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Re: base plate design

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        Paul,
                I know only of base failures during construction, and none had anchor bolts as the proximate cause. All resulted from some issue with concrete confinement in the foundation. Either the pier lacked sufficient ties, shims were placed improperly or grout was not placed or some combination. A lot of bent anchor bolts resulted, though. I also recall a spread footing that was cast off location which was picked up by the anchor bolts and placed correctly (and that was back in the days of hooked bolts).
        Jim Getaz