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Re: [Losmandy_users] Permanent Pier Questions


Nov 18, 2001

 


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#6792 Nov 18, 2001

In a message dated 11/18/01 1:36:15 PM Central Standard Time, gardner.w@... writes:





Any information, descriptions or images that you may have on web sites

would greatly be appreciated. ��Of course if there are things that I haven't

thought of yet, that I should know about, that would also be greatly

appreciated.



TIA,



Bill Gardner











Bill,

I machined my own adapter out of aluminum and had a steel pier made out of 6" cast iron pipe and 1/4" plate steel. ��The pier itself is actually not in direct contact with my concrete footing.....I fashioned three j-bolts out of 1" galvanized threaded rod and set them in the wet concrete of the footing with about 6 inches of threaded rod sticking up out of the concrete. ��The spacing and perpendicularity of the j-bolts was controlled by a jig I made out of some particle board I had laying about. ��Once the concrete had set, I threaded on some galvanized nuts onto the rods, stacked several galvanized washers on the nuts, placed the pier, added more washers, and lastly the top nuts to capture the whole thing. ��To balance, I loosen/tighten the corresponding nuts until it is dead on (as indicated by the bubble level in the mount). ��I set the level on my mount last summer and it has stayed there since.



I sent Jimmy Thibert of this group plans of the pier last winter and he seemed pleased with the outcome. ��The trick is being able to find schedule 120, 6" cast iron pipe. ��If you can do that, you don't need an adapter for the mount. ��You can machine the mating features directly into the pipe.



The only concern I would have about this setup is if the pipe is real long then it would act like a tuning fork even with sand in it. ��Jimmy put in lead blocks between the pier and concrete so his is isolated from surrounding sources of vibration. ��I, Jimmy may have as well, put sand inside my pier to help dampen vibration sources within the pier itself....accidental contact by myself mainly. ��Still, our piers our relatively short, 36" for mine and if memory serves me, around 42" for Jimmy's. ��You can check out his setup at his website which is: ��www.frenchriverobservatory.com. ��The thing I would recommend is keep your pier short and if you are going to a second floor or something then extend your concrete footing up to that level with sonotube and rebar.



I had a picture of my setup in the Member's Equipment folder of the SCT-users group but it may be gone now. ��How this helps a little.



Andy Mc



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