Thank you for responding. I did try to create the room first, but when I selected "Deck" as the room specification, the rafters disappeared from the 3D view. When I select "Favmily" for the room spec, it gives me normal foundations and the wrong joist structure. Even when I changed the "Family" room walls to Railing, the foundation wasn't changed. I even tried to copy the rafters from the room I had created to the roof planes of the Deck, but PRO 2025 will not allow the paste to the roof plains. But, all is good, I worked it all out and have been approved by the planning commission to build the structure.
Again, thanks for responding.