Yep, sometimes its a good thing to live inland (away from hurricanes) on
a super flat, wooded land with lots of 1-story buildings in the near
field (I'd prefer trees over buildings).... MOSTLY protected from the
plains tornadoes by the Ozarks and Ouachitas with ground as close to
salt water as you can get without doping the entire near field. :-)
J/K, but yeah... read up on Revision G, and make sure you pin down
exposure class, wind speed requirement, etc... It makes a monumental
difference sometimes.
AND don't forget that overhead is great if you can afford it... (40 sq
ft when you only need 20 sq ft = 50% overhead, etc, etc.)
73,
______________________
Clay Autery, KY5G
On 6/10/2017 10:20 AM, Rob N1KEZ wrote:
> Make sure you know what the wind ratings are for your area before getting
> excited about a particular tower. Manufacturers assume you live in the most
> favorable place. Wind rating for my tower location turned out not to be 90
> Mph but 130Mph! (Ridge crest/Slope etc).
>
> 73!
> N1KEZ de Rob
>
> Sent from my mobile device.
> Pse excuse brevity and any errorz.
>
> On Jun 10, 2017, at 7:00 AM, Richard Thorne <rthorne@rthorne.net> wrote:
>
> This may not be comparing apples to apples but here's my question after
> studying the two towers.
>
> US Tower HDX-89 claims 9.2 sq ft of max allowable antenna wind area 90 mph 3
> second gust
> Tash DX86 claims 21 sq ft of max allowable antenna wind area 85 mph 3 sec
> gust
>
> After looking at both designs they both start with a lower section that is
> 28.75" wide and a top section that is 13 7/8" (Tash) and 13 15/16" (US Tower)
>
> So the designs appear to be the same, why are the allow able antenna wind
> loads so different? I realize that one is based on 90 mph the other on 85
> mph. Does the 5 mph delta add up to a 11.8 sq ft difference?
>
> Thanks in advance.
>
> Rich - N5ZC
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