I have a concrete slab that is separating two spaces. The fire resistance needed is 2 hours between spaces. The existing conditions have many penetrations from our mezzanine space to the tenant above.
Some penetrations go through to the space above and in some instances the space is larger than 6 inch. diameter. The GC does not want to firestop every penetration due to costs and suggested we could do a drop ceiling.
I am correct in my understanding that even if I install a UL listed 2 hour rated assembly system for a suspended ceiling, I would still need to close gaps from the existing pipe penetrations since at these locations it is not a 2 hour rated assembly since the assembly includes the deck/slab?
Some penetrations go through to the space above and in some instances the space is larger than 6 inch. diameter. The GC does not want to firestop every penetration due to costs and suggested we could do a drop ceiling.
I am correct in my understanding that even if I install a UL listed 2 hour rated assembly system for a suspended ceiling, I would still need to close gaps from the existing pipe penetrations since at these locations it is not a 2 hour rated assembly since the assembly includes the deck/slab?