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soulpatch
Nomad
Posts: 404
Registered: 7-30-2005
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Essentially a giant Ufer ground. It's all in the potential
| Quote: | Originally posted by capt. mike
| Quote: | Originally posted by vandenberg
That's probably why you see so many buildings with their roofs blown off. No lightning rods.
Give me a break !! |
time during summer monsoon T storms when they allow a discharge path up thru the structure because they DON"T have a grounding rod at the top (roof)
closest to the available potential differential charge - wet unstable air.
and something else - concrete footings and stems are highly conductive - basically a concrete bldg foundation, even CMU block, acts like a huge flow
thru conductor for DC.
so - a bldg is sitting in the ground accumulating potential DC and lets it go upwards to a receptor through the least resistive path. Living things
are a conductor. wood and trees are all conductors to a degree.
this is rocket science. do not attempt to debunk it!! 
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dtbushpilot
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Guess I can wear my tin foil hat during thunderstorms after all....dt
"Life is tough".....It's even tougher if you're stupid.....
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vandenberg
Elite Nomad
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Registered: 6-21-2005
Location: Nopolo
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Mood: mellow
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| Quote: | Originally posted by dtbushpilot
Guess I can wear my tin foil hat during thunderstorms after all....dt |
Sure...and sit on the roof.... but watch your a$$.
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Skeet/Loreto
Ultra Nomad
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owodd;
General Adjustment Bureau
Manager Bishop Calif. Office
Claims Manager Associated Aviation Underwrtiers- San Francisco
Partner Jay Wright Adjusters Oakland Calif.
What a Ride; Good work. Met lots of great People!
Skeet
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nobaddays
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Lightning is a fascinating part of weather, and I'll try to explain positive
and negative lightning strokes. But first, you should visit this link, and
read a detailed, but non-technical explanation of how lightning forms. It is
very interesting. Here is the link:
http://www.howstuffworks.com/lightning.htm
The differences between positive and negative strokes is not discussed in
detail in the link. Most cloud-to-ground strikes are negative, and a much
less common number are positive. The only difference between the two kinds
is the reversal of polarities in the cloud base. Normally the negative
charge collects in the cloud base, with a corresponding net positive charge
in the ground under the cloud. Lightning strikes originating from this
configuration are negative strikes.
But if the cloud base becomes positively charged relative to the top of the
cloud, the ground below then assumes a net negative charge, and any
lightning that develops will be a positive strike.
The lightning detection sensors used by many data observation and collection
organizations are able to distinguish between positive and negative strikes,
and report them as such. Research is ongoing, to determine if there is a
relationship between positive strokes and certain types of severe weather.
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vgabndo
Ultra Nomad
Posts: 3461
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Location: Mt. Shasta, CA
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Mood: Checking-off my bucket list.
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The question was: why do CHURCHES need lightning rods, not why do buildings need lightning rods. Perhaps Skeet answered on the OTHER thread.
Undoubtedly, there are people who cannot afford to give the anchor of sanity even the slightest tug. Sam Harris
"The situation is far too dire for pessimism."
Bill Kauth
Carl Sagan said, "We are a way for the cosmos to know itself."
PEACE, LOVE AND FISH TACOS
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