Post-Construction Modifications to Fire Protection, Life Safety, and Structural Systems of World Trade Center 7. Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-1I) ***DRAFT for Public Comments***

Published

September 1, 2005

Author(s)

R A. Grill, D A. Johnson, D A. Fanella

Abstract

This report was prepared to support the analysis of building and fire codes and standards of the National Institute of Standards and Technology World Trade Center (WTC) Investigation. This report was prepared to support the overall objective of determining how and why WTC 7 collapsed. The purpose of this report is to document modifications and/or repairs of the fire protection, life safety, and structural framing systems of WTC 7.

Citation

National Construction Safety Team Act Reports (NIST NCSTAR) - 1-1

Report Number

1-1

NIST Pub Series

National Construction Safety Team Act Reports (NIST NCSTAR)

Pub Type

NIST Pubs

Download Paper

Local Download

Keywords

World Trade Center, high rise buildings, building collapse, disasters, terrorists, terrorism, fire safety, fire investigations, construction, fire protection, life safety, structural systems, beams, fire alarm systems, sprinklers, floors, slabs (members), egress, pressurization, communication networks

Citation

Grill, R. , Johnson, D. and Fanella, D. (2005), Post-Construction Modifications to Fire Protection, Life Safety, and Structural Systems of World Trade Center 7. Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-1I) ***DRAFT for Public Comments***, National Construction Safety Team Act Reports (NIST NCSTAR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=908963 (Accessed October 10, 2025)