Laboratories (Group L) & special‑use hazardous areas

Grounded in the retrieved California Building Code — click a citation to read the verbatim passage:

• CBC § 452.1.5 High relevance — show source text

  _ The egress system shall comply with the requirements of Section 709 for smoke barriers. 3.6. The building is equipped with an automatic sprinkler system throughout.

  452.1.5 Special hazards. School classrooms constructed after January 1, 1990, not equipped with automatic sprinkler systems, which have metal grilles or bars on all their windows and do not have at least two exit doors within 3 feet (914 mm) of each end of the classroom opening to the exterior of the building or to a common hallway used for evacuation purposes, shall have an inside release for the grilles or bars on at least one window farthest from the exit doors. The window or windows with the inside release shall be clearly marked as emergency exits.

  452.1.6 Class I, II or III-A flammable liquids shall not be placed, stored or used in Group E occupancies, except in approved quantities as necessary in laboratories and classrooms and for operation and maintenance as set forth in the California Fire Code.

  SECTION 453—GROUP L [SFM]

  453.1 Scope. The provisions of this section shall apply to buildings or structures, or portions thereof, containing one or more Group L laboratory suites as defined in Section 202.

  The provisions of this section are optional and may apply to buildings or structures. See Section 304 for Group B Laboratories.

  453.1.1 Technical report. The enforcing agency may require a technical opinion and report to identify and develop methods of protection from the hazards presented by the hazardous materials. A qualified person, firm or corporation, approved by the enforcing agency, shall prepare the opinion and report, and shall be provided without charge to the enforcing agency. The opinion and report may include, but is not limited to, the preparation of a hazardous material management plan (HMMP); chemical analysis; recommen- dations for methods of isolation, separation, containment or protection of hazardous materials or processes, including appropriate engineering controls to be applied; the extent of changes in the hazardous behavior to be anticipated under conditions of exposure to fire or from hazard control procedures; and the limitations or conditions of use necessary to achieve and maintain control of the

  2025 CALIFORNIA BUILDING CODE 4-67

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY AND USE

  hazardous materials or operations. The report shall be entered into the files of the code enforcement agencies. Proprietary and trade secret information shall be protected under the laws of the state or jurisdiction having authority.

  453.2 Definitions. The following terms are defined in Chapter 2:

  LABORATORY SUITE.

  [F] LIQUID TIGHT FLOOR.

  453.3 Laboratory suite requirements. 453.3.1 The gross floor area of an individual laboratory suite shall not exceed 10,000 square feet (929 m [2] ).

  453.3.2 An individual laboratory suite shall not serve more than a single tenant.

  Exception: An individual laboratory suite shall have a responsible party or department for all hazardous materials within a suite.

  453.4 Construction.

  453.4.1 Separation of laboratory suites.

• CBC § 8.67 High relevance — show source text

  000 Btu per
  hour input|1 hour or provide automatic sprinkler system| |Rooms with boilers where the largest piece of equipment is over 15 psi
  and 10 horsepower|1 hour or provide automatic sprinkler system| |Refrigerant machinery room|1 hour or provide automatic sprinkler system| |Hydrogen fuel gas rooms, not classified as Group H|1 hour in Group B, F, M, S and U occupancies; 2 hours in Group A, E, I
  and R occupancies.| |Incinerator rooms|2 hours and provide automatic sprinkler system| |Paint shops, not classified as Group H, located in occupancies other
  than Group F|2 hours; or 1 hour and provide automatic sprinkler system| |In Group E occupancies, laboratories and vocational shops not classi-
  fied as Group H|1 hour or provide automatic sprinkler system| |[SFM]Rooms or areas with special hazards such as laboratories, voca-
  tional shops and other such areas not classified as Group H, located in
  Group E occupancies where hazardous materials in quantities not
  exceeding the maximum allowable quantity are used or stored.|1 hour| |In Group I-2 occupancies, laboratories not classified as Group H|1 hour_a_| |In ambulatory care facilities, laboratories not classified as Group H|1 hour or provide automatic sprinkler system| |Laundry rooms over 100 square feet|1 hour or provide automatic sprinkler system| |In Group I-2, laundry rooms over 100 square feet|1 hour and provide automatic sprinkler system_a_| |Group I-3 cells and Group I-2 patient rooms equipped with padded
  surfaces|1 hour and provide automatic sprinkler system_a_| |In Group I-2, physical plant maintenance shops|1 hour and provide automatic sprinkler system_a_| |In ambulatory care facilities or Group I-2 occupancies, waste and linen
  collection rooms with containers that have an aggregate volume of
  8.67 cubic feet or greater|1 hour and provide automatic sprinkler system_a_| |In other than ambulatory care facilities and Group I-2 occupancies,
  waste and linen collection rooms over 100 square feet|1 hour or provide automatic sprinkler system| |In ambulatory care facilities or Group I-2 occupancies, storage rooms
  greater than 50 square feet|1 hour and provide automatic sprinkler system_a_| |Electrical installations and transformers|See Sections 110.26 through 110.34 and Sections 450.8 through 450.48
  of the_California Electrical Code_for protection and separation
  requirements.| |For SI: 1 square foot = 0.0929 m2, 1 pound per square inch (psi) = 6.9 kPa, 1 British thermal unit (Btu) per hour = 0.293 watts, 1 horsepower = 746 watts, 1 gallon = 3.785 L,
  1 cubic foot = 0.0283 m3.
  a._ [SFM]_Fire barrier protection and automatic sprinkler protection required throughout the fire area in I-2 occupancies as indicated.|For SI: 1 square foot = 0.0929 m2, 1 pound per square inch (psi) = 6.9 kPa, 1 British thermal unit (Btu) per hour = 0.293 watts, 1 horsepower = 746 watts, 1 gallon = 3.785 L,
  1 cubic foot = 0.0283 m3.
  _a.

