[TowerTalk] [Bulk] Re: tower insulators

[Stan Stockton]

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 at 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 at contesting.com] On Behalf Of Bob
>> Naumann W5OV
>> Sent: Saturday, August 30, 2014 2:33 AM
>> To: Steve Maki
>> Cc: towertalk at 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 at kk9a.com wrote:
>>> 
>>> 
>>>> Are you getting back into contesting Steve?  What about these?
>>>> http://www.arraysolutions.com/Products/towerinsulators.htm
>>>> 
>>>> 
>>>> Try emailing W5OV, BonN at arraysolutions.com
>>>> 
>>>> From:    Steve Maki <lists at 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.
>> 
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