Scientists, Scholars, Architects & Engineers respond to NIST

There are also several seemingly contradictory issues between the FEMA Building Performance Study Appendix C and the NIST WTC 7 Report, for which no explanations have been provided, and they are:

• NIST states “No steel was recovered from WTC 7″ while FEMA section C.2 shows that at least one piece of WTC 7 steel was tested, with the results being alarming, considering the highly unusual formation of a liquid eutectic, intergranular melting, and erosion. Features not seen before, by the experienced investigators, in steel subject to common office fires.
• FEMA section C.3 Summary for Sample 1 states that the steel was heated to around 1,000° C. (1,800° F.), which is much hotter than the steel temperatures NIST is claiming to have caused the collapse, and seemingly far outside the ability of office fires to heat the steel. Additionally, this section states that steel liquefied at these temperatures, due to the formation of the eutectic, which would dramatically lower the usual 2750° F melting point temperature of the steel.
• FEMA Section C.6 Suggestions for Future Research states “It is also possible that the intergranular melting, eutectic formation, and erosion phenomenon started prior to collapse and accelerated the weakening of the steel structure.”