I have a multi use building in the planning stage. It will be 3 stories tall. The basement will be storage and 1 apartment unit. The first floor will be a restaurant. And the third floor will be 3 apartment units. They want to use NFPA 13 for the commercial space and 13R for the apartments. Just wondering if this can be done. Do the two systems need to be separated or can they be tied together?Just looking for some help on this.