The National Institute of Standards and Technology (NIST) has submitted to Congress the annual report of activities under the National Construction Safety Team (NCST) Act, which authorizes the agency to conduct technical investigations of major building failures in the United States. Although NIST did not conduct any new investigations of structural failures during the past year, the 2007 NCST report details significant progress in both the private and public sectors acting upon NIST’s previous investigation-driven recommendations for improvement in building and fire standards, codes and practices.
Those recommendations stem from NIST’s investigations into the failure of the two World Trade Center (WTC) towers following the terrorist attacks of Sept. 11, 2001, and The Station nightclub fire in Rhode Island on Feb. 20, 2003, that killed 100 persons. NIST expects this summer to complete its investigation of the failure of WTC 7, the 47-story office building that also collapsed on 9/11.
The report highlights a discussion of the first comprehensive set of building code changes based on the NIST WTC investigation that were approved by the International Code Council (ICC) in 2007 and were incorporated into last year’s supplement to the ICC’s International Building Code (IBC), a model code used as the basis for building regulations promulgated and enforced by U.S. state and local jurisdictions. Those jurisdictions have the option of incorporating some or all of the code’s provisions but generally adopt most of them.
The report also details the 47 proposals for code changes based on WTC investigation recommendations submitted to the ICC last August. These proposals address areas such as structural collapse, wind tunnel testing, emergency responder communications, sprinkler redundancy and sprayed-on fire resistive materials. All 47 items will be considered initially during this month’s ICC Code Development Hearings for potential forwarding to the ICC Final Action Hearing in September. Code changes approved at that time will appear in the 2009 edition of the IBC.
NIST investigations under the NCST Act, signed into law in October 2002, are designed to establish the likely technical causes of the building failure and evaluate the technical aspects of emergency response and evacuation procedures in the wake of such failures. The goal is to recommend improvements to the way in which buildings are designed, constructed, maintained and used.