On Sep 26, 2014, at 8:36 02PM, Roger (K8RI) on TT <K8RI-on-TowerTalk@tm.net>
wrote:
> Don't forget that those guying forces plus are transferred to the base of the
> tower (roof) when the tower is self supporting. A guyed tower spreads the
> force over a wide area and the forces add algebraically between the guys.
> All of that force is transferred to the base anchor with a self supporting
> tower, so the roof will need to be much stronger than for a guyed tower.
All the more reason they need to engage a Professional Engineer. It’s
possible they shouldn’t even be _walking_ on the roof …
Bud, W2RU
>>>
>>> ----- Original Message -----
>>>
>>> From: tsharar@comcast.net
>>> To: towertalk@contesting.com
>>> Sent: Monday, September 22, 2014 9:58:48 PM
>>> Subject: [TowerTalk] Alternative Method of Tower Guying
>>>
>>> Towertalkians,
>>>
>>> We are planning to erect a tower for our club's DSTAR repeater antenna.
>>> This tower will consist [of] three ten foot Rohn 45G tower sections on the
>>> flat roof of a multistory building. The problem we have is that two of the
>>> three guy anchor points are under an adjacent structure roof overhang and
>>> will not allow us to guy the tower at or near the top. One of our club
>>> members has proposed a novel idea for deviating the guys around the roof
>>> overhang - please see the diagram below. Has anyone ever tried something
>>> like this before? Does this look like a good idea or not?
>>>
>>> Please note that this diagram is not to scale.
>>>
>>> 73 de Terry Sharar W3EDS
>>> Chair, Repeater Committee
>>> Montgomery Amateur Radio Club
>>> Rockville, MD
>>>
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