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Thanks for all the replies. I put this up to sound out the combined wisdom at IIS in case I missed any major design consideration.
The reason for having the wall so low is so I can easily carry OTA's etc in without negotiating a narrow doorway. It is the twisting when carrying a load that literally screws your back. Mine is fine and I want to keep it that way. The south wall without the door could be higher but I like the symmetry. Wind is not a problem at my place as the whole of my backyard has trees that shelter it from all but the strongest winds 20+ knots.
The open end will be adequately braced with ply at the corners. A flat roof that clears everything would make the sides too high. I may put another door in the high wall for easy access when closed.
I have been in enough tin sheds in summer to know that insulation is a must against radiant heat. There will be heaps of ventilation through the open deck floor as well as under the eaves of the roll off roof. A couple of 12" exhaust fans one at each apex of the ends should get any hot air out. Any potential condensation build up in winter should also be stopped by adequate ventilation.
I sit inside when collecting data as my main computers are wirelessly connected to the laptops that control the autoguiding of the mount and the camera. I really only go out to focus and aquire the target. I also am of the old school and need to see as much of the sky as possible to find my way around manually. That is I do not use GOTO. I reset each exposure set manually as I watch them as they come in. I only have a nap if there is no chance of rain by keeping an eye on BOM radar. You can still get caught in Melbourne.
As I am retired when I image I am up all night till dawn and It would be nice to just shut the roof and go to sleep. Having the walls low also means that it is far easier to pull the roof shut without having to reach above about waist height.
Bert
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