Fire Resistance Tests of Non-Insulated Walls with Parallel and Perpendicular Orientation of Gypsum Board

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TypeTechnical Report
Series titleResearch Report (National Research Council Canada. Institute for Research in Construction); no. RR-188
Physical description31 p.
AbstractThis report presents the results of six fire resistance tests of non-insulated loaded and unloaded wall assemblies constructed with the gypsum wallboard applied parallel to the framing members in two of the assemblies and perpendicular to the framing in the other four assemblies. The objective of the tests was to determine the significance of the orientation of the gypsum board (parallel versus perpendicular) to the studs on the fire resistance of both loaded and unloaded walls. The average fire resistance of unloaded walls with a parallel orientation of the gypsum boards was found to be 28 min and that of walls with perpendicular orientation was 30 min. The fire resistance of loaded wall assemblies was 23 min for parallel orientation and 26 min for perpendicular orientation of gypsum boards. These results show that the orientation of the gypsum board had a minimal effect on the fire resistance. The cracked sections of gypsum board tended to fall off earlier in the walls with gypsum boards applied parallel to the studs, resulting in slightly reduced fire resistance and a greater extent of charring.
Publication date
PublisherNational Research Council Canada
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC numberNRC-IRC-16776
NPARC number20378070
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Record identifier905892c2-4c23-42ad-af2e-137a1511f065
Record created2012-07-24
Record modified2017-06-14
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