• CBC § 903.2.2.2 High relevance — show source text

  Exception: Floors classified as an open parking garage are not required to be sprinklered.

  [F] 903.2.2.2 Laboratories involving testing, research and development. An automatic sprinkler system shall be installed throughout the fire areas utilized for the research and development or testing of lithium-ion or lithium metal batteries.

  [F] 903.2.3 Group E. An automatic sprinkler system shall be provided for Group E occupancies as follows:

  1. Throughout all Group E fire areas greater than 12,000 square feet (1115 m [2] ) in area.
  2. The Group E fire area is located on a floor other than a level of exit discharge serving such occupancies. Exception: In buildings where every classroom has not fewer than one exterior exit door at ground level, an automatic sprinkler system is not required in any area below the lowest level of exit discharge serving that area.
  3. The Group E fire area has an occupant load of 300 or more. 4. In rooms or areas with special hazards such as laboratories, vocational shops and other such areas where hazardous mate- rials in quantities not exceeding the maximum allowable quantity are used or stored. 5. Throughout any Group E structure greater than 12,000 square feet (1115 m [2] ) in area, which contains more than one fire area, and which is separated into two or more buildings by fire walls of not less than 4-hour fire resistance rating without openings. 6. For public school state funded construction projects see Section 903.2.19. 7. For public school campuses: Kindergarten through 12th grade, see Section 903.2.20.

  [F] 903.2.4 Group F-1. An automatic sprinkler system shall be provided throughout all buildings containing a Group F-1 occupancy where one of the following conditions exists:

  1. A Group F-1 fire area exceeds 12,000 square feet (1115 m [2] ).
  2. A Group F-1 fire area is located more than three stories above grade plane.
  3. The combined area of all Group F-1 fire areas on all floors, including any mezzanines, exceeds 24,000 square feet (2230 m [2] ).
  4. A Group F-1 occupancy is used to manufacture lithium-ion or lithium metal batteries.
  5. A Group F-1 occupancy is used to manufacture vehicles, energy storage systems or equipment containing lithium-ion or lithium metal batteries where the batteries are installed as part of the manufacturing process.

  [F] 903.2.4.1 Woodworking operations. An automatic sprinkler system shall be provided throughout all Group F-1 occupancy fire areas that contain woodworking operations in excess of 2,500 square feet (232 m [2] ) in area that generate finely divided combustible waste or use finely divided combustible materials.

  [SFM] A fire wall of less than four-hour fire-resistance rating without openings, or any fire wall with openings, shall not be used to establish separate fire areas.

  [F] 903.2.4.2 Group F-1 distilled spirits. An automatic sprinkler system shall be provided throughout a Group F-1 fire area used for the manufacture of distilled spirits.

  [F] 903.2.4.3 Group F-1 upholstered furniture or mattresses. An automatic sprinkler system shall be provided throughout a Group F-1 fire area that exceeds 2,500 square feet (232 m [2] ) used for the manufacture of upholstered furniture or

  mattresses.

• California Building Code High relevance — show source text

  SEPARATION AND
  CLEARANCE REQUIREMENTS|DB
  T
  DUCT
  T
  G
  C
  S
  P
  MINIMUM SEPARATION AND
  CLEARANCE REQUIREMENTS|G|DUCT
  T|DB
  T|C|S|P| |G|(GAS) SEE NOTES 4, 7 & 13|
  |12"|12"|12"|6"|12"| |T|(TELEPHONE) DUCT|
  12"||1"|1"|12"|12"| |T|DIRECT
  BURY
  (TELEPHONE)|12"|1"||1"|12"|12"| |C|(CATV)|12"|1"|1"||12"|12"| |S|(ELECTRIC SECONDARY)|6"|12"|12"|12"||3"| |P|(ELECTRIC PRIMARY)|12"|12"|12"|12"|3"|| |SL|SEE
  NOTE 5
  (STREETLIGHT)|6"|12"|12"|12"|1"|3"|

