I am designing concrete anchorage for an antenna, (epoxied threaded rods into existing concrete. I noticed in the '06 CBC, Section 1605 that the wind design factor for strength design is 1.6W. I always thought it was 1.3W. Can anyone shead some light on this increase, or has it always been 1.6?
Thanks in advance.
Larry Hauer S.E.
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