IBC requires a fire wall between townhomes. I seem to be finding a reference to the use of "double walls" - or two separate 1-hour walls, along with several images of this detail. Each framed wall has a layer of 5/8 gypsum on either side of the framing (four layers of gyp total, two on the exterior side, two on the gap side). My question is this - is it even possible to build? Sure you can build one of the walls and fire tape/caulk it, but the second wall - how do you install the gypsum on the interior (gap side) of the framing? I know there are other options with shaftliner panels etc. - but is 4 layers of 5/8" on both sides of two walls even possible to build correctly?
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Townhome Separation Walls
- Thread starter Noob
- Start date
mtlogcabin
SAWHORSE
Do it all the time. Frame the wall on the floor, install sheetrock, have it inspected, stand the wall, the repeat.
mtlogcabin
SAWHORSE
There are multiple products like this that is used.
www.all-wall.com
Or reference the IBC Exceptions #2 & #4 or #5
2508.5 Joint treatment.
Gypsum board and gypsum panel product fire-resistance-rated assemblies shall have joints and fasteners treated.
Exception: Joint and fastener treatment need not be provided where any of the following conditions occur:
1. Where the gypsum board or the gypsum panel product is to receive a decorative finish such as wood paneling, battens, acoustical finishes or any similar application that would be equivalent to joint treatment.
2. On single-layer systems where joints occur over wood framing members.
3. Square edge or tongue-and-groove edge gypsum board (V-edge), gypsum panel products, gypsum backing board or gypsum sheathing.
4. On multilayer systems where the joints of adjacent layers are offset.
5. Assemblies tested without joint treatment.
E-Z Tape Flame Fighter Drywall Fire Rated Joint Tape 250' Roll
DetailsE-Z Tape Flame Fighter Fire TapeIs used in place of regular drywall tape and fiberglass mesh. This version is specifically designed for firewall construction.Flame Fighter Tape has passed the full scale tests for one-hour fire rated, vertically or horizontally hung wall systems, on both...
www.all-wall.com
Or reference the IBC Exceptions #2 & #4 or #5
2508.5 Joint treatment.
Gypsum board and gypsum panel product fire-resistance-rated assemblies shall have joints and fasteners treated.
Exception: Joint and fastener treatment need not be provided where any of the following conditions occur:
1. Where the gypsum board or the gypsum panel product is to receive a decorative finish such as wood paneling, battens, acoustical finishes or any similar application that would be equivalent to joint treatment.
2. On single-layer systems where joints occur over wood framing members.
3. Square edge or tongue-and-groove edge gypsum board (V-edge), gypsum panel products, gypsum backing board or gypsum sheathing.
4. On multilayer systems where the joints of adjacent layers are offset.
5. Assemblies tested without joint treatment.
Paul Sweet
Sawhorse
How do you sheetrock the floor framing for the second unit when there is only an inch or so to work in?
mtlogcabin
SAWHORSE
