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Fire Blocking at flush baseboard trim

rentastic

Registered User
Joined
Feb 16, 2017
Messages
4
Location
San Francisco
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
 
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.
 
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
Base Wall Stop.PNG
 
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