The drawing below is from Gustave Eiffel's book describing the tower that bears his name. There are 53 of them in total.
XIX. Floors and upper parts. Exterior elevations and amenities
This board, the 19th, is very interesting too. It shows the 1st and 2nd floors of the tower as they were at the time of the construction of the tower. We can see the shape of the pavilions, the pavilions, the decorations. The summit part is as well described. These drawn elements are less technical elements than a general representation with mentions about what is involved. There are also few ribs.