Predicting Roof Snow Loads on Gabled Structures
Publication: Journal of Structural Engineering
Volume 116, Issue 10
Abstract
Probabilistic models are developed from laboratory and field data to predict roof snow loads for cold slippery gabled roofs. The models account for the frequency and amount of snow sliding during an event by using actual measured probabilities. One model is based on temperature and precipitation and the other on degree‐hours and precipitation. Field data are obtained from three gabled roof structures with slopes of 10°, 30°, and 45° during the winter of 1986–1987. Additionally, artificial snow is deposited on small, gabled model roofs in the laboratory. Measured laboratory roof loads are related to prototype snow loads through similitude. Using simulation techniques, with the probabilistic models and 35 yr of meteorological data from the field site, 50‐yr mean recurrence‐interval roof snow loads are calculated and compared to published design standards. The simulated design roof snow loads for gabled structures are larger than those for comparable shed roofs. The standard‐specified design roof snow loads are conservative for the 30° and 45° roofs, and reasonable for 10° roofs.
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References
1.
“American national standard—Minimum design loads for buildings and other structures.” (1982). A58.1‐1982, Amer. Nat. Standards Inst., New York, N.Y.
2.
“American Society of Civil Engineers—Minimum design loads for buildings and other structures.” (1988). A58.1‐1988, ASCE–ANSI, New York, N.Y.
3.
Finney, D. J. (1962). Probit analysis: A statistical treatment of the sigmoid response curve. Cambridge University Press, New York, N.Y.
4.
Giever, P. M. (1987). “Predicting roof snow loads on gabled structures.” Thesis presented to the University of Idaho, at Moscow, Idaho, in partial fulfillment of the requirements for the degree of Master of Science in Civil Engineering.
5.
Giever, P. M., and Sack, R. L. (1989). “Similitude considerations for roof snow loads.” Cold Regions Sci. and Tech., Elsevier Science Publishers B.V., Amsterdam, The Netherlands (in press).
6.
Irwin, P. A. (1987). “Prediction of snow loading on large roofs.” Proc. 7th Intl. Conf. on Wind Engrg., Aachen, W. Germany.
7.
Isyumov, N., and Davenport, A. G. (1974). “A probabilistic approach to the prediction of snow loads.” Can. J. Civ. Engrg., 1, 28–49.
8.
Langham, E. J. (1981). “Physics and properties of snowcover.” Handbook of Snow: Principles, Processes, Management, and Use, D. M. Gray and D. H. Male, eds., Pergamon Press, New York, N.Y., 275–337.
9.
Linsley, R. K., Kohler, M. A., and Paulhus, J. L. H. (1982). Hydrology for engineers. 3rd Ed., McGraw‐Hill, New York, N.Y.
10.
Mayauchi, S. (1977). “Snow sliding from galvanized iron roofs.” Seppyo, 39(1), 7–14.
11.
Mellor, M. (1975). “A review of basic snow mechanics.” Proc. Int. Symp. on Snow Mech., Grindelwald, Int. Assoc. of Sci. Hydrology, Publication No. 114, 251–291.
12.
Petersen, R. L. (1986). “Simulating snow loads on fabric roofs.” Proceedings, Special Conf. on Advancement in Aerodynamics, Fluid Mech., and Hydraul., Engrg. Materials and Hydraul. Div., ASCE, Minneapolis, Minn., 894–901.
13.
Pinkard, J. J. (1985). “Prediction of snow loads on sloped roofs.” Thesis presented to the University of Idaho, at Moscow, Idaho, in partial fulfillment of the requirements for the degree of Master of science in Civil Engineering.
14.
Sack, R. L. (1989). “Designing structures for snow loads.” J. Struct. Engrg., ASCE, 115(2), 303–315.
15.
Sack, R. L., Arnholtz, A., and Haldeman, J. S. (1987). “Sloped roof snow loads using simulation.” J. Struct. Engrg., ASCE, 113(8), 1820–1833.
16.
Sack, R. L., et al. (1985). “Data acquisition and communications using unattended computers.” Proc. CIVIL‐COMP85, London, U.K., 309–316.
17.
Sack, R. L., and Shiekh‐Taheri, A. (1986). Ground and roof snow loads for Idaho. Dept. of Civ. Eng., Univ. of Idaho, Moscow, Idaho.
18.
Schaerer, P. A. (1981). “Avalanches.” Handbook of Snow: Principles, Processes, Management and Use, D. M. Gray and D. H. Male, eds., Pergamon Press, new York, N.Y., 475–518.
19.
Taylor, D. A. (1983). “Sliding snow on sloped roofs.” Canadian Bldg. Digest 228, Nat. Res. Council of Canada, Div. of Building Res., Nov., Ottawa, Canada.
20.
Taylor, D. A. (1985). “Snow loads on sloping roofs: Two pilot studies in the Ottawa area.” Can. J. Civ. Engrg., 12(2), 334–343.
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Copyright © 1990 ASCE.
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Published online: Oct 1, 1990
Published in print: Oct 1990
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