[TowerTalk] TowerTalk Digest, Vol 45, Issue 59

[K7LXC at aol.com]

In a message dated 9/12/2006 5:10:56 P.M. Pacific Daylight Time,  
towertalk-request at contesting.com writes:

k0rc at citlink.net>
Subject: Re: [TowerTalk] US Tower MA 550  Windloading - 90MPH?
To: <towertalk at contesting.com>
Message-ID:  <00db01c6d6ba$c3708470$6500a8c0 at GX400A>
Content-Type:  text/plain;    charset="iso-8859-1"

Hello Al,

With  this new engineering obstacle in your path, you need to start looking 
at heavy  duty towers, as suggested in other parts of this thread. Having to 
provide a  design with 1/2" of radial ice loading to the city puts your 
installation into  a commercial grade tower. Not only does the ice add surface area, 
it adds  incredible weight to a structure as well.

For reference, the Heights  Tower Company lists a standard 32 foot tower 
capable of supporting 8 sq ft of  antenna in 100 mph winds with 1/2" radial ice. 
You will find it listed near  the bottom of this page (scroll way down the 
page, right above the picture of  the 92 foot tower rated for 150 mph winds that 
was installed in south  Florida):   
http://heightstowers.com/stacked_tapered_towers.htm

Under that photo is  this statement: "Heights Towers can provide engineering 
calculations and  diagrams signed by a Professional Engineer licensed in your 
state for $350 on  standard tower configurations." Few, if any, amateur tower 
manufacturers  provide this type of engineering help.