[Ian Robinson]

Originally Posted by h0ughy

http://www.iceinspace.com.au/forum/s...ht=Observatory i am sure your answer is in there

Thanks for that mate, I do remember that thread.

I'm leaning towards concrete but the price of slab is not nice. I'll still have to put decent concrete footings in for my steel pier no matter what.
May not be that much extra to lay a mechanically isolated slab about the footing at the same time - I've never done any concreting myself and don't have the gear for it so I'll have to get a concreter to do that for me.
An off ground platform may not be that much cheaper than a slab and my carpentry skill may not be up to it.