Hey Richard, this discussion forum is just getting better and better fith more functionality such as that previous post.. What Bob is saying though... is it not regarding the tab just before what you highlighted?... the allowable load variation that is normally sitting on 25%? I thought he meant reducing this to a smaller percentage of which I am asking if 5% would be enough. Another side issue... in the application guide it says that once the predefined hanger data is completed, and say for a Constant Effort support load, this column is filled in... does the Design Data entries now become defunct and not considered during the load case calculations?