diy pier advice ,tube size

[iwols]

after looking at various piers for my heq5 with ed80 and st80 plus the usual filters /focuser and camera i thought ide make my own ,looking at 1000mm tube 3 mm wall and 125mm in diameter with 200 mm 5mm round plate at each end to attach to large concrete block on the floor and 2 suzuki brake discs to fit my heq5,would 125mm tube with 3mm wall at 1000mm be strong enough ,any thoughts and advice welcome

[Jonk]

I went through lots of ideas / websites when I drew mine up to be made.

Once of the most helpful sites I read was https://www.cloudynights.com/articles/cat/articles/how-to/pier-design-fundamentals-r1236

[iwols]

4 minutes ago, Jonk said:

I went through lots of ideas / websites when I drew mine up to be made.

Once of the most helpful sites I read was https://www.cloudynights.com/articles/cat/articles/how-to/pier-design-fundamentals-r1236

thanks what sizes did you finish up with jonk

[Jonk]

You can see the pier and what I did here ->

Looking back, I could have made it longer but at the time I wasn't planning on putting a shed over it, so I lose anything below about 30 degrees but for imaging that#s not really a great problem.

[iwols]

wow thats some pier

[Andyk93]

I’ve just finished my pier, it’s 1m tall, 6 inch round tube 6mm thick with 2 10mm plates top and bottom. The top plate is 20cm square and the bottom plate is 30cm square. It is completely solid even if I jump around it while imaging.

 

[spillage]

Mine is about 4ft tall (2ft in the ground). I used 6" plastic ribbed, lined pipe and set a brake disc in the top to attach my mount. So far so good and very cheap to do.

[bottletopburly]

i used 139mm x5mm tube 750 mm long though length depends on your scope type mines here https://stargazerslounge.com/topic/296405-pier-project/