Cleaning would be done by a large window cleaning company (Clean & Polish, Valcourt, etc). Im working with the owner to devise a method and looked here as a resource. (we will likely get window cleaners involved as well)
They do not want a mobile unit because sadly they are cheap.
Building is 10 stories, 42" rail, sidewalk below.
Just want to know if there are any safe techniques outside of what i mentioned above. This is new construction so permanent roof anchors will be installed; location TBD.