Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Comparison of Codes, Standards and Practices in Use at the Time of the Design and Construction of World Trade Center 1, 2 and 7. Federal Building and Fire Safety Investigation of the World Trade Center Disaster (NIST NCSTAR 1-1E) ***DRAFT for Public Comme



J C. Razza, R A. Grill


This report was prepared to support the goals and objectives of the analysis of building and tire codes and practices of the National Institute of Standards and Technology World Trade Center (WTC) Investigation. The report provides a comparison and summary of significant differences between the 1968 Building Code of the City of New York (determined to be the current building code at the time of construction of WTC 1 and WTC 2), the provisions of the New York State Building Construction Code, and the City of Chicago Building Code that were available at that time.
National Construction Safety Team Act Reports (NIST NCSTAR) - 1-1
Report Number


World Trade Center, high rise buildings, building collapse, disasters, terrorists, terrorism, codes, standards, building design, building codes, building construction, fire safety, fire investigations, power supplied, fire alarm systems, fire protection, fire suppression, interior finishes, egress, sprinklers, standpipes, fire dampers, smoke dampers, firestops, water supply, elevators (lifts), venting
Created September 1, 2005, Updated February 19, 2017