Quote:
Originally Posted by glend
Agreed, local Council has the ultimate say, and 900mm seems to be a fairly common Sydney area figure (often seen as side passage access corridor). If you keep the height of the structure to 3 metres you may get away from any requirements for Council. However, if a neighbor complains you could have problems.
I do not recommend building an observatory on standard sort of porch deck, as they will flex. If your walking around inside you can't have your equipment shifting or vibrating. You can build a slighty elevated platform on posts, with cross beams and a solid ply floor, but your pier should be totally isolated from the floor structure. Isolating the pier just means bringing it up through a hole in the floor, you can pack the gap with flexible foam if you wish. The pier should be footing should be appropriate size. I always recommend a concrete pier, poured as part of the footing with reo inside, but it is more complicated than a steel pier on a flat footing, but it costs less.
Of course the design, and floor, is very dependent on what sort of equipment your putting inside. If your visual only, on a Dobsonian, that would require a different approach to imaging with a mount.
Good luck.
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Once I start imaging I won’t be walking around, so a deck will do fine. And I’m not going down the pier route. A tripod is just as stable.