Shaft interrupts fire partition

[pmarx]

Hopefully the sketch I attached works but just in case, any problem if a 2 HR shaft forms part of the separation between dwelling units (IBC 2015 402.2)?

 

[classicT]

Just use approved joints.

 

[steveray]

Second...And make sure it is "rating to rating" not the fluff on top of the rating....Sprinklered? So is it really a half hour rating?