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Hi Bert....these are exactly the videos I referenced my pier design to.
I even emailed them on costs...no reply. My ribs went a little too high but I can fix that but the principle of not requiring the adjustable "rats cage" is appropiate and adding longitudinal ribs lower flexure by holding in tension and also alter resonate frequencies.
I went thru the pier calculators on CN but could find no reference to the effect of adding ribs (past my engineering skills...although something to do with the 2nd order/derivative of momentum)...although knowing they would improve the performance as mentioned. I like your work...noting the placement of the pier footing bolt holes...near the ribs! Well done a lot of thought into that I can see.
I too recommend these videos for people but the difficult thing is finding appropriate pier pipe...now that that's the key!
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