Top
of cement pier form in the observatory.
Looking
down into the 2 foot diameter tubular cement form shoes the internal
rebar structure. The rebar is somewhat free to move here but will be
centered in the form as it is filled with concrete. Some of the form
bracing can be seen around the perimeter of the tube. The longest form
available was 24 feet so a short extension piece was aligned end to
end with the main tube to achieve the full length needed. The seam where
the two tubes meet can be seen encircling the inner diameter of the
form several feet from the top.
