Fire resistance of loadbearing LSF assemblies

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Conference15th International Specialty Conference on Cold-Formed Steel Structures: 19 October 2000, St. Louis, Missouri
Pages545561; # of pages: 17
Subjectfire resistance; cold-formed steel; gypsum board; Walls
AbstractThis paper presents an analytical thermal-structural model for loadbearing lightweight steel framed (LSF) walls exposed to fire on one side. The model reflects temperature and deformation data from six standard fire resistance tests conducted recently by the National Research Council of Canada in partnership with the North American steel industry. Some characteristic patterns in thermal transmission and structural behaviour are discussed. Temperature histories across LSF assemblies are simulated numerically by explicit integration of transient heat transfer equations. The apparent thermal properties are calibrated for gypsum board and three types of insulation. Analytical procedures are presented to simulate lateral deformation histories and predict structural failure times. The model illustrates how different heating regimes in cold formed steel studs cause different structural failure modes.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number41533
NPARC number20331355
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Record identifier72307ab9-d020-4462-8942-c33af1b3c23b
Record created2012-07-18
Record modified2016-05-09
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