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Snow loads on sloping roofs: Two pilot studies in the Ottawa area

From National Research Council Canada

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Affiliation
  1. National Research Council of Canada. NRC Institute for Research in Construction
FormatText, Article
SubjectRoofing; snow loads; roofs; slope; surface texture; farm roofs; ottawa, ontario, canada location; snow accumulation; surface roughness effects; slope effects; unheated experimental roofs; sliding snow; snow depths; densities; pilot survey; Snow and Ice loads; Couvertures; charge de neige; toiture; pente; aspect de surface
Abstract
The results of two pilot studies are presented: one concerning snow on farm roofs in the Ottawa area carried out in 1966, and the other an eight-winter investigation of the influence of surface roughness and slope on snow accumulation on nine 2.4 m X 2.4 m unheated, north-facing experimental roofs built in a sheltered woods at the National Research Council Canada in Ottawa. The results indicate a trend towards reduced snow density as slopes increase and a smaller accumulation of snow on smooth ( metal) surfaces than on rough shingled roofs as slopes increase. More data on full-sized roofs across Canada are required to verfy this. It is suggested that a less conservative slope-reduction relation might be considered for smooth roofs in the Ottawa area and for other areas with similar climate.
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  • Canadian Journal of Civil Engineering 12, no. 2 (June 1985): 334–343.
LanguageEnglish
Peer reviewedYes
IdentifierDBR-P-1282
NRC numberNRCC 24432
NRC-IRC-3491
NPARC number20375581
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Record identifierff2054f2-cc56-4d58-b1ac-0c436158c651
Record created2012-07-23
Record modified2020-06-06
Date modified: