WAC 51-51-60105. Appendix U — Dwelling unit fire sprinkler systems

The design and installation of residential fire sprinkler systems shall be in accordance with the International Residential Code Section P2904 Dwelling Unit Fire Sprinkler Systems. P2904.1.1 Required sprinkler locations. Sprinklers shall be installed to protect all areas of a dwelling unit. EXCEPTIONS: 1. Uninhabitable attics, crawl spaces and normally unoccupied concealed spaces that do not contain fuel-fired appliances do not require sprinklers. In uninhabitable attics, crawl spaces and normally unoccupied concealed spaces that contain fuel-fired equipment, a sprinkler shall be installed above the equipment; however, sprinklers shall not be required in the remainder of the space. 2. Clothes closets, linen closets and pantries not exceeding 24 square feet (2.2 m 2 ) in area, with the smallest dimension not greater than 3 feet (915 mm) and having wall and ceiling surfaces of gypsum board. 3. Bathrooms not more than 55 square feet (5.1 m 2 ) in area. 4. Garages; carports; exterior porches; unheated entry areas, such as mud rooms, that are adjacent to an exterior door; and similar areas.