The left hand support/connection is obviously there. The right is barely visible, but visible nonetheless. Abe, if there's any part of the roof support/connection visible, even if it's only one side, then it's not a floating roof. I don't think there's such a thing as a cantilevered roof. Keep searching and keep posting and Good Luck.
I concur.. Not a Floating Roof Cents from the late 1960's and early 1970's have the Floating Roof issue. But I understand what you mean. More faint than missing.