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Hello Steve
I think your question is moot, the size of the pier you mentioned ( 1 x 1 x1 ) would have a weight of about 2.5 tonnes, if the mount was attached so there was no slop in the connection I doubt it would matter how it was poured, for example, my mount is sitting on a 1000mm long 250 dia' steel tube with full length welded gussets, this rests on a .8 x.8 x .8 concrete base which is a projection above a concrete mass of 1.5 x 1.5 x 1.2 ( into the ground ) the two concrete masses total just over 8 tonnes, all the steel reinforcing is 16mm deformed bar, the connections ( 8 x 16mm bolts ) between the steel pier and the concrete base are NOT torqued down but are tight.
Nothing moves - of course 8 tones of concrete may have something to do with that but I think we over think problems which may not be there in the first place.
Why did I build such a big mass pier? I wasn't going to dig a 1 x 1 x1 hole by hand, it didn't cost much more to dig a slightly bigger hole, my observatory needed the height and small amounts of ready mixed concrete carry a price loading, so 3.2m in a big truck was not a lot more than 1m in a small truck.
Ed
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