At 09:27 AM 7/6/97 -0400, you wrote:
>Normally one would expect a
>self-supporting tower to fail at the base and fall its length in one piece.
Steve, why do you say that? Normally free-standing towers (including
crank-ups) are MUCH larger at the base and grow progressively smaller as the
height above ground increases. Look at the Rohn SSV series for example. My
70' crank-up failed last year and it folded over at about 2/3 of the
crank-up height, at a point right above a section overlap. I've seen
several pictures of other crank-up tower failures, and none of those failed
at the base either. BTW, there were absolutely no signs of damage to my
foundation/base (with over 6 yards of concrete in it) and my new tower is
already using the same base.
73, Stan N3KK
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