SECTION 903
AUTOMATIC SPRINKLER SYSTEMS
903.1 General. Automatic sprinkler systems shall comply with this section.
903.1.1 Alternative protection. Alternative automatic fire-extinguishing systems complying with Section 904 shall be permitted in lieu of automatic sprinkler protection where recognized by the applicable standard and approved by the building code official.
903.2 Where required. Approved automatic sprinkler systems in new buildings and structures shall be provided in the locations described in Sections 903.2.1 through 903.2.12. When automatic fire sprinkler systems are required or installed in any part of a building or structure, the entire building or structure must be provided with an automatic fire sprinkler system. Fire walls, fire partitions, and fire barriers are not allowed to be utilized to separate a building or structure into fire areas that would allow a building or structure to be partially sprinklered.
903.2.1 Group A. An automatic sprinkler system shall be provided throughout buildings and portions thereof used as Group A occupancies as provided in this section. Any building over two stories in height or 5,000 square feet in total area containing a Group A occupancy must be sprinklered throughout and must also comply with the applicable provisions of Subsections 903.2.1.1 through 903.2.1.5.
903.2.1.1 Group A-1. An automatic sprinkler system shall be provided throughout buildings containing Group A-1 occupancies where one of the following conditions exists:
1. | The Group A-1 occupancy has an occupant load of 300 or more; |
2. | The Group A-1 is located on a floor other than the level of exit discharge; |
3. | The building contains a multitheater complex. |
903.2.1.2 Group A-2. An automatic sprinkler system shall be provided throughout buildings containing Group A-2 occupancies where one of the following conditions exists:
1. | The Group A-2 occupancy has an occupant load of 100 or more; |
2. | The Group A-2 occupancy is located on a floor other than the level of exit discharge. |
903.2.1.3 Group A-3. An automatic sprinkler system shall be provided throughout buildings containing Group A-3 occupancies where one of the following conditions exists:
1. | The Group A-3 occupancy has an occupant load of 300 or more; |
2. | The Group A-3 occupancy is located on a floor other than the level of exit discharge. |
903.2.1.4 Group A-4. An automatic sprinkler system shall be provided throughout buildings containing Group A-4 occupancies where one of the following conditions exists:
1. | The Group A-4 area has an occupant load of 300 or more; |
2. | The Group A-4 area is located on a floor other than the level of exit discharge. |
903.2.1.5 Group A-5. An automatic sprinkler system shall be provided throughout buildings containing Group A-5 occupancies when the aggregate area of concession stands, retail areas, press boxes and other accessory areas exceed 1000 square feet in area.
903.2.1.2 Group B. An automatic sprinkler system shall be installed throughout buildings and portions thereof used as Group B occupancies as provided in this section. Any building over two stories in height or 5,000 square feet in total area containing a Group B occupancy must be sprinklered throughout and must also comply with Subsection 903.2.1.2.
903.2.2.1 Ambulatory health care facilities. An automatic sprinkler system shall be installed throughout all buildings containing an ambulatory health care facility occupancy when any of the following conditions exists at any time:
1. | Four or more patients are incapable of self-preservation. |
2. | One or more care recipients who are incapable of self-preservation are located at other than the level of exit discharge serving such an occupancy. |
3. | The building contains rooms or areas with special hazards such as laboratories, vocational shops and other areas where hazardous materials in exempt amounts are used or stored. |
903.2.3 Group E. An automatic sprinkler system shall be installed throughout buildings and portions thereof used as Group E occupancies as provided in this section. Any building over two stories in height or 5,000 square feet in total area containing a Group E occupancy must be sprinklered throughout and must also comply with Subsection 903.2.3.1.
903.2.3.1 Special Group E requirements. An automatic sprinklers system shall be provided throughout Group E occupancies when one or more of the following exists:
1. | Portions of the building are below the lowest level of exit discharge. |
2. | The building contains room or areas with special hazards such as laboratories, vocational shops and other areas where hazardous materials in exempt amounts are used or stored. |
903.2.4 Group F-1. An automatic sprinkler system shall be installed throughout buildings and portions thereof used as Group F-1 occupancies as provided in this section. Any building over two stories in height or 5,000 square feet in total area containing a Group F-1 occupancy must be sprinklered throughout and must also comply with Subsection 904.2.4.1.
903.2.4.1 Woodworking operations. An automatic sprinkler system shall be provided throughout any building containing woodworking operations in excess of 2,500 square feet in area which generate finely divided combustible waste or use finely divided combustible materials.
