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#25183 - 04/30/03 10:34 AM Air terminals
Frank Cinker Offline
Member
Registered: 07/29/01
Posts: 311
Loc: Pennsylvania
What are air terminals as they relate to lightning protection? I've never worked with air terminals or even seen them before.
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#25184 - 04/30/03 11:41 AM Re: Air terminals
Ron Offline
Member
Registered: 03/13/02
Posts: 582
Loc: White Plains, NY
An air terminal is the rod that stands on top of the roof/parapet/equipment/etc.
You might know it as a lightning rod.

See NFPA 780
In a NFPA compliant system you will find many of these at the roof/etc.

[This message has been edited by Ron (edited 04-30-2003).]
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#25185 - 04/30/03 01:27 PM Re: Air terminals
Bjarney Offline
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Registered: 04/10/02
Posts: 2527
Loc: West-Southern Inner-Northeast ...
Air terminals are the little pokey things that point upwards.

   

http://www.harger.com/catalog2002/2_2_1.pdf



[This message has been edited by Bjarney (edited 04-30-2003).]
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#25186 - 04/30/03 01:30 PM Re: Air terminals
Frank Cinker Offline
Member
Registered: 07/29/01
Posts: 311
Loc: Pennsylvania
Thank you Ron.
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#25187 - 04/30/03 11:41 PM Re: Air terminals
Trumpy Offline


Member
Registered: 07/05/02
Posts: 8211
Loc: SI,New Zealand
Bjarney,
Thats a pretty "graphic" warning sign you've got there, I can just feel the pain, looking at the sign!.

[This message has been edited by Trumpy (edited 05-01-2003).]
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#25188 - 05/01/03 08:21 AM Re: Air terminals
Frank Cinker Offline
Member
Registered: 07/29/01
Posts: 311
Loc: Pennsylvania
Bjarney-

Thank you for graphic and text.
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#25189 - 05/01/03 10:24 AM Re: Air terminals
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2148
Loc: IL
There new air terminals available that have a "mushroom" type head to eliminate the impalement hazard. I didn't see them in the catalog that BJ linked to, but I know that that company has them because the first time I saw them was at their booth at a trade show.
Don
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#25190 - 05/01/03 12:34 PM Re: Air terminals
Ron Offline
Member
Registered: 03/13/02
Posts: 582
Loc: White Plains, NY
Don,
How about this one? http://www.harger.com/catalog2002/2_2_5.pdf
This is the one I currently spec.
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#25191 - 05/01/03 12:54 PM Re: Air terminals
resqcapt19 Offline
Member
Registered: 11/10/00
Posts: 2148
Loc: IL
Ron,
The one I was thinking about was a mushroom shape, but that one will also prevent the problem.
Don
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#25192 - 05/01/03 02:55 PM Re: Air terminals
SvenNYC Offline
Member
Registered: 08/19/02
Posts: 1691
Loc: New York City
I thought the reason a lighting rod comes to a point is becaue it seems to "attract" the lightning bolt better?

If this is true (I don't know), wouldn't this make a blunted rod less effective?

If it doesn't matter....why make the tips so sharp?
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