An Introduction to: Designer s Illustrated Guide to NFPA 101

3. PRESENTAION OUTLINE PURPOSE OF THE BOOK EVOLUTION OF FORMAT AND ORGANIZATION FINAL FORMAT AND ORGANIZATION

4. MULTIPLE OCCUPANCIES

5. Definition: A building or structure in which two or more classes of occupancy exist (101:3.3.152.1) The code provides that multiple occupancies be protected either as mixed occupancies or as separate occupancies. Mixed Occupancy: A multiple occupancy where the occupants are intermingled and the egress corridor system is shared between the occupancies. POINTS: To qualify as a mixed occupancy, the entire facility must comply with the most restrictive Life Safety requirements applicable to the most restrictive occupancy. Fire rated separations between the mixed occupancies are not required.

6. Separated Occupancy: A multiple occupancy where the occupancies are separated by fire resistance rated assemblies. POINTS: To qualify as a separated occupancy, the multiple occupancies must be completely separated from each other by fire resistant rated assemblies both vertically and horizontally. Each of the separated occupancies must be provided with independent means of egress. Life safety requirements are applied to each multiple occupancy per the code specific to each occupancy. Figures 2.1 and 2.2 illustrate criteria for mixed and separated multiple occupancies.

7. 2.12.1

8. 2.22.2

9. NOTE: Because health care occupancies are commonly associated with or attached to ambulatory care facilities and/or medical office buildings that provide outpatient services, the code modifies the criteria for multiple occupancies as follows: Sections of health care facilities are permitted to be classified as other occupancies provided that:

10. POINTS: Customary access means that occasional ambulatory inpatients are permitted to visit a doctor�s office in an adjacent business occupancy. Emergency egress from a health care occupancy into other occupancies is permitted because emergency egress is not considered customary access Inpatients are permitted to exit into a business occupancy only via a horizontal exit. In this instance, corridor width, corridor partitions, stairways, etc. Can comply with the life safety requirements of the business occupancy and not the life safety requirements of the health care occupancy. The business occupancy should not contain high hazard contents.