Help with class A

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BillsWS

Feeling the Heat
Dec 20, 2011
275
U.P. Michigan
Hello. Do you know of a brand of class A that uses a clamp/screw on ring to support the first piece of chimney in the ceiling box? I'm not sure if that is clear, but I thought I saw a ceiling box where the class A chimney could be extended below the ceiling box by the placement of a ring clamped and/or screwed to the first piece of chimney pipe. We are thinking that set-up might work in our situation but I can't find the site I had seen it on.
 
That sounds like Selkirk Supervent with a cathedral ceiling support box. What is the problem you are trying to solve Bill?
 
BeGreen, I am trying to solve how to support 30 ft. of chimney above a T while keeping the top of the horizontal part of the T approximately 6 - 7" from my ceiling.
 

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You can use a metalbestos RSK kit. That will allow you to hang a class A tee inside of the room. Just use a Metalbestos trim collar to trim out the hole. I'd say a good majority of hearth shops sell these components. I'd call around the local ones, find out who sells metalbestos and ask them if they have a part #RSK or 6T-RSP (Basically an RSK preinstalled on an 18" of class A)

Once you see this item in person, you'll find it is exactly what you need.
 
(broken link removed to http://www.selkirkcorp.com/WorkArea/showcontent.aspx?id=8552)

Try that link there for a better idea
 
That is a roof support system. Can it also be used on the bottom end? Won't there need to be a firestop there, and at each floor penetration? I'm wondering if Security's floor support would be a better solution?

With that corner location it's going to be important to watch clearances. The class A will need a minimum of 2" from any combustible. Double-wall pipe 6", single-wall 18".
 

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Yup, I verified with Metalbestos and they sent me documentation that the roof support can be used in this manner. You use a metalbestos trim collar on the ceiling side and a firestop at the top side.
 
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