Fire Performance of Houses. Phase I. Study of Unprotected Floor Assemblies in Basement Fire Scenarios. Part 6 - Results of Tests UF-07 and UF-08 (Metal-Web Wood Trusses)

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DOIResolve DOI: http://doi.org/10.4224/20377869
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TypeTechnical Report
Series titleResearch Report, NRC Institute for Research in Construction; Volume 251
Physical description106 p.
SubjectFloors
AbstractThis report documents part of the research project involving a series of full-scale fire experiments in a test facility that simulated a two-storey single-family house with a severe, fast growing fire originating in an unfinished basement to study the fire performance of the floor/ceiling assembly constructed over the basement. The report presents the results and analysis of Test UF-07 and Test UF-08 carried out in the test house with an unprotected metal-web wood truss floor/ceiling assembly above the basement. The two tests were identical except for the state of the door in the doorway leading from the first storey to the basement, which was absent in Test UF-07 (i.e., completely open basement doorway) and completely closed in Test UF-08 (i.e., closed basement doorway). A number of measurements were taken at various locations during the tests such as temperatures, smoke alarm activation times, smoke optical density, floor deflection and concentrations of CO, CO2 and O2. For Test UF-07, untenable conditions on the upper storeys were reached before structural failure of the test floor assembly. While for Test UF-08, untenable conditions for occupants of average susceptibility on the upper storeys were reached after structural failure of the test floor assembly. The results showed that closing the door to the basement delayed the structural failure of the unprotected floor assembly as well as the onset of untenable conditions on the upper storeys.
Publication date
PublisherNational Research Council Canada
LanguageEnglish
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
IdentifierRR-251
NRC number19385
NPARC number20377869
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Record identifierf0d576c9-b383-4bd1-b8fa-b1a2c4f04523
Record created2012-07-24
Record modified2017-05-23
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