Reports of the Federal Building and Fire
Investigation of the World Trade Center Disaster

---

NIST NCSTAR 1-5: Reconstruction of the Fires in the World Trade Center Towers

The collapses of the World Trade Center towers on September 11, 2001, resulted from a combination of aircraft impact damage and the ensuing fires. This report documents:

1. The information obtained on the factors that affected the nature, duration, and location of the fires and how this was obtained;
2. The development and validation of the fire model used to simulate the fires;
3. Descriptions of the most likely fires, as they were reconstructed; and
4. The modeling and validation of the heat transfer from the fires to the buildings’ structural
   members.

• NIST NCSTAR 1-5: Reconstruction of the Fires in the World Trade Center Towers
  • NIST NCSTAR 1-5A: Visual Evidence, Damage Estimates, and Timeline Analysis (Chapters 1-8)
  • NIST NCSTAR 1-5A: Visual Evidence, Damage Estimates, and Timeline Analysis (Chapters 9-Appendix C)
    • 1-5A appendixes D-G
    • 1-5A  appendixes H-M
  • NIST NCSTAR 1-5B: Experiments and Modeling of Structural Steel Elements Exposed to Fire
  • NIST NCSTAR 1-5C: Fire Tests of Single Office Workstations
  • NIST NCSTAR 1-5D: Reaction of Ceiling Tile Systems to Shocks
  • NIST NCSTAR 1-5E: Experiments and Modeling of Multiple Workstations Burning in a Compartment
  • NIST NCSTAR 1-5F: Computer Simulation of the Fires in the World Trade Center Towers
  • NIST NCSTAR 1-5G: Fire Structure Interface and Thermal Response of the World Trade Center Towers

 

	For additional information: WTC Contacts  |  Building and Fire Research Laboratory |  NIST
	Privacy Policy  /  Security Notice  /  Accessibility Disclaimer  |  FOIA  |  Information Quality  |  About NIST NIST is an agency of the U.S. Department of Commerce

Last updated:  November 2008