Fire Blocking at flush baseboard trim

[rentastic]

Hello - We're working on a modern design 4-unit R-2 building. We'd like to do a flush baseboard trim or 'museum' 3/4" z-mold trim at the base. With these two trim types, we're unable to extend our fire-rated gyp. bd. down to the floor, thus breaking our fire stop. Has anyone dealt with this type of detail before in a fire-rated wall, and if so how did they accomplish the fire-rating? Does a fire-rated z-mold exist? We might have to default to an applied baseboard, but we'd like to do something crisper if possible. Any insight would be great!

Thanks

 

[FLSTF01]

As this is a four-family, it is commercial, not residential.

That being said, the answer will depend on the fire rating required and the ratings of different materials available. On the surface, I am not crazy about the scenario you are proposing, but I'm old school.

 

[rentastic]

Thanks. I've posted this in the commercial section as well.

 

[steveray]

Thanks. I've posted this in the commercial section as well.

That explains my confusion....As I thought I already responded to this...

 

[Builder Bob]

Sprinkler building should allow 30 min tenant separations thus should not be a problem with calculated fire resistance in chapter 7.

 

[Bruce Ring CWW]

Light guage Z mold is available at most metal framing supply stores

 

[ADAguy]

Sounds as if you don't have sprinklers?

 

[JPohling]

2 layers of gyp

 

[Francis Vineyard]

Hello - We're working on a modern design 4-unit R-2 building. We'd like to do a flush baseboard trim or 'museum' 3/4" z-mold trim at the base. With these two trim types, we're unable to extend our fire-rated gyp. bd. down to the floor, thus breaking our fire stop. Has anyone dealt with this type of detail before in a fire-rated wall, and if so how did they accomplish the fire-rating? Does a fire-rated z-mold exist? We might have to default to an applied baseboard, but we'd like to do something crisper if possible. Any insight would be great!

Thanks

A drawing would further clarify the issue; perhaps one of these fireblock systems (BW-S-0001, 0002 or 0023) may help with the details:
https://www.hilti.com/search?text=bw-s-0001