Grit1645

Nov 10 2008, 09:12 PM

Miragememories

Nov 10 2008, 06:09 PM

The NIST WTC7 Final Collapse Report makes frequent reference to the WTC7 Design Plans, so you have to assume the NIST is trapped in a foolish lie, or they actually have the plans as they claim.

I accept they have the plans but Grit1645, you are welcome to distrust the NIST all you want.

In 2004, the NIST unequivocally stated most of the beams and [floor]girders had sheer studs.

The only other comment was specifically about many of the core girders which the NIST indicated did not show shear studs in the design drawings.

This is a really important, because the NIST placed special importance on the existence, or lack of, those shear studs.

The NIST, without explanation, removed "and girders" when they re-issued the original statement; "Most of the beams and girders were made composite with the slabs through the use of shear studs." in 2008.

Well I contend that the real reason lies in their closing statements;

From NIST_NCSTAR_1-9_vol2_for_public_comment
"Additional factors that contributed to the failure of the critical north-south girder were (1) the absence of shear studs that would have provided lateral restraint."

"Of particular concern are the effects of thermal expansion in buildings with one or more of the following features:
(4) shear studs that could fail due to differential thermal expansion in composite floor systems, and (5) lack of shear studs on girders."

I believe the argument for non-core girders having shear studs has not been contradicted.

MM

Where did I ever say that NIST didn't have the plans? You are the one that distrusts the NIST completely. Clearly they would not have gotten too far without the building plans.

And obviously these report comments are adequate proof for you that there WERE studs and that NIST then denied it. Sorry if it offends you that this is NOT adequate proof for ME.