Effect of roof-edge parapets on mitigating extreme roof suctions

Wimal Suaris, Peter Irwin

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Very high intermittent suctions have been found to occur near corners of low rise building roofs. This paper investigates the effectiveness of parapets mounted at the roof-edge on mitigating these high suctions. The study included full perimeter parapets, both solid and perforated and parapets placed only at the ridge and the corner zones. The parapets used in the study had a 0.2. m full scale height which is more feasible for installation on typical homes than the taller parapets that have been considered in previous studies. The peak pressure coefficients in the corner zone were reduced by over 50% with the solid and perforated parapets placed along the perimeter of the building. Perforated parapets with a perforation ratio of 33% and having a length of 10% of the building dimension at the corners and at the ridge performed best resulting in about a 60% reduction in the peak pressure coefficients at the corners.

Original languageEnglish
Pages (from-to)483-491
Number of pages9
JournalJournal of Wind Engineering and Industrial Aerodynamics
Volume98
Issue number10-11
DOIs
StatePublished - Oct 1 2010

Fingerprint

Roofs

Keywords

  • Gable roof
  • Low-rise buildings
  • Parapets
  • Pressure coefficients
  • Suction
  • Wind loads

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Civil and Structural Engineering
  • Mechanical Engineering

Cite this

Effect of roof-edge parapets on mitigating extreme roof suctions. / Suaris, Wimal; Irwin, Peter.

In: Journal of Wind Engineering and Industrial Aerodynamics, Vol. 98, No. 10-11, 01.10.2010, p. 483-491.

Research output: Contribution to journalArticle

@article{0e060f84c2ea49c2bc1ce4440874ce3f,
title = "Effect of roof-edge parapets on mitigating extreme roof suctions",
abstract = "Very high intermittent suctions have been found to occur near corners of low rise building roofs. This paper investigates the effectiveness of parapets mounted at the roof-edge on mitigating these high suctions. The study included full perimeter parapets, both solid and perforated and parapets placed only at the ridge and the corner zones. The parapets used in the study had a 0.2. m full scale height which is more feasible for installation on typical homes than the taller parapets that have been considered in previous studies. The peak pressure coefficients in the corner zone were reduced by over 50{\%} with the solid and perforated parapets placed along the perimeter of the building. Perforated parapets with a perforation ratio of 33{\%} and having a length of 10{\%} of the building dimension at the corners and at the ridge performed best resulting in about a 60{\%} reduction in the peak pressure coefficients at the corners.",
keywords = "Gable roof, Low-rise buildings, Parapets, Pressure coefficients, Suction, Wind loads",
author = "Wimal Suaris and Peter Irwin",
year = "2010",
month = "10",
day = "1",
doi = "10.1016/j.jweia.2010.03.001",
language = "English",
volume = "98",
pages = "483--491",
journal = "Journal of Wind Engineering and Industrial Aerodynamics",
issn = "0167-6105",
publisher = "Elsevier",
number = "10-11",

}

TY - JOUR

T1 - Effect of roof-edge parapets on mitigating extreme roof suctions

AU - Suaris, Wimal

AU - Irwin, Peter

PY - 2010/10/1

Y1 - 2010/10/1

N2 - Very high intermittent suctions have been found to occur near corners of low rise building roofs. This paper investigates the effectiveness of parapets mounted at the roof-edge on mitigating these high suctions. The study included full perimeter parapets, both solid and perforated and parapets placed only at the ridge and the corner zones. The parapets used in the study had a 0.2. m full scale height which is more feasible for installation on typical homes than the taller parapets that have been considered in previous studies. The peak pressure coefficients in the corner zone were reduced by over 50% with the solid and perforated parapets placed along the perimeter of the building. Perforated parapets with a perforation ratio of 33% and having a length of 10% of the building dimension at the corners and at the ridge performed best resulting in about a 60% reduction in the peak pressure coefficients at the corners.

AB - Very high intermittent suctions have been found to occur near corners of low rise building roofs. This paper investigates the effectiveness of parapets mounted at the roof-edge on mitigating these high suctions. The study included full perimeter parapets, both solid and perforated and parapets placed only at the ridge and the corner zones. The parapets used in the study had a 0.2. m full scale height which is more feasible for installation on typical homes than the taller parapets that have been considered in previous studies. The peak pressure coefficients in the corner zone were reduced by over 50% with the solid and perforated parapets placed along the perimeter of the building. Perforated parapets with a perforation ratio of 33% and having a length of 10% of the building dimension at the corners and at the ridge performed best resulting in about a 60% reduction in the peak pressure coefficients at the corners.

KW - Gable roof

KW - Low-rise buildings

KW - Parapets

KW - Pressure coefficients

KW - Suction

KW - Wind loads

UR - http://www.scopus.com/inward/record.url?scp=77954955367&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954955367&partnerID=8YFLogxK

U2 - 10.1016/j.jweia.2010.03.001

DO - 10.1016/j.jweia.2010.03.001

M3 - Article

AN - SCOPUS:77954955367

VL - 98

SP - 483

EP - 491

JO - Journal of Wind Engineering and Industrial Aerodynamics

JF - Journal of Wind Engineering and Industrial Aerodynamics

SN - 0167-6105

IS - 10-11

ER -