[TowerTalk] New Tower Old Base

[Robert Harmon]

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
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> 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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