ADOPTS WITH AMENDMENTS:

International Building Code 2018 (IBC 2018)

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[P] 2901.1 Scope

AMENDMENT
This section has been amended at the state or city level.

The provisions of this chapter and the Uniform Plumbing Code shall govern the design, construction, erection and installation of plumbing components, appliances, equipment and systems used in buildings and structures covered by this code. Toilet and bathing rooms shall be constructed in accordance with Section 1209. The International Fire Code, the International Property Maintenance Code and the Uniform Plumbing Code shall govern the use and maintenance of plumbing components, appliances, equipment and systems. The International Existing Building Code and the Uniform Plumbing Code shall govern the alteration, repair, relocation, replacement and addition of plumbing components, appliances, equipment and systems.

[P] 2902.1 Minimum Number of Fixtures

AMENDMENT
This section has been amended at the state or city level.
Plumbing fixtures shall be provided as established in ARM 24.301.351.
Table 2902.1
MINIMUM NUMBER OF PLUMBING FACILITIESa, n, q
Fixtures (Number of fixtures per number of occupants)
Occupancy or Use Water Closets
(Urinals - see footnotes g & m)
Lavatories Bathtubs/
Showers
Drinking
Fountainsr
Male Female
ASSEMBLY Theaters 1 per 125 1 per 65 1 per 2 water
closets
1 per 1,000
Nightclubsg,n,p 1 per 40 1 per 40
Restaurantsg,n,p 1 per 75 1 per 75
Halls, museums, coliseums,
arenaso, stadiums, pools, etc.
1 per 125 1 per 75 1 per 1,000
Churchesd 1 per 150 1 per 75 1 per 1,000
Businessi,j,l,p 1 per 25 1 per 25
Educational Elementary 1 per 100 1 per 35 1 per 2 water
closets
1 per floor
Educational Secondary 1 per 100 1 per 45 1 per 2 water
closets
1 per floor
Factory and industrial 1 per 100 1 per 100 1 per 100 1 per 400
High Hazard 1 per 100 1 per 100 1 per 100 1 per 1,000
INSTITUTIONAL Residential care 1 per 100 1 per 10 1 per 10 1 per 8
Hospitals, ambulatory nursing
home patientsc
1 per room 1 per roome 1 per 15 1 per 100
Day nurseriesk, sanitariums,
nonambulatory nursing home patients, etc.c
1 per 15 1 per 15 1 per 15 1 per 15r 1 per 100
Employees, other than residential carec 1 per 25 1 per 25 1 per 35 1 per 100
Visitors, other than residential care 1 per 75 1 per 75 1 per 100 1 per 500
Prisonsc 1 per cell 1 per cell 1 per 15 1 per 100
Asylums, reformatories, etc.c 1 per 15 1 per 15 1 per 15 1 per 15 1 per 100
Mercantilel 1 per 500 1 per 500 1 per 750
RESIDENTIAL Hotels, motels 1 per guestroom 1 per guestroom 1 per guestroom
Lodges 1 per 10 1 per 10 1 per 10 1 per 8
Multiple family 1 per dwelling unit 1 per dwelling
unit
1 per dwelling
unit
Dormitories 1 per 10 1 per 10 1 per 10 1 per 8 1 per 100
One and two-family dwellinga 1 per dwelling unit 1 per dwelling
unit
1 per dwelling
unit
  1. The fixtures shown are based on one fixture being the minimum required for the number of persons indicated or any fraction of the number of persons indicated. The number of occupants shall be determined by the building code.
  2. Fixtures located in adjacent buildings under the ownership or control of the church shall be made available during periods the church is occupied.
  3. Toilet facilities for employees shall be separate from facilities of inmates or patients.
  4. For attached one- and two-family dwellings, one automatic clothes washer connection shall be required per 20 dwelling units.
  5. A single-occupant toilet room with one water closet and one lavatory serving not more than two adjacent patient rooms shall be permitted where such room is provided with direct access from each patient room and with provisions for privacy.
  6. For day nurseries, a maximum of one bathtub shall be required.
  7. Food service establishments or any establishment that sells alcoholic beverages for on-site consumption requires at least one urinal.
  8. Contact the Department of Public Health and Human Services for additional requirements for food service establishments.
  9. At the discretion of the building official, certain nonassembly buildings where food and beverages are not consumed on the premises, may be allowed to furnish only one public toilet provided it is designed for male and female use and it is suitable for use by handicapped persons.
  10. At the discretion of the building official, for small (less than 1200 sq. ft. in floor area) convenience stores (typically gasoline sales plus convenience items and beverages) located to serve primarily neighborhood areas instead of major highways, only one public toilet is needed, provided it is designated for both male and female use and it is suitable for use by handicapped persons.
  11. If the total number of students plus staff exceeds 20, must provide separate male and female toilets.
  12. Keyed toilets under employee control of the type available at service stations are permitted.
  13. Where urinals are provided, notwithstanding the required urinal in footnote g. above, one water closet less than the number specified may be provided for each urinal installed, except the number of water closets in such cases shall not be reduced to less than one-half of the minimum specified.
  14. When calculating number of male and female occupants, the occupant load of the building shall be considered half male and half female, and the occupant load shall be calculated in accordance with the building code.
  15. Riding arenas as defined in ARM 24.301.146(11) are required to provide separate male and female accessible restrooms which contain a minimum of one water closet and one lavatory.
  16. See ARM 24.301.903 for additional requirements and provisions concerning building accessibility.
  17. If a specific occupancy is not shown in the table, the building official shall determine on an individual case-by-case basis the requirements for that occupancy.
  18. On an individual case-by-case basis the building official may approve an alternative source of potable drinking water, such as, but not limited to, a bottled water cooler, in lieu of a drinking fountain.
UpCodes note: This modifications to the International Building Code according to Rule 24.301.146 is, "applicable to both the department's building code enforcement program and local government building code enforcement programs".

