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310.3 Residential Group R-1.
Residential Group R-1 occupancies shall include:
   1.   Residential buildings or spaces occupied, as a rule, transiently, for a period less than 30 days, as the more or less temporary abode of individuals or families who are lodged with or without meals, including, but not limited to, the following:
      Class B multiple dwellings as defined in Section 27-2004 of the New York City Housing Maintenance Code and Section 4 of the New York State Multiple Dwelling Law, where not classified in Group I-1.
      Club houses
      Hotels (transient)
      Motels (transient)
      Rooming houses (boarding houses – transient)
      Settlement houses
      Vacation timeshares
   2.   College or school student dormitories, except for student apartments classified as an R-2 occupancy
   3.   Congregate living units owned and operated by a government agency or not-for-profit organization, where the number of occupants in the dwelling unit exceeds the limitations of a family as defined, including, but not limited to, the following:
      Adult homes or enriched housing with 16 or fewer occupants requiring supervised care within the same building on a 24-hour basis
      Fraternity and sorority houses
      Homeless shelters
(Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023)
Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.
310.4 Residential Group R-2.
Residential Group R-2 occupancies shall include buildings or portions thereof containing sleeping units or more than two dwelling units that are occupied for permanent residence purposes as defined in subparagraph (a) of paragraph 8 of subdivision a of Section 27-2004 of the New York City Housing Maintenance Code. Such occupancy shall be subject to the New York State Multiple Dwelling Law. This group shall include, but not be limited to, the following:
   Adult homes or enriched housing with 16 or fewer occupants requiring supervised care on a 24-hour basis in the same building, provided that the number of occupants per dwelling unit does not exceed the definition of a family
   Apartment houses
   Apartment hotels (nontransient)
   Class A multiple dwellings as defined in Section 27-2004 of the New York City Housing Maintenance Code and Section 4 of the New York State Multiple Dwelling Law, where not classified in Group I, including the following:
      1.   Dwelling units where the resident of the unit provides custodial care to no more than four persons on less than a 24-hour basis and not overnight, where not classified in Group I.
      2.   Dwelling units where the resident of the unit provides child custodial care as a family day care home registered with the New York City Department of Health and Mental Hygiene in accordance with the New York State Social Services Law, with no more than six children between the ages of 2 and 13, or with no more than five children if any are under the age of 2, receiving supervised care on less than a 24-hour basis and not overnight, where not classified in Group I.
   Convents and monasteries with more than 20 occupants in the building
   Student apartments
(Am. L.L. 2023/077, 6/11/2023, eff. 6/11/2023)
Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2023/077.
310.5 Residential Group R-3.
Residential Group R-3 occupancies shall include buildings or portions thereof containing no more than 2 dwelling units, occupied, as a rule, for shelter and sleeping accommodation on a long-term basis for a month or more at a time, and are not classified in Group R-1, R-2 or I. This group shall include, but not be limited to, the following:
   Convents and monasteries with 20 or fewer occupants in the building
   Group homes
   One- and two-family dwellings, including the following:
      1.   Dwelling units where the resident of the unit provides custodial care to no more than four persons on less than a 24-hour basis and not overnight.
      2.   Dwelling units where the resident of the unit provides child custodial care as a family day care home registered with the New York City Department of Health and Mental Hygiene in accordance with the New York State Social Services Law for three to six children for more than three hours per day per child but less than 24 hours per day. A family day care provider may, however, care for seven or eight children at any one time if no more than six of the children are less than school age and such children receive services only during the periods set forth in the New York State Social Services Law.
      3.   Dwelling units where the resident of the unit provides child custodial care as a group family day care home registered with the New York City Department of Health and Mental Hygiene in accordance with the New York State Social Services Law for seven to 12 children of all ages for more than three hours a day per child but less than 24 hours per day. There may be an additional four children if such children are of school age and such children receive services only during the periods set forth in the New York State Social Services Law.
Section BC 311: Storage Group S
311.1 Storage Group S.
Storage Group S occupancy includes, among others, the use of a building or structure, or a portion thereof, for storage, such as for warehouses, storage rooms, freight depots and distribution centers, when not classified as a hazardous occupancy.
311.1.1 Accessory storage spaces.
A room or space used for storage purposes that is less than 100 square feet (9.3 m 2 ) in area and accessory to another occupancy shall be classified as part of that occupancy. The aggregate area of such rooms or spaces shall not exceed the allowable area limits of Section 508.2.3.
311.2 Moderate-hazard storage, Group S-1.
Storage Group S-1 occupancies are buildings occupied for storing any flammable or combustible materials that are likely to permit the development and production of fire with moderate rapidity including, but not limited to, storage of the following:
   Aerosols, Levels 2 and 3
   Aircraft hangar (storage and repair)
   Bags; cloth, burlap and paper
   Bamboos and rattan
   Baskets
   Belting; canvas and leather
   Books and paper in rolls or packs
   Boots and shoes
   Buttons, including cloth covered, pearl or bone
   Cardboard and cardboard boxes
   Clothing, woolen wearing apparel
   Cordage
   Dry boat storage (indoor, not accessory to Group R)
   Furniture
   Furs
   Glues, mucilage, pastes and size
   Grains
   Horns and combs, other than celluloid
   Leather
   Linoleum
   Lumber
   Photo engravings
   Resilient flooring
   Silks
   Soaps
   Sugar
   Tires, bulk storage of
   Tobacco, cigars, cigarettes and snuff
   Upholstery and mattresses
   Wax candles
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