UFC 3-600-01
17 April 2003
with change 16 January 2004
APPENDIX B
OCCUPANCY HAZARD CLASSIFICATION for DETERMINING
AUTOMATIC SPRINKLER DENSITIES and HOSE STREAM
DEMANDS
B-1
Classification of Occupancies. The principal occupancy
classifications are light hazard, ordinary hazard, and extra hazard. Listed below
are the classifications with examples of common occupancies listed under each.
The basic hazard classification of an occupancy does not define the fire hazard
present in all areas of that occupancy. If more hazardous processes or areas
exist within a given occupancy, protect these areas in accordance with the fire
protection requirements pertaining to the hazard classification of that area.
Determine the classification for unlisted occupancies from the definitions or by
comparison with one of the listed occupancies.
B-1.1
Light Hazard Occupancies. Occupancies or portions of
occupancies where the quantity and combustibility of the contents are low and
fires with relatively low rates of heat release are expected. Small, scattered
amounts of flammable liquids in closed containers are allowable in quantities not
exceeding 20 L (5 gal) per fire area. This classification includes but is not limited
to the following occupancies:
Churches and chapels
Gymnasiums
Clinics (dental, outpatient, patient areas only)
Hospitals
Data processing areas
Mess areas
Dispensaries (patient areas only)
Drill halls (not used for storage or exhibition)
Disciplinary barracks
Offices
Child development centers
B-1.2
Ordinary Hazard Group 1 Occupancies. Occupancies or
portions of occupancies where combustibility is low, quantity of combustibles is
B-86
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