I have been trying to determine the number of exits (egress points) needed in a room based on size and occupancy. I read through 101 but it didn't get me to what I needed.
So NFPA 101 should get you there. You need to know the type of occupancy and use of the space to determine the occupant load of the space. You have to apply the appropriate occupant load factor to the square footage of the space to determine the occupant load capacity. In most cases occupant loads <50 requirement a single means of egress(MOE), >50 (you're into assembly use size spaces) needs a second and remotely located means of egress, jump up to >499 and you need a third MOE and over not less than 4 MOE.
Start in NFPA 101 section 7.3 and then 7.4. But check to see there are not special allowances in the actual occupancy chapter, the number of means of egress are in the Chapter number starting at .2.4. So for example, looking for this in a "New Assembly" occupancy (Chapter 12) would send you to 12.2.4 which sends you back to 7.4. In another example, an "Existing Apartment" occupancy would be in 31.2.4 and has numerous subsections specific to that occupancy type.
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