Monday, April 07, 2014
Wind Loading Surface Roughness Length versus Terrain Category
AS1170.2 commentary contains a design chart which identifies various terrains and gives the surface roughness length (z0). From this chart it is apparent that most rural properties are not TC3 but also they are not TC2. By the use of z0 an intermediate terrain category can be calculated and more economical designs are possible.
The spreadsheet can be downloaded here: surfaceRoughnessLength.xls
[23/04/2016] Changed download links to MiScion Pty Ltd Web Store