Thanks for the welcome Steve. Yes, the pier will be attached to a cement filled sonotube, 12" (or bigger) in diameter as far as I can dig it down (6'?) and then, as it comes through the existing deck, the pier will not touch any part of it to eliminate deck vibration through the deck to the pier to the scope.
When I built the deck 15 years ago I put the joists 12" on center so I'm going to cut one out and box it and I will have a couple of feet around the joists to dig. The deck is maybe 18" off the ground. I would really like to do what you suggested regarding the 36" base, but it ain't gonna happen, it would require taking the deck apart and SWMBO has already relented this far I don't think she'll put up with that. The top of the concrete cylinder will be just below deck level just in case I want to restore the deck to it's old self in the future.
I understand it would be optimum to have the OTA just peek over the shutter, but, like you, my horizons are obscured and filthy so seeing within 20 degrees should be fine. I also didn't want to be too high and uncomfortable when viewing.
I will post some pics of the progresssion here and this weekend take some pics of the deck.
QUOTE(SteveDurham @ Apr 6 2007, 11:07 AM)
Ed...welome to our Forum, now yours also!!
First, Perhaps Neo could add his thoughts on pier placement with the LX200....He's done a real nice corner layout with his to determine wall height and offsets from center, if any. Neo???
Next, the deck....If you decide to build on it, you should definitly plan on separating the deck from the pier. If not, ANY movement on the deck will cause unwanted vibrations in the scope. If the deck is off the ground at all, I'd suggest a suitable size base, say 36" X 36" X 36", topped with some concrete filled chimney block at least 16" square up thru the deck. Then add the Astrosky pier to the top of the column.
Ideally, I feel the bottom of the shutter should be even with the bottom of the OTA when the OTA is horizontal. However, most of us cannot see thru the soup directly above the horizon anyway, so if the OTA has to "look -up" a little to see out the slot, nothing is lost.
I'm sure that others will chime in also...be patient.
Be sure to post images, so we know what you are describing. You could start with some of the deck....