SimpleGlazing is a material, not a surface. As such, it doesn't have any spacial characteristics. You'd want to grab all the SubSurface objects in your model and filter those by sub surface type to get, say, only FixedWindows. Once you have those you can look at the azimuth since SubSurface inherits PlanarSurface functions. From there you could create and new SimpleGlazing construction and assign it to those sub-surfaces.