Re: [ATM] Stone observatory foundation?

[Ken Lowther <hermit@outofoptions.org>]

Are  you thinking of stone or concrete to dampen vibration?  I think 
you best bet would be to have your pier go all the way to the ground 
and just have it poke up through a hole in the floor that would isolate 
it from floor vibrations.

Ken

Quoting Michael Burr <mtburr@msn.com>:

> Greetings:
>
> I haven't posted in a long time; my ATMing has been dormant over the 
> past year while I have concentrated on building our new house. But in 
> the wake of a recent visit by John Dobson, I'm inspired to take up 
> the task again.
>
> One of the projects I have planned is to build an observatory. I'm 
> considering raising the observatory up, maybe 6 feet or more, to get 
> a little more clearance over some trees that border my location. 
> There are a lot of small boulders strewn around, and I am considering 
> building the raised "base" of the observatory from stone and 
> concrete. I am unsure, however, of the thermal properties of stone. I 
> would not want to create a radiative nightmare.
>
> I've searched the ATM list archives and done some poking around on 
> the web, but thus far haven't found any useful guidance. Does anyone 
> on the list know whether stone soaks up and radiates a lot of heat? 
> I'm guessing it does and I am out of luck with it.
>
> Unfortunately I don't know what kind of stone it is. We have a lot of 
> granite around here (central Minnesota) and if I had to guess I'd say 
> maybe it's granite. Definitely it's not a sedimentary rock. It looks 
> metamorphic to me.
>
> Any thoughts would be welcome.
>
> Best Regards,
> Michael Burr
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>

----------------------------------------------------------------
This message was sent using IMP, the Internet Messaging Program.

_______________________________________________
ATM mailing list http://www.atmlist.net/