To determine the occupant load of each sex, the total occupant load shall be divided in half. To determine the required number of fixtures, the fixture ratio or ratios for each fixture type shall be applied to the occupant load of each sex in accordance with Table 2902.1. Fractional numbers resulting from applying the fixture ratios of Table 2902.1 shall be rounded up to the next whole number. For calculations involving multiple occupancies, such fractional numbers for each occupancy shall first be summed and then rounded up to the next whole number.

Exception: The total occupant load shall not be required to be divided in half where approved statistical data indicate a distribution of the sexes of other than 50 percent of each sex.

The plumbing fixtures located in single-user toilet facilities and bathing rooms, including family or assisted-use toilet and bathing rooms that are required by Section 1109.2, shall contribute toward the total number of required plumbing fixtures for a building or tenant space. Single-user toilet facilities and bathing rooms, and family or assisted-use toilet rooms and bathing rooms shall be identified for use by either sex.
Where two or more toilet rooms are provided for each sex, the required number of lavatories shall be distributed proportionately to the required number of water closets.

Where plumbing fixtures are required, separate facilities shall be provided for each sex.

Exceptions:

  1. Separate facilities shall not be required for dwelling units and sleeping units.
  2. Separate facilities shall not be required in structures or tenant spaces with a total occupant load, including both employees and customers, of 15 or fewer.
  3. Separate facilities shall not be required in mercantile occupancies in which the maximum occupant load is 100 or fewer.
  4. Separate facilities shall not be required in business occupancies in which the maximum occupant load is 25 or fewer.
Where a building or tenant space requires a separate toilet facility for each sex and each toilet facility is required to have only one water closet, two family or assisted-use toilet facilities shall be permitted to serve as the required separate facilities. Family or assisted-use toilet facilities shall not be required to be identified for exclusive use by either sex as required by Section 2902.4.

[P] 2902.3 Employee and Public Toilet Facilities

AMENDMENT
This section has been amended at the state or city level.

[P] 2902.3.1 Access

AMENDMENT
This section has been amended at the state or city level.

[P] 2902.3.2 Prohibited Toilet Room Location

AMENDMENT
This section has been amended at the state or city level.

[P] 2902.3.3 Location of Toilet Facilities in Occupancies Other Than Malls

AMENDMENT
This section has been amended at the state or city level.

[P] 2902.3.4 Location of Toilet Facilities in Malls

AMENDMENT
This section has been amended at the state or city level.

[P] 2902.3.5 Pay Facilities

AMENDMENT
This section has been amended at the state or city level.

[P] 2902.3.6 Door Locking

AMENDMENT
This section has been amended at the state or city level.
Required public facilities shall be provided with signs that designate the sex as required by Section 2902.2. Signs shall be readily visible and located near the entrance to each toilet facility. Signs for accessible toilet facilities shall comply with Section 1111.
Directional signage indicating the route to the required public toilet facilities shall be posted in a lobby, corridor, aisle or similar space, such that the sign can be readily seen from the main entrance to the building or tenant space.
Drinking fountains shall not be required to be located in individual tenant spaces provided that public drinking fountains are located within a distance of travel of 500 feet (152 m) of the most remote location in the tenant space and not more than one story above or below the tenant space. Where the tenant space is in a covered or open mall, such distance shall not exceed 300 feet (91 440 mm). Drinking fountains shall be located on an accessible route.
Drinking fountains shall not be required for an occupant load of 15 or fewer.
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