>
>
>.>>If this idea is not so far fetched would you use the 4000# or the 6700#
>>>>Phillystran given the top EHS guy is only a few feet below the top of the
>>>>tower.
>
>I would go with the comparable EHS diameter / strength, e.g 1/4" EHS in
>Phillystran such as 1/4" 6700 PSI. I have used Phillystran for, say, twenty
>years and have never had a problem, specifically breaking. I believe it
>to be a good as, if not better than
>comparable steel EHS>
>>>Larry WI5A
>
>>>If you
>>>really do not want to deviate from anything Rohn shows in their catalog,
>>>then you had better not use Phyllystran since I have never seen any mention
>>>of it in any Rohn book I have ever seen . . .
>>>
>
>>Stan w7ni@teleport.com
>
>
>I rather doubt you will EVER see Rohn spec something like Phillystran.
>There is a risk IF CARELESS of cutting the Phillystran cable cover when in
>particular, lowering antennas and having the covering scraped or cut by
>nuts/bolts/sharp edges of the antenna. Construct your antenna to not have
>any nuts facing down or sharp edges. Watch very close when elements are in
>proximity to the Phillystarn.
>
>It is recommended that EHS be installed near to the guy post so as to avoid
>the 'Philly' catching fire in the event of a grass fire.
>
>I consider both of these situations rather minor, if proper recautions are
>taken.
>
>Anticipating hanging wires off your tower...sometime in the future: Philly
>is the only way to go to avoid any interaction, etc. at least for the first
>30 feet or so FROM the tower.
>
>73 de Mike R3/K5UO
> Moscow
>bragassa@glasnet.ru
>bragassa@hal-pc.org
Point well taken. I think this goes to show that not all the good ideas for
installing Rohn tower are shown or even mentioned in the Rohn Catalogs.
Almost every installation I have seen deviates from the Rohn book in some
way or another. This is not necessarily bad if you have a qualified PE
looking over your shoulder when you do it to make sure what you are doing is
safe.
Stan w7ni@teleport.com
--
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|