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OCCUPANCY CLASSIFICATION AND USE

SECTION 310 310.4.2 Lodging houses. Owner-occupied lodging houses
RESIDENTIAL GROUP R with five or fewer guest rooms and 10 or fewer total occu-
310.1 Residential Group R. Residential Group R includes, pants shall be permitted to be constructed in accordance
among others, the use of a building or structure, or a portion with the International Residential Code.
thereof, for sleeping purposes when not classified as an Insti- 310.5 Residential Group R-4. Residential Group R-4 occu-
tutional Group I or when not regulated by the International pancy shall include buildings, structures or portions thereof
Residential Code. for more than five but not more than 16 persons, excluding
staff, who reside on a 24-hour basis in a supervised residen-
310.2 Residential Group R-1. Residential Group R-1 occu-
pancies containing sleeping units where the occupants are tial environment and receive custodial care. Buildings of
primarily transient in nature, including: Group R-4 shall be classified as one of the occupancy condi-
Boarding houses (transient) with more than 10 occupants tions specified in Section 310.5.1 or 310.5.2. This group shall
include, but not be limited to, the following:
Congregate living facilities (transient) with more than 10
occupants Alcohol and drug centers
Hotels (transient) Assisted living facilities
Motels (transient) Congregate care facilities
Group homes
310.3 Residential Group R-2. Residential Group R-2 occu- Halfway houses
pancies containing sleeping units or more than two dwelling Residential board and care facilities
units where the occupants are primarily permanent in nature, Social rehabilitation facilities
including:
Group R-4 occupancies shall meet the requirements for
Apartment houses construction as defined for Group R-3, except as otherwise
Congregate living facilities (nontransient) with more provided for in this code.
than 16 occupants
Boarding houses (nontransient) 310.5.1 Condition 1. This occupancy condition shall
Convents include buildings in which all persons receiving custodial
Dormitories care, without any assistance, are capable of responding to
Fraternities and sororities an emergency situation to complete building evacuation.
Monasteries 310.5.2 Condition 2. This occupancy condition shall
Hotels (nontransient) include buildings in which there are any persons receiving
Live/work units custodial care who require limited verbal or physical assis-
Motels (nontransient) tance while responding to an emergency situation to com-
Vacation timeshare properties plete building evacuation.
310.4 Residential Group R-3. Residential Group R-3 occu-
pancies where the occupants are primarily permanent in SECTION 311
nature and not classified as Group R-1, R-2, R-4 or I, includ- STORAGE GROUP S
ing:
311.1 Storage Group S. Storage Group S occupancy
Buildings that do not contain more than two dwelling units includes, among others, the use of a building or structure, or a
Care facilities that provide accommodations for five or portion thereof, for storage that is not classified as a hazard-
fewer persons receiving care ous occupancy.
Congregate living facilities (nontransient) with 16 or
fewer occupants 311.1.1 Accessory storage spaces. A room or space used
for storage purposes that is accessory to another occu-
Boarding houses (nontransient) pancy shall be classified as part of that occupancy.
Convents
Dormitories 311.2 Moderate-hazard storage, Group S-1. Storage Group
Fraternities and sororities S-1 occupancies are buildings occupied for storage uses that
Monasteries are not classified as Group S-2, including, but not limited to,
Congregate living facilities (transient) with 10 or fewer storage of the following:
occupants Aerosol products, Levels 2 and 3
Aircraft hangar (storage and repair)
Boarding houses (transient) Bags: cloth, burlap and paper
Lodging houses (transient) with five or fewer guest rooms Bamboos and rattan
and 10 or fewer occupants Baskets
310.4.1 Care facilities within a dwelling. Care facilities Belting: canvas and leather
for five or fewer persons receiving care that are within a Books and paper in rolls or packs
single-family dwelling are permitted to comply with the Boots and shoes
International Residential Code provided an automatic Buttons, including cloth covered, pearl or bone
sprinkler system is installed in accordance with Section Cardboard and cardboard boxes
903.3.1.3 or Section P2904 of the International Residen- Clothing, woolen wearing apparel
tial Code. Cordage
Dry boat storage (indoor)

2018 INTERNATIONAL BUILDING CODE ® 53
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