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Question on construction jessica10x 01-19-2007
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Posted by on January 19, 2007, 6:06 pm
Question on construction

I have seen a few posts on chimneys recently in this group.

What is the general rule on chimneys in terms of height ?

How much higher than the roof do they have to be ?
Can they be in line with the roof ?

Is there a law on this ? especially in N. California ?

Thanks
Jessica


Posted by Don on January 19, 2007, 6:11 pm
jessica10x> wrote
> Question on construction
>
> I have seen a few posts on chimneys recently in this group.
>
> What is the general rule on chimneys in terms of height ?
>
> How much higher than the roof do they have to be ?
> Can they be in line with the roof ?
>
> Is there a law on this ? especially in N. California ?
>
> Thanks
> Jessica

The top of the chimney flue must be 3' higher than any portion of roof
within a 10' radius of said flue.
SW FL *rule*.



Posted by HVS on January 19, 2007, 6:50 pm
On 19 Jan 2007, Don wrote

> jessica10x> wrote
>> Question on construction
>>
>> I have seen a few posts on chimneys recently in this group.
>>
>> What is the general rule on chimneys in terms of height ?
>>
>> How much higher than the roof do they have to be ?
>> Can they be in line with the roof ?
>>
>> Is there a law on this ? especially in N. California ?
>>
>> Thanks
>> Jessica
>
> The top of the chimney flue must be 3' higher than any portion
> of roof within a 10' radius of said flue.
> SW FL *rule*.

And a bloody good basic rule, too -- not one of those desk-generated
jobs, that one.

(It's odd how homeowners who want to build fires sometimes want to
minimise the uncomfortable fact that fires and chimneys are.....hot.
go figure, 'n' all that.)

--
Cheers, Harvey
Architectural and topographical historian

For e-mail, change harvey to harvey.van

Posted by Roarmeister on January 19, 2007, 7:22 pm
wrote:

>jessica10x> wrote
>> Question on construction
>>
>> I have seen a few posts on chimneys recently in this group.
>>
>> What is the general rule on chimneys in terms of height ?
>>
>> How much higher than the roof do they have to be ?
>> Can they be in line with the roof ?
>>
>> Is there a law on this ? especially in N. California ?
>>
>> Thanks
>> Jessica
>
>The top of the chimney flue must be 3' higher than any portion of roof
>within a 10' radius of said flue.
>SW FL *rule*.

That, plus if chimney is within 3m (10') of the peak it has to be .6m
(2') above the peak. Canadian rule. :-)

Posted by RicodJour on January 19, 2007, 7:35 pm
jessica10x@gmail.com wrote:
> Question on construction
>
> I have seen a few posts on chimneys recently in this group.
>
> What is the general rule on chimneys in terms of height ?
>
> How much higher than the roof do they have to be ?
> Can they be in line with the roof ?
>
> Is there a law on this ? especially in N. California ?

What sort of chimney? Different rules can apply.

The International Residential Code requires a chimney height above the
roof plane penetration of three feet, and the top must be two feet
higher than any roof surface within ten feet (measured horizontally,
not along the roof line). I'm not sure if your area uses the UBC or
the IRC so call your local building department for verification.

If you're talking about a prefab metal chimney follow the
manufacturer's sizing charts for flue sizing. If you're planning a
masonry chimney and fireplace follow the guidelines for flue size,
firebox and throat dimensions to insure an efficient draft.

BTW, there's a two question limit to newbie posting. Your post had
_five_ ? marks. That's far over the limit. Normally there'd be stiff
penalties, but hey, I'm on Grand Jury duty this month and I'm feeling
magnanimous. No fine this time, but you'll have to offer three answers
to correct the imbalance.

R


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