Bill,
I like this solution:
http://www.qth.com/ka9fox/bolts_in_concrete.txt
And here is the web page of the company Brett talks about.
http://www.hilti.com/us/eng/sub/StaticPages2/static-921.asp
It looks liek they know concrete.
--
George Fremin III
Johnson City, Texas "Experiment trumps theory."
K5TR (ex.WB5VZL) -- Dave Leeson W6NL
geoiii@kkn.net
830-868-2510
http://www.kkn.net/~k5tr
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