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A novel approach to estimate the wind uplift resistance of roofing systems

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/j.buildenv.2008.06.024
AuthorSearch for: 1; Search for: 1; Search for: 1
Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
Subjectsteel decks, tensile strength, fasteners, pullout resistance, wind uplift, dynamic testing, design alternatives; Wind loads
Abstract
This paper presents a novel approach to estimate wind uplift resistance when components are substituted during field application. Wind dynamics, on a mechanically attached single ply roofing assembly, lift the membrane and cause fluttering, introducing stresses at the attachment locations. In such assemblies, the fastener deck interface is a critical design factor. First, by taking steel deck as a component this paper systematically characterize the various steel decks that are commonly used in low slope application. Second component, namely the fasteners and its engagement strength with deck have been quantified for variations of its design, size and sources. Based on this component characterization, fastener pullout resistance (FPR) is identified as a verification factor for system wind resistance estimation. When variations occur in the fastener-deck interface between the proposed and the existing configurations, the present research through case studies has proved that: 'as long as the FPR of the proposed configuration is higher than the existing configuration then wind uplift ratings can be maintained'. This is valid as long as both the configurations have all the remaining roofing components similar with comparable layout. Based on this verification, the study recommends that the testing lab should report the FPR along with the wind uplift resistance such that FPR can be used as a verification factor to accept design/field alternatives.
Publication date
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  • Building and Environment 44, no. 4 (1 April 2009): 723–735.
LanguageEnglish
Peer reviewedYes
NRC numberNRCC 48177
NRC-IRC-19353
NPARC number20378058
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Record identifiere9084f36-9a4b-4bc7-b0a8-13784017b41d
Record created2012-07-24
Record modified2020-04-16
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