Dynamic Evaluation of Thermoplastic Roofing System for Wind Performance

Baskaran, A.; Lee, W.; Richardson, C.

doi:10.1061/(asce)1076-0431(1999)5:1(16)

“…All resistance links should remain connected for the assembly to be durable and to keep the roof properly in place. Existing studies in the literature focused on the wind uplift resistance evaluation of MAS with different membranes -Assemblies with PVC membranes (Baskaran and Lei, 1997), Assemblies with modified bituminous membranes (Chen and Baskaran, 1998) and Assemblies with TPO membranes (Baskaran, Lei and Richardson, 1999). However, no studies exist in the literature documenting the performance of FBA.…”

Section: Loose Laid Spr (Ballasted Configuration)mentioning

confidence: 99%

Impact of air intrusion on the wind uplift performance of fully bonded roofing assemblies

Baskaran

¹

,

Molleti

²

2009

Construction and Building Materials

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10. 1016/j.conbuildmat.2008.04.010 Construction and Building Materials, 23, 2, pp. 889-901, 2009-02-01 Impact of air intrusion on the wind uplift performance of fully bonded roofing assemblies Baskaran, B. A.; Molleti, S.; Sexton, M. The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 Impact of Air Intrusion on the Wind Uplift Performance of FullyBonded Roofing Assemblies ABSTRACTWind performance investigation is critical in the design of durable roofing assemblies. In North America, mainly two types of low slope roofs, conventional and inverted, are in practice depending on the placement of the membrane in the assembly. As part of the conventional low-sloped roofs, in a Fully Bonded Assembly (FBA) the insulation is mechanically attached and waterproof membrane is bonded to the insulation using adhesives. Recent field investigations of roof failures after major hurricanes indicated that FBA are susceptible to high wind events. To understand the response of the FBA under dynamic environment, an extensive experimental study has been carried out by the SIGDERS -Special Interest Group for Dynamic Evaluation of Roofing Systems, at the National Research Council. The present study focuses on the impact of air intrusion on wind uplift performance of these assemblies. Airflow control is usually achieved by including a barrier/retarder in the roofing assembly. Assembly with barrier improved the wind uplift rating by two fold when compared to an assembly without barrier. Use of staggered insulation arrangement can provide similar air retarding effect as a barrier...

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“…All resistance links should remain connected for an assembly to be durable and to keep the roof properly in place. Existing studies in the literature focused on the wind uplift resistance evaluation of MAS with different membranes -Assemblies with PVC membranes (Baskaran and Lei, 1997), Assemblies with modified bituminous membranes (Chen and Baskaran, 1999) and Assemblies with TPO membranes (Baskaran, Lei and Richardson, 1999). However, no studies exist in the literature documenting the performance of the FBA.…”

Section: Loose Laid Spr (Ballasted Configuration)mentioning

confidence: 99%

Wind performance evaluation of fully bonded roofing assemblies

Baskaran

¹

,

Molleti

²

,

Sexton

³

2008

Construction and Building Materials

Self Cite

View full text Add to dashboard Cite

/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1016/j.conbuildmat.2006.08.011 & Building Materials, 22, 3, pp. 343-363, 2008-03-01 Wind performance evaluation of fully bonded roofing assemblies Baskaran, B. A.; Molleti, S.; Sexton, M. Constructionhttp://irc.nrc-cnrc.gc.caWind performance evaluation of fully bonded roofing assemblies NRCC-45613Baskaran, A.; Molleti, S.; Sexton, M.A version of this document is published in / Une version de ce document se trouve dans: Construction and Building Materials, v. 22, no. 3, March 2008, pp. 343-363 doi: 10.1016/j.conbuildmat.2006 The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 Wind Performance Evaluation of Fully Bonded Roofing Assemblies ABSTRACTWind performance investigation is critical in the design of durable roofing assemblies. In North America, mainly two types of low slope roofs, conventional and inverted, are in practice depending on the placement of the membrane in the system. The present study focuses on the wind uplift performance of fully bonded single ply roofing assembly. Past studies focused on the wind uplift resistance evaluation of Mechanically Attached Systems (MAS) with different waterproofing membranes. However, no studies exist in the literature documenting the performance of fully bonded assembly (FBA). Recent field investigations of roof failures after major hurricanes indicated that these assemblies are equally susceptible to high wind events. The present study investigated three parameters that could influence the wind uplift performance of the FBA namely, curing time of the assembly, bonding strength between the membrane and i...

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“…Systems, which varied in membrane types, layout, and configurations, were subjected to static and dynamic load cycles. Based on this extensive study, it can be said that SIGDERS brought the benefit of dynamic testing to the roofing community [3].…”

Section: Development Of a Facilitymentioning

confidence: 99%

A New Facility to Simulate Simultaneous Wind and Thermal Effects on Roofing Systems

Baskaran¹,

Liu²,

Weng³

et al. 2003

Journal of Testing and Evaluation

4

0

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. Testing and Evaluation, 31, 4, pp. 1-10, 2003-07- Journal of ABSTRACTRoofing systems are exposed to wind pressures and thermal stresses. Through a North American roofing consortium (Special Interest Group for Dynamic Evaluation of Roofing Systems -SIGDERS) the National ResearchCouncil Canada fabricated a facility to evaluate roof assemblies under simultaneous wind and thermal effects. The overall objective of this paper is to present the commissioning process of the facility based on experimental investigations that were carried out on a single-ply roofing system with a PVC membrane. For this study, roofing system responses were measured under simulated simultaneous wind and heat/cold conditions. A systematic attempt also was made to quantify the system response and to characterize the membrane properties. This was performed on a cold-conditioned system as well as by subjecting the membrane samples to the same cold-conditioning program in a laboratory freezer. Membrane samples were characterized by mechanical and chemical methods. Comparison of laboratory-conditioned membranes and wind-tested systems revealed the effects of cold conditioning and wind loading. Neither the wind uplift nor the mechanical properties (tensile breaking strength, elongation at break, tear strength, and seam strength) nor the chemical properties (glass transition temperature and weight loss) were affected by the selected cold conditioning. Based on these findings, directives for further studies are presented for this on going project.

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Dynamic Evaluation of Thermoplastic Roofing System for Wind Performance

Cited by 25 publications

References 4 publications

Impact of air intrusion on the wind uplift performance of fully bonded roofing assemblies

Impact of air intrusion on the wind uplift performance of fully bonded roofing assemblies

Wind performance evaluation of fully bonded roofing assemblies

A New Facility to Simulate Simultaneous Wind and Thermal Effects on Roofing Systems

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