Canada Isotach Wind Map


Maximum EPA charts shown in this catalog have been computed using load factors, height factors, coefficients of drag and 3 second wind gusts specified in AASHTO LTS-4 2001.

Values in this map are hourly mean wind speeds in mph, which are less than 3 second gusts. Therefore, all wind speeds shown above are to be multiplied by a factor of 1.32 in order to utilize the StressCrete Maximum EPA values. (e.g. map shows 62 mph, 62 x 1.32 = 81.84 mph)

The values shown are hourly mean wind speeds in mph at 10 m (32.8') above ground for terrain roughness category B.

PDF Version of Canadian Isotach Wind Map

canada isotach wind map

* This map is used with permission of Canadian Standards Association. Material is reproduced from CSA Standard C22.3 No. 1-01, Overhead Systems which is copyrighted by Canadian Standards Association, 178 Rexdale Blvd., Toronto, Ontario, M9W 1R3. While use of this material has been authorized, CSA shall not be responsible for the manner in which the information is presented, nor for any interpretations thereof.