations were inspected by removing the five or more layers of gypsum wallboard around the splice locations, which were 3 ft 0 in. above the finished floor level.
On the 92nd to 93rd floors, all four splices were bolted connections. No defects were found at any of the bolted splices. Welded splices were found at all three locations on the 77th to 78th floors, and were tested using the dye penetrant method. Results from the tests showed that there were no surface cracks in the welds. Steel plates, bolts, and welds that were visible were found to have only light surface corrosion.

Pg 39
Core columns inspected from office area floorsâ€"Quality Assurance personnel inspected core corner columns at eight splice locations (see Table B6 in the survey report for locations). Seven of the splices were welded, and the welds were tested using the ultrasonic and magnetic particle methods. The eighth Chapter 3 Draft for Public Comment 40 NIST NCSTAR 1-1C, WTC Investigation
location was a bolted splice connection. No defects were found in any of the welded splices. Steel
columns exhibited light surface corrosion, as did the bolted splice on the bolts and splice plates.

The pg 48 quote verifies that all four corner columns on floor 92 were bolted, not welded.

We can also look at the NIST steel inventory for bolted splice plates. From NIST NCSTAR 1-3B:

C-65 (s-8) (904A: 86â€"89) and C-60. Notice the remains of bolted splice plates at the ends of the H beams. (left click to see the full image)

g) C-155 (904A: 83â€"86), notice the splice plate and bolts at the far end.

h) HH (605A: 98â€"101), This splice plate is from the 98th floor of WTC1. It is held to each beam by only 4 bolts in each plate.

c) C-30 (1008B: 104â€"106)


C-80 (WTC1 603A, 92-95), notice the bolt holes.

Left click to see the full image. The same column below:


From the NIST steel inventory and excerpts from an inspection report we know that the following CC connections are bolted splices:

The 4 core corner columns 501, 508, 1001 on the 92nd floor and

1008 on the 92, 104 and 106 floors

904 on the 83, 86 and 89 floors

605 on the 98th floor

603 on the 92 and 95th floors

and we see no evidence of welded H beam connections above the 86th floor. It is reasonable to assume that all H beam connections in the collapse initiation area of WTC1 were bolted splice connections.

From the available literature we discovered that there is a horizontal plane on the 98th floor right through the core where all core columns naturally break in two if the connecting bolts are removed. Every 114+ story core column is already "cut" at the 98th floor. All one need do is remove the top bolt connectors and push the top part over a little, taking advantage of existing "cuts" by manipulating (removable) bolt connections.
Here is a picture of a typical bolted splice connection along a typical H beam.

In this case the plates are welded to the lower column section, For WTC1 they were bolted.

If a demo team had access to such connections it would be rather dumb of them not to exploit them.

Why nuke the building or attack it with space beams if you can just knock the top H beam sections off the bottom ones in the collapse initiation region?

Why cut steel when you don't have to?

How many simple ways can you think of to knock the top column section off the bottom one with minimal force? Why not just remove a few bolts with a wrench? Why not all of them?

My point is that it doesn't require a genius to figure out how to initiate the WTC1 collapse. No nukes or space beams required.

All core column bolted connections in the collapse initiation zone are on floors 89, 92, 95, 98, 101, 104 about 3 feet above the flooring. These are the natural targets so it is important to carefully look for unusual activity on these floors during the 30 minutes leading up to collapse.


Created on 10/15/2010 06:53 AM by admin
Updated on 05/15/2011 07:04 AM by admin
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