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Fire Rated Ceiling Assembly

D

Dominic

SAWHORSE
Joined
Jun 20, 2017
Messages
51
Location
Albany
I am currently working on an existing building that has a fire rated floor and ceiling assembly that allows for the finish ceiling to be 20 1/2" below the top of joist (see image). The mechanical engineer is trying to fit in an energy recover unit and needs more space. The room has 9' ceilings so it can easily be lowered. Lowering the ceiling will not meet the UL assembly. What options do I have?

1632345277793.png
 
Could you raise the rated ceiling and install the ERV in a soffit? I would not install the ERV in the concealed space, as you would need an access hatch to service/repair/replace the unit. Getting a rated access hatch would be difficult at best.
 
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