[TowerTalk] US TOWER HDX-89 / Tash DX86 Wind Rating Differences

[Clay Autery]

There is a metric crap-tonne of reasons why one would be rated higher
than others....  I shudder to consider compiling the list.

______________________
Clay Autery, KY5G

On 6/10/2017 9:00 AM, Richard Thorne 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