ANSI - American National Standards Institute
 Print this article  Previous Next 

NIST Investigators Say WTC Steel Met Standards

New York, Aug 28, 2003

According to an August 27, 2003, article from the Associated Press, a new report from the National Institute of Standards and Technology (NIST) suggests that the steel beams inside the World Trade Center's Twin Towers met or were stronger than design standard requirements. Officials have tested some of the 236 pieces of steel from the debris, and while they maintain the report is preliminary and more testing is planned, they are confident that these initial assessments will be confirmed.

The steel beams used to build the WTC were typical of materials in the 1960s when the towers were erected. The beams did exceed requirements to bear 36,000 pounds per square inch, and were often capable of bearing around 42,000 pounds per square inch.

The steel testing is part of NIST’s $16 million, two-year federal building and fire safety investigation into the structural failure and subsequent collapse of WTC Buildings 1 and 2 and WTC Building 7. The investigation will focus on the building construction, the materials used and all of the technical conditions that contributed to the outcome of the WTC disaster.

In coming months, NIST will re-create sections of the building's floor trusses and conduct large-scale fire endurance tests to determine how the floors of the towers responded to the twin stresses of impact by a jet plane and a continuing fire.

More information on the NIST investigation may be found at may be found at

Standards Portal