Progress is finally being made on the TSH (Talavera Space Hut). I decided for my location here to go with a sliding roof structure. I also thought about a clamshell type dome. My wife wanted something that would match the house! So there you go. The shed won out! I will do a clamshell when I set up at my dark sky site. The shed design is small, only 8′ square which is big enough for what I will need. Remember though from the last post, you are going to be limited with respect to how low the walls can be. In ths case it turns out that 68″ was a reasonable height. This will allow access to sky down to about 25 degrees to the South, West and North. East we will be a little more obstructed from the roof peak. I am having the builder make the roof as flat as possible. Remember not to forget about the roof peak obstruction! I put the roof on the east side because that is where the house will be and I don’t lose any sky there.
The floor is cement which is about 8 inches deep and is separated from the central pier by 1″ thick foam which you can’t see. The pier is a 12″ diameter cement base which goes about 3-4 feet into the ground, so much deeper than the surrounding floor. 4 j bolts are cemented into the pier base. I have a steel pier for the mount which has slots to accomodate the J bolts. It is very important to be sure the J bolts are oriented properly so the mount is able to point directly to the celestial pole! This will be different for different systems but you will have to do some templating of some kind. Do the templating off of the North Star and do not use a compass! I made that mistake the first time. I lucked out because I was able to adjust the pier using the slots at the bottom and also the mount has some reasonable flexibility with azimuth adjustment.