Snow loads on two level flat roofs

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ConferenceProceedings of the Eastern Snow Conference 41st Annual Meeting: 07 June 1984, Washington, D.C., USA
Pages313; # of pages: 11
SubjectRoofing; snow loads; flat roofs; snow drifts; building codes; Snow and Ice loads
AbstractBetween 1967 and 1982, snow loads were recorded on five two- level flat-roofed buildings in Ottawa as part of a Canada- wide survey. Preliminary analysis of the data indicates that the average snow density on flat roofs is 0.295, about 15% higher than that on the ground, 0.257, while the recommended values in the National Building Code of Canada are 0.245 and 0.20 respectively. The sizes of the snow drifts and the drift loads were within the design recommendations of the Code. The lengths of drifts were less than twice the difference in elevation between the upper and lower roofs.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number24905
NPARC number20386108
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Record identifier4c6610f0-3bf7-4bdd-ad9b-9908107a54f9
Record created2012-07-25
Record modified2016-05-09
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