Occupancy
A-1 — Motion Picture Theaters, Symphony/Concert Halls, TV/Radio Studios w/ Audience, Theaters (fixed seating, performing arts)
A-2 — Restaurants, Cafeterias, Bars, Taverns, Banquet Halls, Casinos, Nightclubs (food/drink consumption)
A-3 — Worship, Libraries, Museums, Art Galleries, Courtrooms, Community Halls, Dance Halls, Exhibition Halls, Bowling, Funeral Parlors, Gyms, Lecture Halls, Amusement Arcades, Pool Halls
A-4 — Arenas, Skating Rinks, Swimming Pools, Tennis Courts (indoor sporting w/ spectator seating)
A-5 — Stadiums, Bleachers, Grandstands, Amusement Park Structures (outdoor)
B — Offices, Banks, Ambulatory Care, Animal Hospitals/Kennels, Beauty/Barber, Car Wash, Civic Admin, Outpatient Clinics, Dry Cleaning, Educational >12th Grade, Labs, Motor Vehicle Showrooms, Post Offices, Print Shops, Professional Services, Radio/TV Stations, Training/Skill Development
E — Schools K through 12th Grade (6+ persons), Day Care >5 children older than 2½ yrs (<24 hrs/day)
F-1 Moderate Hazard — Aircraft Mfg, Appliances, Automobiles, Bakeries, Beverages >16%, Clothing, Electronics, Engines, Furniture, Laundries, Leather, Machinery, Metals, Millwork, Plastics, Printing, Shoes, Textiles, Upholstering, Woodworking
F-2 Low Hazard — Beverages ≤16% Alcohol, Brick/Masonry, Ceramics, Foundries, Glass, Gypsum, Ice, Metal Products (fab/assembly)
H-1 — Detonation Hazard (Detonable pyrophorics, Explosives Div 1.1-1.6, Class 4 oxidizers, Class 4 unstable reactive)
H-2 — Deflagration / Accelerated Burning (Combustible dust, Cryogenic flammable, Flammable gas, Class I organic peroxide, Pyrophorics nondetonable)
H-3 — Physical Hazard (Flammable/combustible liquids in closed systems, Combustible fiber, Consumer fireworks, Flammable solids, Oxidizing gases, Class 2 water-reactive)
H-4 — Health Hazard (Corrosives, Highly toxic, Radioactive, Toxic materials)
H-5 — HPM Semiconductor Fabrication Facilities (§415.11)
I-1 — >16 persons, 24-hr supervised, custodial care, capable of slow evacuation: Alcohol/Drug Treatment, Boarding Houses, Group Homes, Halfway Houses, Residential Board/Care, Social Rehab
I-2 — 24-hr medical care, >5 persons, evacuation impractical: Assisted Living, Detoxification, Hospitals, Nursing Homes, Psychiatric Hospitals
I-3 — >5 persons under restraint/security, evacuation impractical: Correctional Centers, Detention Centers, Jails, Prerelease Centers, Prisons, Reformatories
I-4 — >5 persons any age, custodial care <24 hrs/day, not by parents/guardians/relatives, not in home: Adult Day Care, Child Day Care
M — Department Stores, Drug Stores, Markets, Greenhouses (display/sale w/ public access), Motor Fuel Dispensing, Retail/Wholesale Stores, Sales Rooms
R-1 — Hotels, Motels, Vacation Timeshare (transient occupants)
R-2 — Apartment Houses, Convents, Dormitories, Fraternities/Sororities, Monasteries, Live/Work Units, Rooming Houses >5 occupants (permanent occupants, >2 dwelling units)
R-3 — 1&2 Family >3 Stories or Outside IRC Scope, Buildings ≤2 DU, Care/Boarding/Rooming/Group Homes ≤5 persons, Alcohol/Drug Treatment ≤5
R-4 — 5–16 persons, 24-hr supervised, custodial care, capable of slow evacuation: Alcohol/Drug Treatment, Boarding Houses, Group Homes, Halfway Houses, Residential Board/Care, Social Rehab (construction per R-3)
R-5 — Detached 1&2 Family ≤3 Stories, Townhouses ≤3 Stories (IRC scope, separate egress), Care ≤5, Group Homes ≤5, Rooming ≤5, Cooperative Sober Living ≤10
S-1 Moderate Hazard — Aerosols Lvl 2-3, Aircraft Hangars, Furniture, Lumber, Tires, Paper/Books, Clothing, Leather, Dry Boat Storage, Motor Vehicle Repair, Self-Service Storage, Upholstery/Mattresses
S-2 Low Hazard — Public Parking Garages, Metal Parts/Cabinets/Desks, Glass, Empty Cans, Food in Noncombustible Containers, Frozen Foods, Dairy, Fresh Fruits/Vegetables, Gypsum Board, Electrical Motors/Coils
U — Agricultural Buildings, Barns, Carports, Fences >7', Grain Silos, Greenhouses, Livestock Shelters, Private Garages, Retaining Walls, Sheds, Stables, Tanks, Towers, Communication Equip <1500 SF