Do I need to use fire rated drywall on the inside of this chase?

[Squints2See]

Hi folks,
I recently tore out a wood burning manufactured fireplace in a multi-story condo building. It was a corner unit and my plan is to just close up the wall behind where it was so the room is rectangular again. Once I ripped out the drywall that was behind the unit I opened up access to a huge chase where the flue pipe for my unit plus an additional flue pipe for a unit on a floor below me is. I am wanting to be sure that I seal it up correctly and safe. I have not been able to find any codes on the ICC website in the IBC or the mechanical building code book stating that I need to use type x drywall, double layers, etc... The flue pipe had a tag right on it stating to keep combustible materials at least 1" away. The chase wall had several layers of drywall (one of them 1" thick which I have never seen) originally. I don't know why.

I've attached some pics.

Does anyone know for sure or have any ideas if I need to do a layer of fire rated drywall on the chase side, with fire rated drywall on the room side as well? Or can I just insulate and use standard drywall on the inside and call it a day?

Any help would be appreciated. Also, the location is in WV and in a very rural area where there are no local inspections done and to my knowledge no amendments/county specific codes. They just follow the IBC/IRC, etc...

Thanks,
Todd

 

[snobuilder]

That 1" drywall is type X Shaftliner and is rated for 120 minutes. It is important that it gets replaced as found.

 

[Squints2See]

That 1" drywall is type X Shaftliner and is rated for 120 minutes. It is important that it gets replaced as found.

Snobuilder, thanks for the response. I assume I would be fine to use two layers of 5/8" type X then in its place? I'm not going to be able to get shaftliner up four flights of stairs very easily nor can I get it in time as I am going up there this weekend to continue work on it. Is this required by code to your knowledge? Thanks

 

[begreen]

Go to the local building department and ask the inspecting authority what is required. If there is no fireplace or flue there the code may be more lenient.

 

[snobuilder]

Unfortunately for you, you opened up a common wall that served more than your unit which increases the liability beyond your dwelling.

Assuming you will be closing it up on your own, then yes , steel studs and 2 layers of 5/8" firecode drywall at a minimum to protect your unit as well as any others abutting that chase.