Here are pictures of
the pier footing, shuttering and the pier itself :-
builders continued their work and finally in June 2006 we moved into our
renovated (re-built) house with is detached garage with strangely located
door to nowhere…
2006 it was my turn to progress the observatory build.
probably a little lazy in not wanting to make a entirely new roof and
therefore I utilised the one from the old observatory. This saved time BUT
had a heavy restriction on the size and position of the new observatory.
early picture of the construction :-
As you can
see I didn’t quite get the garage door in the right place! And since moving
it would be a little problematic I decided to make the best of it by
slightly offsetting the observatory structure.
progressed well, however most of the design thought went into getting large
and heavy items up to the observatory level without a machine or assistance.
I ended up building the walls with the roof already inside. Then I carefully
lifted the roof out the top and onto its runners, all single handed!
I don’t mind
heights but fitting the roof out-riggers was quite a challenge.
Whilst I was
building the observatory structure, I also commissioned a steel pier to
extend from the concrete pier to the scope. I must thank Dennis Persyk for
his excellent article of sizing steel piers. Using his data, I had built a
300mm diameter, 4mm wall, 2000m in length steel pier with 12mm steel plates
at each end. The steel fabricator I used could not economically source 300mm
thin wall pipe so we decide to roll our own! This appears to be a success
and is comparatively light for its size.
pier was bolted to the concrete pier and a levelling plate was installed
directly below the scope. A coat of flat black paint finished it off.
Here are a
few pic’s of the nearly completed observatory:-
Stage two of
the build was constructing the ‘warm room’. I made the garage a bit longer
than normal and I have built a 1.2m wide room in the rear which has direct
access to the observatory. I built insulated cavity stud walls and insulted
the roof. Temperature data from my early tests show that the PC alone keeps
the room several degrees above the outside temperature.
pic’s of the warm room and scope installation. The purple carpet is an off
cut from my 10 year old daughter bedroom (honest!)
And a pic of
the mount and scope...
observatory is now close to operation, I carried out polar alignment last
night, 1st November 2006.
Hope you like
the slightly unusual build, please ask any questions that may help you with
your own projects.