If you use 4 guys instead of 3, it might help. Perhaps 4 posts, one at
each corner of the house could extend 10 feet or so above the roof to give
you a better guying angle.
Chuck W5PR
On Wed, Aug 26, 2015 at 5:23 AM, Marsh Stewart <marsh@ka5m.net> wrote:
> Your English is much better than my Spanish.
>
> 14-foot guying radius is only 46% of 30-feet. Recommended guying radius is
> typically 80%. At 20-feet up a 14-foot guying radius is 70%.
>
> Can the base (roof) withstand the downward forces of the guyed tower?
>
> What is your wind zone?
>
> What size in wind-load area (how many square-feet) is the antenna system
> you
> want to put up (including antenna, mast, and rotator)?
>
> One possible alternative if you have enough space on your roof might be a
> lower (closer to the roof) vertically oriented Yagi for your favorite band.
>
> If possible consulting with a professional engineer would be a good idea.
>
> 73,
> Marsh, KA5M
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> Douglas Ruz (CO8DM)
> Sent: Tuesday, August 25, 2015 11:07 PM
> To: Drax Felton
> Cc: towertalk@contesting.com
> Subject: Re: [TowerTalk] How many tower sections i can install??
>
> Sorry for my english,
>
> I can not change the distance from the base to the anchor points...it is 14
> ft only.
>
> My question is:
>
> Can install 3 tower sections (10ft long each) if my anchor points are 14 ft
> from the base ???
>
> any idea??
>
> Please, excuse my english.
>
> 73....Douglas, CO8DM
>
> "No creo que haya alguna emoción más intensa para un inventor que ver
> alguna
>
> de sus creaciones funcionando. Esa emoción hace que uno se olvide de comer,
> de dormir, de todo." - Nikola Tesla
>
>
> ----- Original Message -----
> From: "Drax Felton" <draxfelton@gmail.com>
> To: "'Douglas Ruz (CO8DM)'" <co8dm@frcuba.co.cu>
> Sent: Tuesday, August 25, 2015 11:40 PM
> Subject: RE: [TowerTalk] How many tower sections i can install??
>
>
> Yes of course you can use other base sizes. 3 sections of 25g is hardly
> anything to worry about and only needs guys at the top.
> And then only if you don't do a bracketed install.
>
>
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
> Douglas Ruz (CO8DM)
> Sent: Tuesday, August 25, 2015 10:15 PM
> To: towertalk@contesting.com
> Subject: [TowerTalk] How many tower sections i can install??
>
> Hi,
>
> I would like read your ideas.
>
> I have few 10 ft section of a tower (it is like a Rohn 25G).
>
> I would like install few section over some part of my roof...The roof is
> concrete...as you know many house in the Caribbean has concrete roof ...it
> is 24ft by 40ft...so, i have calculating and the distance from the base to
> the guy anchors is 14 ft !!!
>
> I know the distance from the base to anchor points is 70 % of the tower
> height...so, 70% of 20 ft is 14ft, that´s mean 2 tower sections...right
> ??...Is it possible install 3 sections adding more guy´s set ???
>
> Thanks,
>
> 73....Douglas, CO8DM
>
>
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>
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>
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