I am not an engineer but I would say that an equalizing plate prevents the
tower legs from pulling apart and the only stress on the tower is downward.
Equalizing plates are not necessary if the cross bracing and legs are
sufficiently strong. As an example my Rohn 65G tower just uses guy brackets
that are simply bolted to each leg of the tower with U-Bolts.
John KK9A
-----Original Message-----
From: David Aslin G3WGN [mailto:david@aslinvc.com]
Sent: Saturday, August 04, 2018 1:37 PM
To: john@kk9a.com; towertalk@contesting.com
Subject: RE: [TowerTalk] Equalizer plate dimensions
Understood John. The tower is an industrial version of a Versatower, the most
common tower type in UK. All Versatowers are guyed.
The particular towers I have are trailer mounted for temporary cell-site use,
made I believe for France Telecom. They are much larger than the typical skinny
Versatowers that are usually available here. There are guy points on all
sections.
Perhaps an engineer can explain to me the reasoning behind the use of equalizer
plates. It makes intuitive sense to me that under wind stress conditions,
since on a crank up tower the relative positions of the sections and hence the
guying points on the tower will move relative to each other, that this relative
movement is compensated somehow. But intuition can be wrong.
73, David G3WGN M6O
-----Original Message-----
From: john@kk9a.com [mailto:john@kk9a.com]
Sent: 03 August 2018 21:18
To: towertalk@contesting.com
Subject: Re: [TowerTalk] Equalizer plate dimensions
It has been a long time since I have looked at a crank-up tower however I seem
to recall heavier steel that went around the top of each section. If that is
the case I see no reason for an equalizer plate plus adding plates may prohibit
the tower from completely retracting. If it is really meant for guys, perhaps
there are attachment points. I am hoping that the sections somehow lock before
tightening the guys.
John KK9A
To: Tower Talk <towertalk@contesting.com>
Subject: [TowerTalk] Equalizer plate dimensions
From: David Aslin G3WGN <david@aslinvc.com>
Date: Thu, 2 Aug 2018 20:43:45 +0000
Hi Towertalkians,
I have a pair of telescopic towers that are similar in size to a US Tower
HDX-589. The manufacturer specifies guying at 3 levels, but does not provide
equalizer plates. I'm mindful of the Towertalk prime directive, but as the
manufacturer is no longer in business, I can't consult them on this topic.
Seems to me that equalizer plates are a wise precaution at this high wind
location, but I'm open to the wisdom of the Towertalk crowd.
In order to fabricate some 3-way equalizer plates I need dimensions of, for
example, the Rohn equalizer plates. Would any kind soul care to measure theirs
or provide a specsheet that shows plate thickness, hole sizes and placements?
The Rohn catalog is silent on the key points!
73, David G3WGN M6O
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