Can somobody advise
In a room are installed both pendent sprinklers under opened-grid suspended ceiling and upright sprinklers above this suspended ceiling. Void height is 1,5m.
Openings constitute 50 percent of the area of the suspended ceiling material. Fire hazard - ordinary hazard
Is it required acc. to NFPA to include in calculations activation both sprinklers above and below suspended ceiling?
Thank you in advance