This is my problem. I could default and get a Baader pier that is custom made for the mount in question, but it is over 2k.
It seems ridiculous. Although I am handy with wood, I have no experience with metal. I am tempted to get a pier made, but I am assuming, to have it CNC machined and then powder coated, I will still end up spending about £500. That's fine if the final product is right - but I don't want to waste that money on something that doesn't quite work.
If you have a 14k mount sitting on the thing, you don't want to neuter it with a poor pier design.
Feel free to comment, but understand, this is not an area where I have expertise, so to some of you, this may look like I am overthinking it...
I agree with iwannabswiss, get the correct dimensions, put them on a drawing and give them to a local fabricator and you'll get a pier which works fine. Heck, you can do most of the metal work yourself with wood working tools. Both aluminum and plain steel can be cut with normal blades and bits. Steel will wear out regular bits pretty quickly, though, so don't use your good tools (or buy some disposable tools).
Your pier will have three components:
Base plate: to bolt to your concrete footer/ foundation. It can be round or square, it doesn't matter. You'll need to provide the following dimensions to a fabricator:
- Thickness of the plate, 6mm will look a little light, 12mm will look good, 19mm is overkill
- Overall dimensions of the plate, e.g. 300mm diameter or 300mm x 300mm
- Size and location of the bolt holes, e.g. 4 ea 14mm diameter holes (for 12mm bolts) at 90o on a 250mm bolt circle (that will tell the fabricator you want four 14mm holes spaced 90o apart, the centers of the 14mm holes will be on a circle 250mm in diameter)
Column: you only need a couple of dimensions for this: diameter, thickness and length. To match the base plate dimensions I assumed above, I would try using standard pipe, DN8, schedule 40, and however long you need to get your scope at the right height for you. That gets you standard 8" sch 40 pipe (219mm OD x 8.2mm thick, heavy but readily available). You can also use square or rectangular tubing, e.g. 200mm x 200mm x 6mm square tube. I'm sure that will be less available and more expensive than pipe, though.
Top plate: provide the same basic dimensions as for the base plate above:
- Thickness of the plate, I suggest 12mm
- Overall dimensions, this will be based on the base of the mount you're going to install
- Size and location of the bolt holes, again, your mount company should provide you with a drawing which shows the bolt pattern you need
Then the column gets welded to the base plate and the top plate welded to the column. Tell the fabricator squareness is important, the top and bottom plates should be parallel to within 0.5mm across their width (or whatever tolerance you want). Then you can have your pier painted or powder coated. When it comes time to install it you'll spin nuts onto your anchor bolts (the bolts embedded in your concrete), set your pier over the bolts and onto the nuts, then spin another set of nuts onto the anchor bolts. You'll adjust the lower set of nuts to make your top plate level then tighten the top set of nuts to secure your pier. If you want, you can then pack the space between your footer/ foundation and your base plate with mortar or concrete but you don't have to. Finished.
If you provide me with some dimensions (and are patient) I can get you a drawing...
Edited by macdonjh, 23 September 2020 - 12:32 PM.