[TowerTalk] New Tower Old Base

[Jim W7RY]

If its a guyed tower, you don't need any bolts. Take a look at the Rohn 25, 
45 and 55 pier pins.  A simple single pin in the center of the base plate is 
all that is required. Take a look at the Rohn info.

All of the force of a guyed tower is down. There is little to no lateral 
force at the base.

73
Jim W7RY


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From: "Robert Harmon" <k6uj at pacbell.net>
Sent: Wednesday, February 09, 2011 12:16 AM
To: "EZ Rhino" <ezrhino at fastmovers.biz>
Cc: <towertalk at contesting.com>; "Richard Zalewski" <dick.w7zr at gmail.com>
Subject: Re: [TowerTalk] New Tower Old Base

> If it is guyed tower then epoxying in anchor bolts should be a good 
> solution
> provided they are sized properly.
> If it is a self supporting tower it is a different ball game and it would 
> be wise to have the tower connection
> to the concrete footing reviewed by a structural engineer.  There is 
> tremendous stress exerted on the anchor bolts
> of a self supporting tower.  If the tower is 70 feet high, visualize a 70 
> foot pry bar pulling on the anchor bolts.  The anchor
> bolts are a critical part of the footing design.  My self supporting tower 
> has (2) 1 1/4" diameter by 3 1/2 foot long J bolts with
> a 6" hook on the lower end at each of the three corners that are cast in 
> the concrete footing.
>
> 73,
> Bob
> K6UJ
>
>
> On Feb 8, 2011, at 6:07 PM, EZ Rhino wrote:
>
>> Keep the information on the list; I want to know more about this as well.
>>
>> A local here upgraded from a 50' to a 70' tower, and did this very thing. 
>> He used some kind of an epoxy to glue in the bolts.  Obviously the base 
>> has to be large enough to do this.  So far so good.
>>
>> Chris
>> KF7P
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> On Feb 8, 2011, at 15:54 , Richard Zalewski wrote:
>>
>> I will be upgrading my tower and will be using my existing base.  This 
>> will
>> require drilling the existing concrete base and epoxing in some new 
>> bolts.
>> I would be interested in exchanging some emails with someone who has done
>> this.
>>
>>
>> -- 
>> Tnx es 73
>> Richard W7ZR
>> www.w7zr.com
>>
>> *WHAT HAVE YOU DONE WITH WHAT YOU HAVE BEEN GIVEN?*
>> _______________________________________________
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>>
>>
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