The first objective of this work was to determine the environmental loads to be used for testing wall configurations as part of the project “Performance Evaluation of Proprietary Drainage Components and Sheathing Membranes when Subjected to Climate Loads” heretofore known as A1-00030 (B1264). The appropriate wind-driven rain loads, expressed in terms of a combination of water spray rate and pressure difference, for key locations in Canada were determined. The second objective of the work was to provide the weather data for the hygrothermal simulation portion of the project; i.e. select Moisture Design Reference Years (MDRYs) for the simulation task. Appropriate climate data for this task was provided for the locations identified in first part of the work. After reviewing several published methods for selecting weather years for hygrothermal simulation a small comparison study was undertaken. It was concluded that the MI MEWS method was appropriate to use for this project. MI MEWS rankings were produced for all the years in the climate record for each location selected. Three MI MEWS years, wet (maximum), average (median), and dry (minimum), were generated and converted to an acceptable format for hygrothermal analysis. As a by-product of the task hygrothermal years using the other methods considered were also produced as well as a 10-year sequence of the most recent years for each location. A sample table of the data generated for a typical location is shown below. This information forms part of the climate database generated for the project.
National Research Council of Canada. Construction
Client Report (National Research Council of Canada. Construction), no. A1-000030.03.