> <snip>
> "Rohn has a section in their catalog for unguided towers which
> includes Rohn 25. They call for something like 2.5? x 2.5? x 4? of
> concrete for the base. I?m not sure I really want to be up 35 feet
> on that, but it has been in their literature for as long as I can
> remember. "
>
> <snip>
First, it's *GUYED* not "guided" ...
Second, the Rohn specifications for free standing Rohn 25 call for
*very little* wind load area even in the old 60 MPH wind zones. There
is no way a freestanding Rohn 25 will pass muster with a WARC beam
in a 140 MPH wind zone. *Maybe" Rohn 55 or 65 will do the job but
there are no off the shelf designs for that application (at last to
my knowledge).
73,
... Joe, W4TV
On 2015-01-30 9:14 AM, jcjacobsen@q.com wrote:
Jack and all,
On the subject of 25G permitting and such, I think a closer look at Rohn docs
is in order.
Jack sent this reply:
<snip>
"Rohn has a section in their catalog for unguided towers which includes Rohn 25.
They call for something like 2.5? x 2.5? x 4? of concrete for the base. I?m not sure I
really want to be up 35 feet on that, but it has been in their literature for as long as
I can remember. "
<snip>
The way I read the current Rohn docs for 25G SELF SUPPORTING is a base
4'x4'x4'. The smaller base is for guyed towers.
Good luck with the project and stay safe.
73
K9WN Jake
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|