Quote:
Originally Posted by glend
BTW this observatory is being built under the NSW Exempt Development rules (no Council apprval requird), so max height is limited to 2.5 metres.
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Heck ! I could add another 500 mm easy and still be within spec.
My split roof solution came about because of restrictions on roll off space in one direction. It splits out in both directions, East and West, max about 1.2 meter. This is due to neighbouring boundary proximity. Worked better than I expected as each half is quite light and now the slides have bedded in very easy, one handed almost, to move. Also means you can tailor the opening slot to your target and reduce dew effects. No rollers also means no seals or gaps to worry about, it sits flush on the top plates.
My walls are 1.8 meters, the pier puts the scope up high enough to get 35* all round or better in the E\W directions but LP, trees to east and a small volcano to the NW ( Mt Albert) means I don't have horizon views regardless so I work as high up as I can near the zenith or to the S - SW.
Go and stand in the position you think your pier will be and look around to see what visual restrictions etc you have to contend with. Then plan to get the best options in your design. My East is useless so I could have a 20 meter wall there and it wouldn't be a problem.
You can always extend your pier later as I have if you find it gains some more sky acreage. When I moved to a 102mm refractor I added 150mm box from where the 10" Newt used to be mounted from.