Quote:
Originally Posted by jenchris
I think the nice thing about it is the fact you can make it almost any size you like - up to about 3 metre wood lengths- I noted 2.4 lengths gave you the council max (no building license req) of 10 sq metres floor area - this is a nice size and fits well with 1200 x 2400 sheets of ply
Also worked out that it's possible to put wheels on the bottom plates and the whole obs can rotate.all you need then is a carefully crafted circularchannel in which to run the wheels and then you only need a 600 wide slot to zenith and make it turn with the OTA
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Just doing a rough mockup of this design, it seems to me that you need to calculate the effective internal dimensions - noting that each side is in fact a flat surface and therefore cuts the effective inside radius down somewhat. For example, using say 2 metre lengths for the base produces an effective inside circle with a radius of 1.4 metres or so - meaning a circle with an area of 6 or 7 sq metres. That does leave some useful spaces in the corners for shelves and so forth but an effective diameter of 2.8 metres is still a bit on the small side. Taking those lengths up to say 3 metres produces an effective inside radius of a bit over 2 metres - much more usable. That translates to an effective floor area of about 13-14 sq metres. To be within the 10 sq metre rule of councils, you'd probably have to stick to 2 metres but to have a decently useful area, you'd want to go to at least 2.4.
It would be easy enough to have a roof section that flips back or even rolls aside but the problem will be with imaging at the zenith. You'd have to have your pier well offset and that puts more pressure on the limited space inside. And it would be a bit easier to have a roof that rotates than to do that with the whole building I think - especially when you factor in the need to have the bottom contact with the slab waterproof.
I'm going to order a couple of these things and have a play with them. If anyone has any ideas about how to solve the zenith problem, I'd like to hear it.
Peter