1. American National Standards Institute (1982). “American National Standard Minimum Design Loads for Buildings and Other Structures.” ANSI A59.1‐1982 New York N.Y.
2. Metal Building Manufacturers Association (1981). “Metal Building Systems Manual.” Cleveland Ohio 1981.
3. National Research Council of Canada (1985). “Canadian Structural Design Manual.” Supplement No. 4 to the National Building Code of Canada Ottawa 1985.
4. Drift Snow Loads on Multilevel Roofs