[TowerTalk] Tack welding rebar

[David Gilbert]

That's a long-debunked urban legend.  Don't believe me?  Do some web 
searching, including the archives of this very forum.

Besides, there is nothing ... nothing ... in any description of a Ufer 
ground that requires welding the rebar together.  Crossed and tied 
connections do just fine.

73,
Dave   AB7E



On 1/3/2014 7:52 PM, Stan Labinsky Jr. wrote:
> On another tack, from what I've read, not having the rebar 
> interconnected, that is, welded to itself and to the tower bolts is a 
> recipe for concrete block destruction from steam bursts during a 
> lightning strike, when strike current jumps over the poor/marginal 
> interconnects and creates huge point sources of heat within the block.
>
> Welding also makes the block into a Ufer ground.
>
> Stan
>
> -----Original Message----- From: Patrick Greenlee
> Sent: Friday, January 03, 2014 9:35 PM
> To: towertalk-bounces at contesting.com ; towertalk at contesting.com
> Subject: Re: [TowerTalk] Tack welding rebar
>
> Maybe the majority would have to lug lots of heavy gear but I have a 
> plasma
> cutter, 180 amp Mig, AC/DC stick welder, grinder, vise, O-A bottles,
> Argon-CO2 bottle, 14 inch cutoff saw, and on and on and on all on my 
> single
> axle welding trailer which is not hard to hitch up and get close to just
> about anywhere on the ranch including antenna farm endeavors. I don't 
> think
> I am unique.
>
> Point 2:  wire tied cages of rebar are not nearly as robust as 
> welded.  It
> is darned inconvenient to have rebar messed up under the forces 
> involved in
> pouring concrete.  Dimensional tolerances are much easier to maintain 
> with
> weldments.  Wire tied rebar is a very good thing with flat work like 
> slabs,
> aprons, patios, sidewalks, and the like but more 3 dimensional work is
> sometimes approached easier and with more confidence with at least some
> welding.  Must you weld? NO, but if you can it is sometimes better for 
> any
> of several reasons.
>
> Patrick NJ5G
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