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Re: [TowerTalk] Tower Challenged

Subject: Re: [TowerTalk] Tower Challenged
From: "Roger (K8RI)" <>
Date: Sun, 27 Jul 2008 22:29:27 -0400
List-post: <">>
Gene Smar wrote:
> Jeff:
>      I agree with Tom - don't use the chimney to mount any appreciable-sized 
> antenna.  The chimney may look sturdy but mostly they are three sides of 
> brick that are attached to the house with galvanized steel straps layed up 
> between the mortar layers and nailed to the house walls. 
A properly designed chimney is free standing with *no* attachment to the 
house.  On a two story house with a chimney in the middle you can see 
the roof move several inches in relation to the chimney on a windy day.  
Don't depend on any aid from the house structure.  Attaching a chimney 
to the structure would be very hard on the structure of the chimney as 
it'd be holding the house on a windy day rather than the other way around.
>  A good wind blowing against a decent size antenna load above the roof could 
> push this entire chimney assembly over onto the ground.  As others have 
> suggested, a roof-top tower, properly tied into the roofing trusses, would be 
> a much safer alternative.
Roger (K8RI - ARRL Life Member)
N833R (World's oldest Debonair)


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