          |
  |
Pier Extension
I encountered an interesting problem when I considered how high the pier needed to be to accomodate the telescope I now had AND any telescope I may acquire in the future. To solve this problem, I designed an adjustable and removable pier extension to sit atop the permanent concrete pier foundation. The inexpensive materials and simple construction are such that if a different height is required for a larger telescope, another could be made and bolted to the foundation instead.
Another feature of the extension is that it can be precisely leveled at both the bottom and top so that the telescope mount on top is accurately positioned. The major components are bolted together with 1/2"-13 stainless steel bolts in a triangular arrangement that can be used to level the horizontal plates.
The extension is made from three circular steel plates 12" in diameter and 1/4" thick and three lengths of steel angles 1-1/2"x1-1/2"x3/16" thick. These materials cost about $70 in these pre-cut shapes. The angles were welded to two of the plates in a triangular arrangement. Mounting holes for the foundation and the top plate were also drilled into the structure. A stainless steel bolt was welded to the top plate for fastening the telescope mount wedge. Finally, the whole assembly was powder-coated for looks and to protect the steel from corrosion.
Click on images to enlarge:
 Doin' Some MIG Welding! |
 |
 Powder-Coated and Assembled |