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.
|Occupancy or Use||Water Closets
(Urinals - see footnotes g & m)
|ASSEMBLY||Theaters||1 per 125||1 per 65||1 per 2 water
|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
|1 per floor|
|Educational Secondary||1 per 100||1 per 45||1 per 2 water
|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
|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
|1 per dwelling
|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
|1 per dwelling
- 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.
- Fixtures located in adjacent buildings under the ownership or control of the church shall be made available during periods the church is occupied.
- Toilet facilities for employees shall be separate from facilities of inmates or patients.
- For attached one- and two-family dwellings, one automatic clothes washer connection shall be required per 20 dwelling units.
- 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.
- For day nurseries, a maximum of one bathtub shall be required.
- Food service establishments or any establishment that sells alcoholic beverages for on-site consumption requires at least one urinal.
- Contact the Department of Public Health and Human Services for additional requirements for food service establishments.
- 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.
- 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.
- If the total number of students plus staff exceeds 20, must provide separate male and female toilets.
- Keyed toilets under employee control of the type available at service stations are permitted.
- 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.
- 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.
- 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.
- See ARM 24.301.903 for additional requirements and provisions concerning building accessibility.
- 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.
- 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.
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.
Where plumbing fixtures are required, separate facilities shall be provided for each sex.
- Separate facilities shall not be required for dwelling units and sleeping units.
- 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.
- Separate facilities shall not be required in mercantile occupancies in which the maximum occupant load is 100 or fewer.
- Separate facilities shall not be required in business occupancies in which the maximum occupant load is 25 or fewer.