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Re: [TowerTalk] Rohn 25g ennginnering spec. 130 mph

To: James Brennan <>
Subject: Re: [TowerTalk] Rohn 25g ennginnering spec. 130 mph
From: Bill Coleman <>
Date: Tue, 28 Dec 2004 09:31:07 -0500
List-post: <>

On Dec 8, 2004, at 2:12 PM, James Brennan wrote:

I am looking for some engineering specs forRohnn 25g
tower. I need the base diagram and wind load ratings
that are the most up to date.  I need to show that it
rates unloaded to 130mph with engineering specs and
drawings to get a permit to put up this tower. I am
only going 40 to 50 feet and bracketed to the house at

Rohn 25G can't do this. At 70 mph, a 40 foot tower bracketed at 8 feet can only hold itself up, much less support any antennas. At 130 mph, when the wind pressure is nearly four times greater, it would have all blown away.

I doubt even 55G could hold up in this service.

The base diagrams and wind load ratings are all available in the Rohn catalog.

Bill Coleman, AA4LR, PP-ASEL        Mail:
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901


See: 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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