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Re: [TowerTalk] Reduced guy radius for Rohn 45G tower

To: "Avery Davis" <>, <>
Subject: Re: [TowerTalk] Reduced guy radius for Rohn 45G tower
From: "Mark Robinson" <>
Date: Thu, 23 Aug 2012 16:35:14 -0400
List-post: <">>
The guys should be out 80% of the height. So if your tower is only 40 feet 
high, then the guys only need to be out 40x 0.8 feet =  32 feet

A 50 foot tower and the guys are out 40 feet. Can you fit that in ??

73 Mark N1UK

----- Original Message ----- 
From: "Avery Davis" <>
To: <>
Sent: Thursday, 23 August, 2012 1:33 AM
Subject: [TowerTalk] Reduced guy radius for Rohn 45G tower

> Pardon me if this is a dumb question for my first post to this list, but
> this is my first real tower after many years in Amateur Radio.
> I came across a great deal on a lightly used Rohn 45G:  six sections
> plus a top section.  The problem is that my lot is not really big enough
> for the 56 foot guy anchor radius recommended in the Rohn brochure.  I
> am looking for suggestions as to what I can do to make this smaller.
> For example, I could put up just a few of these sections with no guys.
> The Rohn 45G self-supporting tower brochure has a table for 90MPH (which
> I understand is required for my jurisdiction, although radial ice is
> not), but this only allows 30 feet height with 4 sq.ft.  This is smaller
> than I would prefer, which is nominally about 10 sq.ft., but the Rohn
> brochure puts me at only 20 ft. height for 11 sq. ft.  So, what can I do
> with these tower sections to get more than 30' height and 10 sq.ft. in a
> radius less than about 20 ft.?  Would it help to use three sections as
> elevated guy anchors?  This would leave me three sections plus the top
> for 3x10 + 8 - 4 = 34'.  How do I determine the wind load allowance for
> this configuration?
> Or, would you recommend I just resell the 45G and buy a genuine
> self-supporting tower?
> 73,
> Avery, WB4RTP
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