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Forums» International Building and Residential Codes -- Non-Structural Issues» Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction

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Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction
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Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  peach!!

Posts: 0

5/16/2007 3:40:00 AM

You may be able to reduce the exterior wall protection requirements based on Table 602; fire separation distance. Generally speaking, however, the damper is required if you actually need the 3 hour protection


   

Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  Builder bob

Posts: 0

5/16/2007 6:27:00 AM

The damper may not be required...the applicable section to reference would be IBC section 704 Exterior walls....See T. 704.8 of the IBC.

Just because the construction components are required to be of rated construction, does not unnecessarily mean that all the openings have to be protected.

The other issue may be in relation to any funny quirks located inthe IMC. Ask the inspector for the applicable code section.


   

Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  hperkins

Posts: 0

5/17/2007 10:49:00 AM

Here is my question how is the wall constructed and this is a bearing wall correct? if it is made of metal studs and sheet rock you now have a penetration through the "rating", IE the fire could get inside the wall and then it wouldn''t be 3 hr structurally rated, and I would require a fire damper. If it is a concrete wall then it is a solid assembly and the "rating" is not being penetrated I would treat it like a window or door and 704.8 would prevail.


   

Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  TJacobs

Posts: 0

5/18/2007 9:56:00 PM

704.14: Unless the exterior walls are required to have protected openings by Table 704.8, no damper is required.


   

Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  Builder bob

Posts: 0

5/25/2007 11:55:00 AM

The only other applicable part of the code in reference to this would be the requirements of IBC 714. (2003 ed.)


   

Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  peach!!

Posts: 0

5/25/2007 12:38:00 PM

ummmm you need to be in chapter 6 first, I do believe


   

Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  Builder bob

Posts: 0

5/25/2007 12:44:00 PM

Peach....Read 714...it refers you back to Chapter 6 for how it applies.....

This section (714.5) should be referenced off of IBC T. 601 and 602. You may want to pencil it in for future reference.


   

Re: Fire Damper in HVAC ducts of exterior wall of Type 1-A Construction By  peach!!

Posts: 0

5/25/2007 1:00:00 PM

Wow... I''d start in Chap 6, anyway.. up to chap 6 is basics, imho


   

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