It was not apparent from the dome that the Lanphier wind screen box, which protrudes from the dome skirt, would be so big. Further, it was not realized that when the main shutter was rolled over the dome to expose the zenith that the main shutter would go below the skirt on the backside of the dome. Since the roof line of the work room was close to the observatory room, eventually it was discovered that the dome would not rotate without hitting the roof. A possible solution was to jack up the roof three inches or modify the roof line. After much discussion, we decided a section of the roof had to go.
Flashing is used to fill the area.
Fortunately, we managed not to not disturb the integrity of the roof supports. In retrospect, this worked well, since I was getting concerned that the observatory dome was getting a little high, or, looking at it slightly differently, the observatory floor might be too low. Miscellaneous One event particularly stands out while constructing the observatory that I think is worthwhile commenting on. A wooden form was constructed for the large footing and pier. The footing is a cube of cement approximately 3.5 feet on a side, and the concrete pier is 2 feet on a side and rises 4 feet above the footing.