[TowerTalk] Cadwelding

[Gene Smar]

Jeff:

    I agree with George - R25/45/55/65 is probably too thin to Cadweld to directly.  Such high temps could weaken the metal at the place of welding and down she comes.

    When I worked as an engineer at my local electric utility company, our construction crews would Cadweld ground cables (2/0 or larger galvanized steel wires) to substation structural steel.  However, these members were inch thick slabs of solid steel so the heat of Cadwelding didn't harm them.  I believe (but don't have numbers to back this up) that solid steel towers ought to be capable of taking a direct Cadweld joint. 

BOTTOM LINE: DON'T DO IT.


73 de
Gene Smar  AD3F

From: "Dubovsky, George" <George.Dubovsky at andrew.com>
Date: 2007/06/27 Wed PM 03:45:29 CDT
To: Jeffrey Okamitsu <jokamitsu at yahoo.com>, Towertalk at contesting.com
Subject: Re: [TowerTalk] Cadwelding

It's a good idea if the leg wall is thick enough (and I don't know the
definition of thick enough)- I've seen it often on commercial towers.
BUT, I'm pretty sure Rohn 25/45 is way too thin for this.

73,

geo - n4ua

> -----Original Message-----
> From: towertalk-bounces at contesting.com [mailto:towertalk-
> bounces at contesting.com] On Behalf Of Jeffrey Okamitsu
> Sent: Wednesday, June 27, 2007 4:11 PM
> To: Towertalk at contesting.com
> Subject: [TowerTalk] Cadwelding
> 
> Anyone ever try cadwelding a ground wire directly to a
> tower leg?
> 
> Is this even a good idea?
> 
> 73.
> 
> Jeff, W3KL
> 
> 
> 
>
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