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Strong argument for DIRTFT... Do It Right The First Time.

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Yeah, I know - that's why I posted the thread.

I almost couldn't find anyone to actually do the pour out there. NOBODY wanted the job. I was very, very explicit about what I wanted - and I specified isolation. But when the day of the job came, they weren't prepared to do it, didn't see the need to do it, and just flat weren't going to do it, and I didn't feel like I had a lot of other choices. The concrete guy didn't feel like he could do the isolated pier and have it be stable. (I'd been looking for someone to do the pour for a couple of months!)

If only I'd known why isolation is necessary - high frequency vibration - maybe I'd have told him to take a walk. (Although there's a real good chance I still wouldn't have the dome built yet had I done that.)

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