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Isolation for a table for floors with movement

Hi there, there sure are allot of stands and isolation types available but what would you recomend?

My issue is I have suspended wood floors and I know there is movement so I want to address this.

Unfortunately a wall mount is out, just don't have the adequate area to do this.

My table is the TW Raven One, I have some thoughts but wanted to read what others think.
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Showing 4 responses by artemus_5

artemus_5's avatar
artemus_5
1,992 posts
 
Jsawhitlock is correct but you may want to use 2 jacks with a 4x6 spanning across the jacks and supporting all the joists which are under your system. Depending on the span you might use a 3rd jack in the middle. For a footer use a 4x8x16" solid cap block. Of course this is with the assumption that your system is on a 1st floor with access to the crawlspace or basement below.
artemus_5's avatar
artemus_5
1,992 posts
 
Inpep.., a great idea and one I used extensively in the 70's and 80's. I've mentioned this on other forums and it seemed so foreign to some that I don't even mention it anymore.
I would not hesitate to do so today as long as you can get solid support from the ceiling joists.
My 15-20 lb TT of the 70's wasn't a problem to hang. A modern mass loaded 50 lb TT might make me extremely careful and somewhat worrisome. So i can understand anyone's skepticism of the hanging method
artemus_5's avatar
artemus_5
1,992 posts
 
From a builders perspective, you are on a road towards disaster with that plan. Concrete is extremely heavy and needs to be engineered and built with steel rebar to be self supporting with a load. This is not the kind of thing you do with wooden joists incorporated
in all probability, your floor is fine since it is already over engineered from what i can tell. Two layers of 3/4 plywood is not normal procedure. If you have I-Joists, they are very rigid also.
artemus_5's avatar
artemus_5
1,992 posts
 
If you must beef up your floor you could remove the sheetrock below and put new joists between the existing, spanning from bearing wall to bearing wall. This would make for 8" o.c. which should make for great rigidity.
Also, consider that I have a 130-140 lb turntable (Teres) which sits atop a custom mass loaded stand which weighs another 100 lbs or so. This is sitting on a floating wooden floor using 10" joists @ 16" o.c. with a single sheet of 3/4" plywood flooring. I can jump in front of my TT while it is playing with no detrimental action to the TT's performance. However, I do have it braced from beneath. But it is not extreme bracing. Only a few uprights were needed.
Just something to consider
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