John, in all due respect, if you think that an unguyed 60 foot tower made
from Rohn 65G is not very strong and shaky, I'd like to have what your
drinking. Rohn claims that you can use 65 up to 60 feet with 70mph winds
with ±5 sqft of surface area, if you have the proper foundation. I would
think that Rohn 65 is stronger than a LM470 in 70mph wind with equal loads.
I have a homebrewed Hygain Hytower made with Rohn 25 and I climb up to the
27' level frequently without any guys. Sure, you don't want to go up there
and yank back and forth but it is perfectly safe.
Bob W6TR
----- Original Message -----
From: <john@kk9a.com>
To: <TOWERTALK@contesting.com>
Cc: <bmaser@tampabay.rr.com>
Sent: Monday, February 12, 2007 7:47 PM
Subject: [TowerTalk] Tower foundations
> If you want a 60' self supporting tower, you should buy one and not use
> Rohn
> 65G. A 60' unguyed Rohn 65G is not very strong and it's somewhat shaky to
> climb Having to attach guy wires every time there's a hurricane threat is
> just a pain. If you want to use Rohn 65G, you could probably just put a
> pier pin in your concrete slab and install one set of guys near the top
> and
> you'd have a very strong tower that you would not have to worry about
> every
> time the wind blows.
>
> John KK9A
>
>
>
>
> To: "Talk Tower"
> Subject: [TowerTalk] Tower foundations
> From: "Bob Maser"
> Date: Mon, 12 Feb 2007 13:04:18 -0500
> List-post: <mailto:towertalk@contesting.com>
>
> I have a 3x3x3 foot concrete foundation in my front lawn that I have been
> using for my HyGain HyTower antenna. MY plan is to remove the HyGain and
> enlarge the foundation to 6x6x4. I have heard that it is possible to
> hammer
> drill holes in concrete, pour in a 2 part epoxy, and insert threaded rods
> and this will be strong enough to be used for attaching a tower. I want
> to
> put up 60 feet of Rohn 65 and have it be self supporting unless a
> hurricane
> comes through the area, in which case I would put temporary guys on the
> tower. Does anyone have experience with this epoxy method and can give me
> some direction on doing this?
>
> Thanks,
> Bob W6TR
>
> _______________________________________________
>
>
>
> _______________________________________________
> 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
|