I too had an engineer design elevated guy anchors. The alternative to an
I-beam, I used, is structural steel tubing. Mine is 5 inch square, 3/8
wall by 10 feet resulting in 5 feet above grade. Remember, you must have
'Nelsons" (horizontal pieces) welded to the post below grade, in contact
with the concrete, for structural integrity.
> In a message dated 4/1/01 1:29:51 PM Pacific Daylight Time, email@example.com
> > I've been doing my research with the "prime directive"
> > in mind, but, would like to know the collective's
> > opinion's/pro's/con's/concerns about guys tied to an
> > extended pipe or I beam which raises them above ground
> > level. Is it, or could it be, as efficient and SAFE as
> > what's suggested in the Rohn book?
> Of course they can be SAFE - you just have to engineer them properly.
> I-beam (eye-beam) is the material to use as it is stronger than a similar
> sized pipe.
> A proper elevated guy anchor is very robust - perhaps using 6-8" I-beam
> for a 4-5-foot elevated guy. Remember if you've got a 4-foot guy, it'll exert
> 4 times the bending moment on the anchor base than one 1-foot high so don't
> screw around.
> Since there's no manufacturer's specs on something like this, you need to
> have someone run the calcs and help you design one for your application. An
> engineer, or even better - a PE, is the person you're looking for.
> Cheers, Steve K7LXC
> Tower Tech