Council on Tall Buildings and Urban Habitat
The CTBUH Comments on the “Structural Fire Response and Probable Collapse Sequence of World Trade Center Building 7 August 2007” Prepared and Issued by NIST
 
CTBUH Comments on NIST WTC7 Collapse Report
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Principal Authors: David Scott (CTBUH / Arup), Simon Lay (WSP) & Daniel O'Connor (Schirmer Engineering)
Published by CTBUH, Chicago, October 2008
Free to download

In August 2008, NIST issued their report on the Structural Fire Response and Collapse Sequence of World Trade Center Building 7, for Public Comment. This brief report contains feedback from the Council on Tall Buildings and Urban Habitat on the NIST report. The Council’s key interest in the NIST study is an understanding of the collapse sequence and one of NIST's key objectives, which was to "identify, as specifically as possible, areas in the current building and fire codes, standards and practices that warrant revision.”

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Table of Contents

  
1. Introduction

 6. Structural Analysis and the Cause of Failure
    (Chapters 11-13)
2. Background
 7. Summary and Recommendations (Chapter 14)
3. Initiating Event Hypothesis (Chapter 8) 8. Performance Based Design
4. Fire Analysis and Simulations (Chapter 9) 9. NIST Recommendations
5. Structural Heating (Chapter 10) 10. CTBUH Conclusions