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#25183 - 04/30/03 01:34 PM Air terminals  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
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 02:41 PM Re: Air terminals  
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
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).]


Ron

#25185 - 04/30/03 04:27 PM Re: Air terminals  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Air terminals are the little pokey things that point upwards.

    [Linked Image]

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



[This message has been edited by Bjarney (edited 04-30-2003).]


#25186 - 04/30/03 04:30 PM Re: Air terminals  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
Thank you Ron.


#25187 - 05/01/03 02:41 AM Re: Air terminals  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,222
SI,New Zealand
Bjarney,
Thats a pretty "graphic" warning sign you've got there, I can just feel the pain, looking at the sign!. [Linked Image]

[This message has been edited by Trumpy (edited 05-01-2003).]


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#25188 - 05/01/03 11:21 AM Re: Air terminals  
Frank Cinker  Offline
Member
Joined: Jul 2001
Posts: 311
Pennsylvania
Bjarney-

Thank you for graphic and text.


#25189 - 05/01/03 01:24 PM Re: Air terminals  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
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


Don(resqcapt19)

#25190 - 05/01/03 03:34 PM Re: Air terminals  
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
White Plains, NY
Don,
How about this one? http://www.harger.com/catalog2002/2_2_5.pdf
This is the one I currently spec.


Ron

#25191 - 05/01/03 03:54 PM Re: Air terminals  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
Ron,
The one I was thinking about was a mushroom shape, but that one will also prevent the problem.
Don


Don(resqcapt19)

#25192 - 05/01/03 05:55 PM Re: Air terminals  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
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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