First of all thank you for all the reply. The AHJ here only approves the fire alarm system layout and they base everything from NFPA 72. The smoke detector that im talking about is just for detection and will not control any doors nor HVAC equipment. We have a separate detectors to detect and control such equipments (systems). I'm just curious with regards to the NFPA 72 specially this
17.5.3.1.2 Detectors shall not be required in combustible
blind spaces if any of the following conditions exist:
Where there are small concealed spaces over rooms, provided
that any space in question does not exceed 50 ft?
(4.6 m?) in area.
Is this also applicable to small rooms with low probability of fire? There is a confusion in site where there are some small rooms connecting the main corridor to some rooms (comfort rooms, etc.) I've seen the approved plans by the AHJ and there are no smoke detectors in the said rooms. It consists of only (1) light fixture and (1) sprinkler head. The image below is one of the area i'm concerned. Again thank you for the time and effort.