[TowerTalk] Tower grounding

[David Gilbert]

I'm puzzled.  Are you under the impression that I disagree with that, or 
that it contradicts what I wrote?

73,
Dave   AB7E



On 7/17/2013 7:40 PM, Steven H Sawyers (na0ia) wrote:
> ACI code requires the concrete to have a minimum of 3" of "cover" 
> concrete whether between the rebar and the outside world - either the 
> concrete form or the ground. This "cover" allows the full strength of 
> the rebar to be utilized in the structure.
>
> Steve NA0IA
>
> At 08:55 PM 7/17/2013, David Gilbert wrote:
>
>> Your hysterics aside, almost all of that is patently false, and in 
>> most locations is directly contrary to code.  You really need to 
>> study what a Ufer ground is and why they work.
>>
>> By the way, this same old wives tale comes up every so often here and 
>> on other forums, and each time it does I spend about a half hour 
>> doing Google searches to find any documented instances of a block of 
>> concrete exploding because of steam expansion from a lightning 
>> strike.  I have found TONS of discussion and endless repetitions of 
>> the same old exhortation you just made, but not a single first hand 
>> account of exploding concrete due to steam. Concrete is quite brittle 
>> and fractures easily, and I could far better imagine that the intense 
>> thermal shock generated by a lightning hit would instead be the 
>> culprit.  I have indeed witnessed first hand a lightning strike 
>> blasting a chunk out of solid granite rock alongside the road I was 
>> driving on (scared the hell out of me), and I guarantee that rock was 
>> dry as a bone.
>>
>> Dave   AB7E
>>
>>
>>
>>
>> On 7/17/2013 9:18 AM, Skip K3CC wrote:
>>> I'm not sure I understand the thread however,  NEVER EVER, ground 
>>> anything
>>> into the concrete base !!!!!!!    NEVER use any ground rods in 
>>> concrete !!!!
>>>
>>> If you would get a lightening strike, the current would carry into 
>>> the concrete
>>> and boil off the water.  When this happens the concrete will explode 
>>> !!!
>>>
>>> de Skip K3CC _______________________________________________
>>
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>>
>>
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