Reply #25: Yes, that guy is sampling steel.

[petgoat]

Your first link says they recovered 150 pieces.

Your second link to the FEMA Appendix C citing high temperatures in
the steel is asserted in Jim Hoffman's site to show evidence of
explosives because of the magnitude of the oxidative attack and the
presence of high amounts of non-native sulfer.

I suppose the WTC tower sample from the Appendix C is the one NIST
refers to when it says that one of its 3 (out of 170) samples of
perimeter columns that showed evidence of heating above 250 degrees C
they considered to have experienced its heating in the context of
being cooked after the collapse.

NIST does not have any core steel showing heating above 250 degrees C.
And of their perimeter column samples, only 2 of 170 show heating
above 250 degrees C. Now supposedly these guys were looking for the
steel that showed what happened. But they didn't get it. Why not?

They were lazy? There was no heating above 250? Somebody took the
pieces that showed what happened?

The FEMA Appendix C report you cited expressed the wish that the
researchers be allowed to do further study of mysterious oxidative
erosion and the mysterious sulfer. Does anyone know if they ever did
a followup report?