I have an area which requires .60 over 2,000 sq. ft.. In the area requiring .60, there are only 11 heads in the room and I am calcing 7 heads on the grid line (1 grid line supply the room) at 115 sq. ft. per head. In order to calc 2,000 sq. ft. I am having to extend my calc into an area which requires only .425 over 2,000 sq. ft. (and 135 sq. ft. per head). I am using Tyco EC-25 through out. In the Higher density Calculation, can I apply the specific head requirements from the lesser density calc area? (.425 over 135 sq. ft.) into my calculation? The 2 areas are separated by 1 hour rated walls. Any insight would be appreciated. I believe I had done it before with light hazard and ordinary hazard occupancies. I thought I had read and interpreted that scenario back in 2013, Did I read and interpret wrongly? And I cant remember the code section (If it exists). Thanks for any Input,George Medina Jr.
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