[TowerTalk] Re: Tower Question

[Frank Donovan]

Ken,
Yes, your proposed approach will work, but a few additional points to
consider:

 - Pipe is a very non-cost effective structural shape for this
application!  You would be much better off to find a junkyard that sells
I-beams.  This is very commonly available, and a far more efficient shape
for structural side-loads than pipe.

- Plan on using  L O T S  of concrete!  The foundation must resist the
overturning moment that the I-beam (or pipe) will apply to the foundation.

73
Frank
W3LPL
donovanf@sgate.com



On Thu, 7 Aug 1997, Claerbout, Ken wrote:

>      It dawned on me last night as I was mowing the lawn that I could 
>      probably go with the guying dimensions for 110' tower since that is
>      what I would have in effect.  The top guy could be moved down from
>      101' to 99' or so.  The only problem is that I do not have the room
>      to go out 88' from the tower for guy anchors.  This may not be a
>      problem since I wanted to elevate the guy point to keep someone
>      from hanging themself in my backyard.
>      On my 75' Rohn 25G I have one of the points elevated using a steel
>      pipe, filled with concrete, with an OD of 3 1/2" and wall
>      thickness of 1/4".  It works fine for this appliation.
>      Are there others who have done this and would care to share their
>      experiences?  This would seem to be an acceptable subsutitution for
>      the traditional guy point provided the pipe & concrete base  is 
>      capable of handling the reactive loads as provided in Rohn's
>      catalog.
>      Using a bit of trigonometry (remember that fun stuff), the location
>      of the pipe and height can be obtained so that the guy lines are at
>      the same angles and the load is distributed properly.
> 
> 			73  K4ZW        



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