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Fire Code

903.1.2 Residential systems. Unless specifically allowed by this code, residential sprinkler systems installed in accordance with NFPA 13D or NFPA 13R shall not be recognized for the purposes of exceptions or reductions permitted by other requirements of adopted codes.

Section 903.2, including all subsections thereto, is deleted in its entirety and replaced with the following:

903.2 Where required. Approved automatic sprinkler systems in new buildings and structures shall be provided in the locations described in this section.

903.2.1 New buildings and structures. An approved automatic sprinkler system shall be installed throughout all areas and all levels of all new Group A, B, E, F, H, I, M, R-1, R-2, R-4, and S occupancies.

Exceptions:

  • 1. Detached gazebos and ramadas, not exceeding 1,000 square feet (93 m2), used for public use.
  • 2. Independent restroom buildings, not exceeding 400 square feet (38 m2), associated with golf courses, parks and similar uses.
  • 3. Guardhouses not exceeding 300 square feet (28 m2), used to control access to or within residential and/or commercial developments.
  • 4. Detached equipment or storage buildings, not exceeding 300 square feet (28 m2), used for commercial use and located not closer than 5 feet (1524 mm) to any building or property line.
  • 5. Detached non-combustible carports with covered parking not exceeding 15,000 square feet (1394 m2), for residential and commercial developments.
  • 6. Detached non-combustible canopies, not exceeding 1,500 square feet (139 m2), used exclusively for automotive, motor fuel-dispensing stations for private passenger vehicles.
  • 7. Temporary modular structures, not exceeding 1,000 square feet (93 m2), used exclusively for construction project offices on construction sites for a period not to exceed 1 year and located not closer than 20 feet (6096 mm) to any building or property line.
  • 8. Special use non-combustible structures as approved by the fire marshal.

903.2.2 New R-3 occupancy buildings and structures. An approved automatic sprinkler system shall be installed throughout all areas and all levels of all new R-3 occupancies in accordance with NFPA 13D and fire department policy.

903.2.3 Additions, alterations, or repairs. The provisions of this section are intended to provide a reasonable degree of safety for building additions, alterations, or repairs by requiring installation of an approved automatic sprinkler system. For purposes of the following automatic sprinkler system installation requirements, square footage and area calculations shall be calculated by adding together the total square footage and/or area affected by all building permits issued for a structure in a consecutive three-year period.

An approved automatic sprinkler system shall be installed throughout the entire structure or building, including all areas and all levels of all Group A, B, E, F, H, I, M, R, and S occupancies, when any one of the following apply:
  • 1. Building occupant load is increased without increasing square footage.
  • 2. Occupancy classification is changed to a higher hazard level, or changes occupancy within hazard level 1, per Table 903.2.3.
  • 3. Structure fire resistance rating is decreased.
  • 4. Structural changes affect the primary structural system of the existing building.
  • 5. Work affects more than fifty percent (50%) of the existing building floor area.
  • 6. Work affects more than 5,000 square feet (465 m2) of the existing building floor area.
  • 7. Building addition increases the existing building floor area by more than fifty percent (50%), or exceeds 5,000 square feet (465 m2); whichever is less.
  • 8. Fire or other casualty has damages valued in excess of fifty percent (50%) of the building’s fair market value at the time of the fire or other casualty.

Exception: Existing non-sprinklered R-3 occupancies not changing occupancy.

Table 903.2.3
 Hazard Level  Existing Building Type
1 (highest) H, I, R-1, R-2, R-4
2

A-2, A-5

3 A-1, A-3, A-4, F-1, S-1
4 B, E, M, F-2, S-2
5 R-3
6 (lowest) U

Note:
1. Occupancies as defined in this Code and the City of Avondale Building Code.

2. This Section is not intended to indicate all instances or circumstances where fire sprinkler systems are required; refer to this Code and the City of Avondale Building Code for other requirements

Section 903.3.1.1 is deleted in its entirety and replaced with the following:

903.3.1.1 NFPA 13 Sprinkler systems. Where the provisions of this code require that a building or portion thereof be equipped throughout with an automatic sprinkler system in accordance with this section, sprinklers shall be installed throughout in accordance with NFPA 13 except as provided in Section 903.3.1.1.1. Partial sprinkler systems are prohibited.

Section 903.3.1.1.2 is added to read as follows:

903.3.1.1.2 Special requirements for speculative warehouses. Speculative warehouses shall comply with this Chapter, Chapter 23, and the following. The minimum sprinkler design in speculative warehouses shall be based upon the maximum allowable storage height in the building as follows:
1. If the maximum allowable storage height can exceed 12 feet (3658 mm) but cannot exceed 22 feet (6706 mm), comply with requirements of Chapter 23 and with the following design requirements:

a. A Class IV non-encapsulated commodity, double row rack storage, 8 foot (2439 mm) wide aisles and 286 degree Fahrenheit sprinklers.

b. Hydraulically designed in accordance to protect the maximum possible clear height of storage without in-rack sprinklers.

c. Add 500 gallons per minute (1892 L) at the base of the riser allowance for inside hose to the hydraulic calculations and provide hose stub-outs for future installation or use existing columns for hose installation locations.

2. If the maximum allowable storage height exceeds 22 feet (6706 mm), comply with the requirements of Chapter 23, and with the following design requirements:

a. The system shall be hydraulically designed to protect the maximum possible clear height of storage without in-rack sprinklers and provide .64 gallons per minute (2.42 L) per square foot over the hydraulically most remote 2000 square feet (186 m2) or use an approved alternate design such as Early Suppression Fast Response (ESFR) sprinklers.

Exception: A non-speculative warehouse being built for an owner/operator with less than Class IV commodities may be designed to the expected commodity class.

Section 903.3.1.1.3 is added to read as follows:

903.3.1.1.3 Special requirements for thin wall pipe. Pipe or tube shall have a minimum Corrosion Resistant Ratio (CRR) of one or greater.

Section 903.3.1.2.2 is added to read as follows:

903.3.1.2.2 Special Requirements for Group R-1 and R-2 occupancies. In Group R-1 and R-2 occupancies, sprinklers shall be installed in bathrooms, closet areas containing any electrical or mechanical equipment, foyers, attics, attached garages, accessible areas under interior stairs or landings, exterior balconies, covered patios or landings. In living spaces, sprinklers shall be the concealed type or approved signs shall be installed prohibiting the use of sprinklers for non-fire protection purposes. For the purpose of inspection, testing, or maintenance, there shall be provided, at the time of construction, an exterior access door on the side of the building next to the fire sprinkler riser of adequate size to allow for valves and gauges to be accessed, repaired and viewed from the exterior for testing and maintenance purposes. The dimensions of the access door will be dependent upon the design of the riser and system devices but shall, in no case, require that service personnel must enter a private dwelling or garage to reach the riser for service and/or repair.

Section 903.3.1.2.3 is added to read as follows:

903.3.1.2.3 Special requirements for Group R-3 and R-4 occupancies. In R-3 and R-4 occupancies, sprinklers shall be installed in bathrooms, closet areas containing any electrical or mechanical equipment, foyers, attached garages, and accessible areas under interior stairs or landings. State licensed facilities shall be equipped with an approved automatic sprinkler system in accordance with this code. In R-4 occupancies, sprinklers shall be installed in attics and concealed spaces of/or containing combustible materials.

Section 903.3.1.3 is deleted in its entirety and replaced with the following:

903.3.1.3 NFPA 13D Sprinkler systems. Where allowed, automatic sprinkler systems installed in one-and two-family dwellings shall be installed throughout in accordance with NFPA 13D and fire department policy.