Fire resistance of unprotected steel columns

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Journal titleJournal of the Structural Division, ASCE
Pages837852; # of pages: 16
Subjectposts (structures); structural steel; fire resistance; fire resistance tests; standards; Performance of:; poteau (ossature); acier de construction; resistance au feu; essai de resistance au feu; norme (document)
AbstractFire resistance of unprotected steel columns is examined by standard fire test and numerical analyses based on a 1,000 D F (538 D C) critical temperature for failure. It is shown that fire resistance time varies with the shape factor of column weight divided by the heated perimeter, and two simple equations for calculating the fire resistance times of unprotected steel columns are established. A practical example shows that large columns used in high-rise buildings can have fire resistance times of up to one hr. The more conservative of the two equations is recommended for use in building standards.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number13589
NPARC number20358546
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Record identifier70724174-bb3b-411a-aab0-0320464c005d
Record created2012-07-20
Record modified2016-05-09
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