Lightning Protection for Glass Roof

Deebee101 said:
It is just a preliminary design in a 3rd world country. Just need ideas on where to place the lightning rods and where to run the down conductor. The eventual design will be looked at by an expert, even if it means bringing them in from the US or UK or Germany.
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Since it is only a prelim, why do you need to call out anything more than "Lightning Protection System By Others"? It seems to me that providing anything more specific or elaborate than that would just be a waste of your time.
 
One of my college professors was a UL lightning expert and had written a book on lightning phenomena. Lightning hits the earth globally about 8 million times per 24 hours, according to him. He says lightning rods are useless and do not redirect strikes, they can only create a pathway and even then it sometimes will not follow the path of least resistance.

There is an 1860s era built hotel near me that had old school twisted steel lightning rods and lightning pathways to a grounded rod. Around 2008 it was struck by lightning on the outside cement corner of the brick building and exploded a bunch of bricks, cement and limestone onto the side walk. Happened in the middle of the day and was witnessed by some. The rods did nothing to redirect the discharge.
 

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Try this
 
ggunn said:
Since it is only a prelim, why do you need to call out anything more than "Lightning Protection System By Others"? It seems to me that providing anything more specific or elaborate than that would just be a waste of your time.
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It helps with getting a permit in my country. The prelim design has to show some key drawings and it has to make sense at least. Can't put lightning rods in a pool for example. I am done with the other drawings except lightning.
 
Deebee101 said:
Is there any other forum I can find experts on LPS?
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Do a search of IEEExplore for lightning protection papers.

Really only 2 design criteria - rods at highest point, down conductor straight. No bends or corners -- magnetic forces from a few hundred kA for the top few percentile strikes will BREAK the conductor if it has bends, no fusing worries. <G>
 
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