[Normal4me]

Architects dream up the designs, engineers make it all work. If this is a structural concrete "Ceiling" on this dome, I would assume that rebar was brought out of the walls and continued throughout the roof making it one continuous body. If it has a metal truss system on it then I am not sure. It may be bolted or welded to beams inside the walls.

[jacquej]

Yep, and good architects do not design buildings that are impossible to engineer. (Thinking of Paul Rudolph here... his buildings drove everyone nuts, always leaked, and the finger-pointing would go on forever!)