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Old 10-08-2019, 03:01 PM
Sunfish (Ray)
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Sunfish is offline
 
Join Date: Mar 2018
Location: Wollongong
Posts: 451
For that height the bigger the better. I think you would have to add two or three diagonal pipe braces and perhaps fins from the slab up to to below the next level in different directions to prevent movement and perhaps fill part of the steel to dampen it down. Still easier than cutting a cubic meter hole in the slab. Perhaps you can find a calculation for the size and thickness required above the braces to get vibration to an acceptable level. It is a challenging height for mounting a scope.

The cost of the steel and welding and bolting may be more expensive than a new location higher on the site.
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