Hi! Here are some thumbnails of my low cost re-locatable roll-off observatory. The design is based upon a standard shed supplied by Shed City (based in Kilmore, Victoria). Shed City agreed to supply modified parts (e.g., the split roof and roll-off rails) to our specification which saved heaps of time and money. Because history has shown that I have to move house on average once every three years, I wanted a facility that could be relocated with reasonable effort. The observatory can be disassembled in one day, transported on the next day, and then reassembled in another. Three adults are required to disassemble and reassemble the facility safely, and it is a good idea to choose a wind-free day. Although the observatory itself is easy to erect, the all-important foundations usually require many person days to prepare. I dig out 6 inches of earth, level the base, and then lay ceramic tiles on a bed of sand to help suppress ground vibrations. The final ceramic surface must be very level to ensure the observatory walls fit snuggly and the roof rolls on and off smoothly. As with any building, getting the foundations right is crucial. You can look at higher resolution versions of the attached thumbnails here:
http://www.flickr.com/photos/mlparki...7631508936947/
Murray
http://www.flickr.com/photos/mlparki...57631508936947