(Sections 903.2.5 through 903.2.6.2 remain unchanged.)
903.2.7 Group M. An automatic sprinkler system shall be installed throughout buildings and portions thereof used as Group M occupancies as provided in this section. Any building over two stories in height or 5,000 square feet in total area containing a Group M occupancy must be sprinklered throughout. In addition, any building of any height or area containing a Group M occupancy that is used for the display and sale of upholstered furniture must be sprinklered throughout.
903.2.7.1 High-piled storage. An automatic sprinkler system shall be provided in accordance with the California Fire Code in all buildings of Group M occupancy where storage of merchandise is in high-piled or rack storage arrays.
903.2.8 Group R and Group U. An automatic sprinkler system installed in accordance with Section 903.3 shall be provided throughout all buildings containing a Group R occupancy. An automatic sprinkler system installed in accordance with Section 903.3 shall be provided throughout a Group U occupancy attached to a Group R occupancy or within ten feet of a Group R occupancy.
(Exceptions to Section 903.2.8 remain unchanged.)
903.2.9 Group S-1. An automatic sprinkler system shall be provided throughout buildings and portions thereof used as Group S-1 occupancies as provided in this section. Any building over two stories in height or 5,000 square feet in total area containing a Group S-1 occupancy must be sprinklered throughout.
903.2.9.1 Repair Garages. An automatic sprinkler system shall be provided throughout all buildings used as repair garages in accordance with Section 406 when the repair garage is in a basement.
903.2.10 Group S-2. An automatic sprinkler system shall be provided throughout buildings and portions thereof used as Group S-2 occupancies as provided in this section. Any building over two stories in height or 5,000 square feet in total area containing a Group S-2 occupancy must be sprinklered throughout.
903.2.10.1 Group S-2 enclosed parking garages. An automatic sprinkler system shall be provided throughout buildings containing an enclosed parking garage in accordance with Section 406.4 when the enclosed parking garage is located beneath other groups.
(Sections 903.2.11 through 903.3.8 remain unchanged.)
903.4 Sprinkler system supervision and alarms. All valves controlling the water supply for automatic sprinkler systems, pumps, tanks, water levels and temperatures, critical air pressures and water flow switches on all sprinkler systems shall be electronically supervised by a listed fire alarm control unit.
Exceptions:
1. | Automatic sprinkler systems protecting one- and two-family dwellings. |
2. | Limited area systems serving fewer than 20 sprinklers. |
3. | Jockey pump control valves that are sealed or locked in the open position. |
4. | Valves controlling the fuel supply to fire pump engines that are sealed or locked in the open position. |
5. | Trim valves to pressure switches in dry, preaction and deluge sprinkler systems that are sealed or locked in the open position. |
(Sections 903.4.1 through 903.5 remain unchanged.)
903.6 Additions, alterations or repairs. An automatic sprinkler system shall be installed throughout a building when:
1. | Additions, alterations or repairs are done to a Group R occupancy if the additions, alterations or repairs have a valuation of 50% or more of the building's valuation prior to the additions, alterations or repairs. |
2. | Additions, alterations or repairs are done to other than a Group R or Group U occupancy if the building would be required to be sprinklered after the additions, alterations or repairs are completed and the additions, alterations or repairs have a valuation of 50% or more of the building's valuation prior to the additions, alterations or repairs. |
3. | Additions are made to a building equipped with an automatic sprinkler system whether or not the building was required to have a sprinkler system. |
4. | When an addition is 33% or more of the existing building area as defined in Section 202, and greater than 1,000 square feet within a two-year period. |
5. | When an existing Group R occupancy is being substantially renovated, and where the scope of the renovation is such that the Building Official determines that the complexity of installing a sprinkler system would be similar as in a new building. |
For the purposes of this section, firewalls, fire barriers or fire partitions shall not define separate buildings.
The cumulative value of additions, alterations, and repairs done within any three-year period is the valuation used to determine the 50% threshold compliance with this section. The valuation used for the existing building and for the additions, alterations and repairs is the valuation established in the City's resolution for computation of building permit fees.
(Ord. 1536 § 1, 2010; Ord. 1581 § 1, 2013; Ord. 1620 § 1, 2016; Ord. 1641 § 1, 2019; Ord. 1681, § 1, 2023; Ord. 1725, 12/18/2025)