Installation Manual
Table Of Contents
Table 3. Ambient Temperatures (°F) for Ice-Free Surfaces
Average wind speed during freezing periods
6 -40 -25 -10 0
8 -40 -10 0 10
10 -25 0 10 15
12 -15 5 15 20
Obtaining Snowfall Data
Snowfall data is not available for all cities. However, you may still specify snow-
melting performance if you can obtain snowfall data for a city with comparable
snowfall conditions for which published data are available.
Alternatively, you can use Table 4 below and Figures 1-6 on page 19 to deter-
mine the snow-melting performance to specify. Each figure contains a snow-
melting performance curve from which you can determine cumulative snowfall
hours for your application.
Using Table 4
Which of the snow-melting curves you should use depends on the snowfall con-
ditions for the city in which your application is located. Table 4 below lists typical
U.S. and Canadian cities and shows the figure number for the curve applicable
to snowfall conditions for each city. Using Table 4, locate the city with a snowfall
pattern similar to the location for which you are designing the ElectroMelt system.
Turn to the snow-melting curve in the figures listed for that city.
spacing (in inches) 5 mph 10 mph 15 mph 20 mph
17
ElectroMelt System
Design Guide
Supplemental Design
Information
Table 4. Figure Selections for Snow-Melting Performance Curves
USA
City Fig. City Fig. City Fig.
Albuquerque, N. Mexioco 1 Detroit, Mich. 1 Oklahoma City, Okla. 5
Boston, Mass. 6 Duluth, Minn. 4 Philadelphia, Pa. 2
Buffalo-Niagra Falls, N.Y. 1 Falmouth, Mass. 6 Pittsburg, Pa. 1
Burlington, Vt. 1 Great Falls, Montana 4 Rapid City, S.D. 4
Caribou-Limestone, Maine 3 Hartford, Conn. 6 Salina, Kansas 3
Cheyenne, Wyo. 5 Lincoln, Nebr. 4 Sault Ste. Marie, Mich. 3
Chicago, Ill. 1 Memphis, Tenn. 6 Spokane, Wash. 1
Colorao Springs, Colo. 3 Minneapolis-St. Paul, Minn. 3 St. Louis, Mo. 6
Columbus, Ohio 1 New York, N.Y. 2 Washington, D.C. 2
Canada
City Fig. City Fig. City. Fig.
Calgary, Alberta 4 Ottawa, Ont. 3 Sudbury, Ont. 4
Halifax, N.S. 6 Quebec City, P.Q. 3 Toronto, Ont. 1
Kamloops, B.C. 1 Regina, Sask. 4 Vancouver, B.C. 1
Montreal, P.Q. 3 Saint John, N.B. 1 Winnipeg, Man. 4
Snow Melting Performance
Requirements
Heating-cable