|
I haven't got an observatory but I have got a steel pier in the back yard. I found a 220mm diameter steel pipe 2.7m long at a scrap metal yard for $70. For the concrete foundation I used the local Concrete Taxi. They mix the concrete for you on site and you only pay for what you use. I think the minimum order was 0.1 m3. They are a franchise business with outlets all over Australia. Try the yellow pages or online to get a quote.
|