[Antennas] RE:Re-bar "Cage" To Use For Your Tower

2002年9月10日 09:27:20 -0500

SNIP
>The book that I was thinking of is:
>>The GROUNDS for LIGHTNING and EMP PROTECTION
>by Richard R. Block
>>Published by Polyphaser back in '87.
>(and no...Im not plugging nor selling Polyphaser products at all...they
>just published Blocks work)
>>A quick scan didn't reveal any mention of using the tower base concrete
>as an Uffer ground.....and that could be related to any derived
>"reduction" in strength due to welding of the rebar.
>>They do have an illustration showing 3 Uffer's located around the base
>structure and the guy end point structures.
>>The book gave me some pretty good insight into the mechanics of a
>lightning strike and what it takes to dissapate that much energy.
>SNIP
Use caution and good judgement routeing a lightning down lead into the 
concrete base supporting a tower for a ground. Preferredly don't! A 
lightning hit can produce some spectacular results to your concrete! Route 
the lead to ground bypassing the concrete. If you must (for some unknown 
reason) route the lightning ground downlead through the base construct 
provide a open conduit for routeing this lead.
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