Octa Dome 4-A with Base Option

Normal orientation with 4-way connection at top, and geodesic Base Option.
Base Option adds 4 ft to the 20 ft diameter 2 x 4 dome illustrated.

Vertical lift-off extension cupola can help shed rain off the top and ventilate the dome with windows or exhaust fans placed in the rectangle areas.

Detail of the Cupola design:

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