[TowerTalk] Concrete anchors

[Keith Dutson]

I know of several folks who are using less than the recommended 80 percent
of height rule.  This puts more load on the guys for a specific wind load at
the top of the tower.  If you are not worried about very high wind in your
area (other than a tornado), you can get by with radial distance of 60
percent (72 feet in your case).  Even this will be difficult with your lot
dimensions.

What kind of antenna are you putting up?  Better be a low wind load rating
(<5 ft) or you are risking a collapse.

There is another alternative, but it is expensive.  Either use a larger
tower (e.g. 55G) or plant some tall steel guy posts.  The latter moves the
effective guy point beyond the post.  These elevated guy posts will require
a much larger (i.e. heavier) base of concrete.

Keith NM5G

-----Original Message-----
From: towertalk-bounces at contesting.com
[mailto:towertalk-bounces at contesting.com] On Behalf Of Bryan
Sent: Friday, September 17, 2004 3:04 PM
To: towertalk at contesting.com
Subject: [TowerTalk] Concrete anchors

The drawing I have for the gac305 anchor shows them angled but doesnt give
any hints on how to do it.  I know I need the hole to be 3x3x4 but from
there I'm not sure what I need to do to get the anchor in the right
position.

I have a yard that measures 180' long by 80' wide. I'm looking to install a
120' rohn 25g.  Can I run 4 sets of guys off the tower to make up for not
having the 120 deg span?  

Thank you for your help

Bryan
_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless
Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any
questions and ask for Sherman, W2FLA.

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