Jerry

Thanks for the advice it is much appreciated. I've taken your advice on the fixing method. As for your observation about the wedge being the weakest link i have had one made up from 15mm steel with 6mm full fillet welds its simillar in size to the Milburn it is one heavy beast and very stable. Can't wait to get it all installed.

Once again thanks for your advice.
Tony Floyde

----Original Message-----
Subj: Re: [M]: Opinions on pier design
Sent: 27 September 2001 16:13

Tony,
Your pier design is slightly shorter and carrying less weight than the pier
that I looked at for Dave. Without redoing the calculations, I can say
that your natural frequency will be higher than his, probably in the 100 Hz
range. You also have vanes on the outside that will add stiffness and
raise the natural frequency. Any deflection by unbalanced loads will be
negligible. Your 5 mounting bolts should be sufficient and if you use the
Hilti recommended procedures for their fasteners I have confidence that
they will hold . Make sure you read my other posts on how to mount your
pier to the bolts. BTW, as i was walking past our switchyard yesterda, I
noted that the giant towers that hold our 220kv transmission lines are
mounted just as I recommended yesterday for piers, with the nut on top and
bottom of the flange. Some smaller towers holding only a small capacitive
transformer or something light were mounted by bolting directly to the
concrete. All our our safety-related, seismicly qualified pipe supports
are double bolted.

You pier sounds great to me. As with most piers we've been discussing
here, you'll probably find that the weak link is the wedge.

Clear skies,
Jerry
Jerry Stephenson
949-368-6702

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