World Trade Center 9/11 Investigation Could Result In New Generation Of Building Codes

May 2005

The International Code Council will use its code development process to address building safety and fire prevention code issues raised in the National Institute of Standards and Technology findings from its World Trade Center investigation.

International Code Council members last year approved a change to the International Building Code related to the World Trade Center collapse. The IBC now requires that buildings 420 feet and higher have a minimum three-hour structural fire-resistance rating. The previous requirement was two hours. The change provides increased fire resistance for the structural system leading to enhanced tenability of the structure and gives firefighters additional protection while fighting a fire.

The International Code Council updates its codes every three years through a governmental consensus process. Proposed code changes and comments on the proposals are accepted from anyone and everyone in public hearings. However, the final decision on code changes rests in the hands of the International Code Council’s governmental members, building and fire officials, who have no vested interest other than public safety.

As a result of the World Trade Center attacks and proposed code changes to address terrorism-related issues in the built environment, the International Code Council formed an Ad Hoc Committee on Terrorism Resistant Buildings. The committee—made up of code officials, engineers, architects and other building professionals—will look at the NIST report and its forthcoming recommendations, and other research.

The International Code Council also participates in an American Society of Mechanical Engineers task force to investigate the use of elevators in fires and other emergencies. This group began meeting following the World Trade Center attacks to examine the use of elevators for occupant exit and firefighter entry into burning buildings.