Research Article
May 1973
Fire Resistance of Unprotected Steel Columns
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VIEW THE REPLYAuthors: W. W. Stanzak and T. T. LieAuthor Affiliations
Publication: Journal of the Structural Division
Volume 99, Issue 5
Abstract
Fire 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.
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Published In
Journal of the Structural Division
Volume 99 • Issue 5 • May 1973
Pages: 837 - 852
Copyright
© 1973 American Society of Civil Engineers.
History
Published in print: May 1973
Published online: Feb 1, 2021
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W. W. Stanzak
Steel Industries Fellow, Fire Research Sect., Div. of Building Research, National Research Council of Canada, Ottawa, Canada
T. T. Lie
Research Officer, Fire Research Sect., Div. of Building Research, National Research Council of Canada, Ottawa, Canada
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