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Hi Brian,
yeh, 800 mm diameter doesn't make much sense, does it...? Sorry, I meant to write 300 mm, but if you want to be specific:
273 mm OD, 9.5 mm wall thickness, 1.2 m tall, ~15 mm flanges top and bottom.
Chemset bolts were used to secure it to the plug. (I wanted threaded rods concreted in, but the concreter talked me out of it...) Still, it's pretty solid.
It will be used to support a Paramount ME, holding a Meade 12" SCT.
I'll try and attach a photo of the pier. The plug is isolated from the surrounding 100 mm thick (200 mm at the edges) slab that will support the dome.
We will be grouting the gap between the bottom flange and the plug.
Cheers,
Geoff Mc
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