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01-21-2008, 11:06 AM
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Join Date: Mar 2007
Location: Chicago, IL
Posts: 1,155
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Antenna attachment to chimney prohibited?
Is there an NEC or IRC or other prohibition against mounting an antenna or mast to a masonry chimney above it's highest support (such as passage through a roof or above the eaves) or is this Just Not A Good Idea?
And if prohibited, what's the exception that allows a lightning rod there?
Last edited by Michael Thomas : 01-21-2008 at 11:22 AM.
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01-21-2008, 02:00 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,644
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Re: Antenna attachment to chimney prohibited?
From the 206 IRC.
- R1003.8 Additional load. Chimneys shall not support loads other than their own weight unless they are designed and constructed to support the additional load. Construction of masonry chimneys as part of the masonry walls or reinforced concrete walls of the building shall be permitted.
An antenna catches quite a bit of wind and will transfer that wind load to the chimney, so, while it is 'not a good idea', it could also be stated that 'it is not allowed' either.
A lightning rod, on the other hand, will transfer very little wind load to the chimney ... however ... I did not find the words 'except for very little loads' in there ... 
I guess it would come down to 'common sense' - if whatever is on / mounted to the chimney can cause some extra loading to the chimney and put it at risk ... 'not a good idea' and 'not allowed', but, if it is not going to place any load to speak of on the chimney, then ... you make the call. 
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01-21-2008, 03:48 PM
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Join Date: Mar 2007
Location: Chicago, IL
Posts: 1,155
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Re: Antenna attachment to chimney prohibited?
Thanks. as always for the quick response.
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01-21-2008, 04:54 PM
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Join Date: Oct 2003
Location: Rockwall Texas
Posts: 2,396
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Re: Antenna attachment to chimney prohibited?
How about a basketball goal, Jerry?
You think the constant hurling of the ball against the chimney would be an issue.
They had also run conduit up the side for some lighting.
Tree limbs noted.
rick
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01-21-2008, 05:10 PM
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Join Date: May 2007
Location: Illinois
Posts: 94
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Re: Antenna attachment to chimney prohibited?
Originally Posted by Rick Hurst
How about a basketball goal, Jerry?
You think the constant hurling of the ball against the chimney would be an issue.
rick
Hope Daryl Dawkins doen't come to visit!
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01-21-2008, 06:16 PM
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Join Date: Mar 2007
Location: San Mateo, CA
Posts: 1,103
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Re: Antenna attachment to chimney prohibited?
Around these parts a TV antenna mounted anywhere on a roof is a sign of social ineptitude. One either has a dish or cable, PERIOD!
I understand that in Florida it’s against the state building code due to their attracting hurricanes? |
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01-21-2008, 06:40 PM
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Join Date: Oct 2003
Location: Rockwall Texas
Posts: 2,396
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Re: Antenna attachment to chimney prohibited?
Jerry,
Totally wireless would be great.
Even the satellite dishes can be an eyesore at times.
rick
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01-21-2008, 10:57 PM
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Join Date: Mar 2007
Location: Oregon
Posts: 659
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Re: Antenna attachment to chimney prohibited?
Originally Posted by Rick Hurst
Jerry,
Totally wireless would be great.
Even the satellite dishes can be an eyesore at times.
rick
Around here I usually only see one dish per apartment complex.... and a bundle of 30 coax cables running from it.... I'm sure it's to cut down on the unsightliness of multiple dishes. |
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01-22-2008, 09:48 AM
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Join Date: Mar 2007
Location: Dallas, Texas
Posts: 1,579
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Re: Antenna attachment to chimney prohibited?
My daughter is in apartment management and they totally prohibit satellite dish installation. I can see now from Ricks photos that it might not be a bad idea after all.
__________________
Jim Luttrall
Mr. Inspector.net, Inc.
Allen, Texas 75002
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01-22-2008, 03:22 PM
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Join Date: Mar 2007
Location: Pa.
Posts: 577
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Re: Antenna attachment to chimney prohibited?
Nice zero clearance to the wood furring strips holding that basketball goal, too!
Bob
__________________
disgusted with some people on this forum. Out of here!
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01-23-2008, 11:09 AM
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Join Date: Mar 2007
Location: Tampa, Fl
Posts: 103
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Re: Antenna attachment to chimney prohibited?
Another practical reason: Wind causes the antenna to vibrate which makes the masonry chimney prone to deterioration.
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01-26-2008, 05:10 PM
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Join Date: Mar 2007
Posts: 32
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Re: Antenna attachment to chimney prohibited?
Sorry,
I'm tooling through these posts and I am just amazed at how obtuse and beyond real some of you people can get. This is the most non-issue issue I've read here yet.
I'm amused and concerned at the same time.
JLMathis
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01-26-2008, 08:41 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,644
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Re: Antenna attachment to chimney prohibited?
Originally Posted by Jeffrey L. Mathis
Sorry,
I'm tooling through these posts and I am just amazed at how obtuse and beyond real some of you people can get. This is the most non-issue issue I've read here yet.
I'm amused and concerned at the same time.
JLMathis
Jeffery,
You've lost me.
"I'm amused and concerned at the same time." about what? Your not understanding the ramifications? |
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01-26-2008, 09:15 PM
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Join Date: Mar 2007
Location: Barrington, IL
Posts: 396
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Re: Antenna attachment to chimney prohibited?
Now that it's mentioned, I think that I'm the only one in our neighborhood of 17 homes that has an antenna (it's on the chimney of course). And we've been on cable for several years!
__________________
Eric Barker
Moraine Woods Consulting, Inc.
Barrington, IL
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01-27-2008, 07:45 AM
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Join Date: Mar 2007
Location: Pa.
Posts: 577
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Re: Antenna attachment to chimney prohibited?
I remove them all the time. Usually the bricks are loose so the top of the chimney needs to be rebuilt. The closer together the bands, the higher the leverage and usually more damage. Also, once the bands rust away and it falls over, those tines can pierce the roof deck causing leaks. They have been known to make lightning rod terminals without the ground....
Bob
__________________
disgusted with some people on this forum. Out of here!
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