Revit Structure does not have a tool to create a ceiling plan, not on the Design Bar.
Not on the Menu either...
The reason is that, for the most part, structural engineers don't use them. In another post I suggested that feature for feature we could get away with just owning Revit MEP and Structure and get everything that Architecture has. I mentioned the lack of ceiling plans as one negative and a comment left said that you can create a view oriented like a ceiling plan despite the lack of a specific tool for it. I finally remember to mention how... you create a new Floor Plan type and alter a setting as shown in this image.
"Ceiling Views" are looking "up"!