Role of fire resistance issues in the first ever collapse of a steel framed building - WTC7

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ConferenceCIB World Building Congress 2004: 01 May 2004, Toronto, Ontario
Pages112; # of pages: 12
SubjectWorld Trade Center, WTC 7, Collapse, September 11, Fire Resistance; Performance of:
AbstractThe September 11th terrorist incidents have caused colossal destruction and significant damage to a number of buildings in the World Trade Centre (WTC) vicinity in New York. The catastrophic collapse of the twin towers has shocked the whole world and was attributed to two extreme events - impact of the aircraft and the ensuing fires. However, the collapse of WTC 7, a 47-storey building, has shocked everyone much more since this collapse was entirely due to fire. Further, this was the first ever collapse of a steel-framed building under fire. Thus, fire resistance issues played a major role in the collapse of the WTC 7.The role of fire resistance issues in the collapse of the WTC 7 building is discussed in this paper. An overview of the structural system and fire protection design features is presented. The effect of fire growth and fire intensity on the performance of structural systems is discussed. A review of the performance of steel-framed tall buildings in earlier fire incidents is presented. The different "fire and structural" conditions that existed in WTC 7, prior to the collapse that were crucial to the collapse, are highlighted.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number46279
NPARC number20386373
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Record identifierce6c2ee9-8060-48c3-8dd2-08d1545046d7
Record created2012-07-25
Record modified2016-05-09
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