Stan,
So you use 3/8 fiberglass rod into each leg and the rods go into the concrete?
If you have photos, that would be helpful.
73,
Gordon, W2TTT
201.314.6964
Sent from Samsung tablet
-------- Original message --------
From: Stan Stockton <wa5rtg@gmail.com>
Date: 2014/09/01 11:35 (GMT-05:00)
To: Grant Saviers <grants2@pacbell.net>
Cc: "J. Gordon Beattie, Jr., W2TTT" <W2TTT@ATT.NET>,towertalk@contesting.com
Subject: Re: [TowerTalk] [Bulk] Re: tower insulators
I have four 60 foot 25G towers that have a solid rod of fiberglass in each
leg. These towers were in guyed for several years in a pretty harsh
environment on top of a mountain. After having grade. 8 bolts break several
times I then bridged the upper and lower sections on each leg with a piece of
fiberglass plate which is something like 4 inches wide, a foot long and about.
3/8 thick. It is held with galvanized. U bolts. After seeing the towers bend
in about a. 60 mph wind, I used 3/8 fiberglass rod to guy them to small,
homemade anchors - rod welded to a short piece of angle. Each anchor is in
about a bag of Quickcrete.
Sent from Stan's IPhone
> On Sep 1, 2014, at 10:12 AM, Grant Saviers <grants2@pacbell.net> wrote:
>
> The max wind combined guy loads for a 100' tower can be around 4000#
> downforce on the tower base (plus the tower weight) so something more than 1"
> delrin will be required between the legs. That amount of force obviously
> works ok with the tapered pier pin base, but the leg span of straight R25 or
> larger will require some steel structure behind whatever insulator is used.
> I think modifying a tapered pier pin base section bottom plate for an
> insulator block of delrin/nylon would be easier/cheaper.
>
> Grant KZ1W
>
>
>> On 9/1/2014 7:29 AM, J. Gordon Beattie, Jr., W2TTT wrote:
>> Bob, Steve et al,
>>
>> Any thoughts on what might be a good approach to insulating a Rohn 25 tower
>> from the ground?
>> I was thinking of a pin base in a lower slab of nylon or delrin insulating
>> material sandwiched with another upper slab of insulating material that has
>> bolts into the tower legs. These could be bolted together at the corners.
>> When I say, "slab" I am thinking about 0.5-1.0 inches in thickness.
>>
>> My concerns are that the might be stronger and possibly cheaper. Any
>> thoughts?
>>
>> 73,
>> Gordon, W2TTT
>> 201.314.6964
>>
>>
>> -----Original Message-----
>> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Bob
>> Naumann W5OV
>> Sent: Saturday, August 30, 2014 2:33 AM
>> To: Steve Maki
>> Cc: towertalk@contesting.com; 'Bob Naumann W5OV'
>> Subject: Re: [TowerTalk] tower insulators
>>
>> The insulators that you found through an obsolete link are no longer
>> available.
>>
>>
>> Sorry!
>>
>> Bob W5OV
>> Array Solutions
>>
>>
>>> On Fri, August 29, 2014 9:16 pm, Steve Maki wrote:
>>> John,
>>>
>>>
>>> Thinking about it, of course I've been thinking about it for a few
>>> years now :)
>>>
>>> Yes, I saw the Array Solutions solution, and WB0W's, both of which
>>> look viable. I only tried contacting them via their web page contact
>>> gadgets which aren't always monitored by online stores.
>>>
>>> I'll try a direct email, thanks.
>>>
>>>
>>> -Steve K8LX
>>>
>>>
>>> On 8/28/2014 9:45 PM, john@kk9a.com wrote:
>>>
>>>
>>>> Are you getting back into contesting Steve? What about these?
>>>> http://www.arraysolutions.com/Products/towerinsulators.htm
>>>>
>>>>
>>>> Try emailing W5OV, BonN@arraysolutions.com
>>>>
>>>> From: Steve Maki <lists@oakcom.org>
>>>> Date: Thu, 28 Aug 2014 18:24:33 -0400
>>>>
>>>> Does anyone know if there is a currently available commercial leg
>>>> insulator for Rohn 45 tower? I've seen reference to products from
>>>> Array Solutions and WB0W, but didn't get replies to my inquires, and
>>>> I'm guessing they were/are not big sellers.
>>>>
>>>> I can fab them myself from fiberglass rod and protect them with an
>>>> umbrella of some sort, but would rather save the time with an off the
>>>> shelf product.
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>>
>> _______________________________________________
>>
>>
>>
>> _______________________________________________
>> TowerTalk mailing list
>> TowerTalk@contesting.com
>> http://lists.contesting.com/mailman/listinfo/towertalk
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|