  |TYPICAL
  DISTRIBUTION TRENCH
  Joint Trench − Franchise Area or P.U.E.
  18 INCHES
  MINIMUM
  STREET
  SIDE
  MIN.
  24"
  (NON PG&E)
  (PREFERRED)
  **
  Minimum
  T C SL 5"
  54"
  6"
  G 5"
  See Note 5
  7"
  3" MIN
  P SL S 7"
  FIG. 1
  Placement of the Distribution Trench within a P.U.E. is the preferred method. Trenching in the
  Franchise Area should only be used when a P.U.E. is unobtainable or otherwise infeasible.
  Increase cover to 30" in the street area (see Note 3).
  ** Separation must be 12" unless a reduction (6") is mutually agreed upon by affected utilities.|TYPICAL
  SERVICE TRENCH
  18 INCHES
  MINIMUM
  *
  18"
  MINIMUM
  T C (SEE NOTE 7) 3"
  39"
  12"
  6"
  S Min. G 4"
  BEDDING MATERIAL 2"
  FIG. 2
  (View facing Distribution Trench)
  MINIMUM SEPARATION AND
  CLEARANCE REQUIREMENTS
  DUCT DB
  G T T C S P
  G (GAS) SEE NOTES 4,

• CBC § 0.249 High relevance — show source text

  24
  |0.249
  |0.048
  |–
  | |4.94|0.326|0.063|–| |5.65|0.413|0.080|–| |6.36|0.507|0.098|–| |7.06|0.611|0.118|0.030| |7.77|0.723|0.139|0.035| |8.47|0.843|0.162|0.041| |9.18|0.969|0.187|0.047| |9.89|1.108|0.212|0.053| |10.59|1.252|0.240|0.060| |12.36|1.647|0.315|0.079| |14.12
  |2.090
  |0.398
  |0.100
  | |15.89
  |2.580
  |0.490
  |0.123
  | |17.66|3.116|0.591|0.148| |19.42|–|0.701|0.176| |21.19|–|0.818|0.205| |22.95|–|0.944|0.236| |24.72|–|1.078|0.268| |28.25|–|1.369|0.341| |31.78|–|1.690|0.421| |35.31|–|2.043|0.509| |38.84|–|2.425|0.603| |42.37|–|2.838|0.705| |45.90
  |–
  |3.280
  |0.814
  | |49.43|–|3.751|0.929| |52.97|–|4.249|1.052| |56.50|–|–|1.181| |60.03|–|–|1.318| |63.56|–|–|1.461| |67.09|–|–|1.611| |70.62|–|–|1.768| |81.21|–|–|2.276| |88.28|–|–|2.647| |95.34|–|–|3.044|

  FLOW RATE (SCFM)1	PRESSURE DROP (psi) PER 100 FEET2	Col3	Col4
  FLOW RATE (SCFM)1	1⁄2 INCH PIPE	3⁄4 INCH PIPE	1 INCH PIPE
  5.30	0.126	0.024	–
  10.59	0.430	0.082	–
  15.89	0.886	0.168	–
  21.19	1.485	0.281	–
  26.48	2.220	0.419	–
  31.78	3.089	0.581	–
  37.08	4.087	0.766	–
  42.37	–	0.975	–
  47.67	–	1.206	–
  52.97	–	1.460	0.361
  58.26	–	1.736	0.429
  63.56	–	2.033	0.502
  68.85	–	2.

• CBC § 903.2.2.2 High relevance — show source text

  In buildings where ambulatory care is provided on levels other than the level of exit discharge, an automatic sprinkler system shall be installed throughout the entire floor as well as all floors below where such care is provided, and all floors between the level of ambulatory care and the nearest level of exit discharge, the level of exit discharge, and all floors below the level of exit discharge.

  Exception: Floors classified as an open parking garage are not required to be sprinklered.

  903.2.2.2 Laboratories involving research and development or testing. An automatic sprinkler system shall be installed throughout the fire areas utilized for the research and development or testing of lithium-ion or lithium metal batteries.

  903.2.3 Group E. An automatic sprinkler system shall be provided for Group E occupancies as follows:

  1. Throughout all Group E fire areas greater than 12,000 square feet (1115 m [2] ) in area.
  2. The Group E fire area is located on a floor other than a level of exit discharge serving such occupancies.

  9-14 2025 CALIFORNIA FIRE CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  FIRE PROTECTION AND LIFE SAFETY SYSTEMS

  Exception: In buildings where every classroom has not fewer than one exterior exit door at ground level, an automatic sprinkler system is not required in any area below the lowest level of exit discharge serving that area. 3. The Group E fire area has an occupant load of 300 or more. 4. In rooms or areas with special hazards such as laboratories, vocational shops and other such areas where hazardous mate- rials in quantities not exceeding the maximum allowable quantity are used or stored. 5. Throughout any Group E structure greater than 12,000 square feet (1115 m [2] ) in area, which contains more than one fire area, and which is separated into two or more buildings by fire walls of not less than 4-hour fire-resistance rating without openings. 6. For public school state-funded construction projects see Section 903.2.19. 7. For public school campuses, Kindergarten through 12th grade, see Section 903.2.20.

  903.2.4 Group F-1. An automatic sprinkler system shall be provided throughout all buildings containing a Group F-1 occupancy where one of the following conditions exists:

  1. A Group F-1 fire area exceeds 12,000 square feet (1115 m [2] ).
  2. A Group F-1 fire area is located more than three stories above grade plane.
  3. The combined area of all Group F-1 fire areas on all floors, including any mezzanines, exceeds 24,000 square feet (2230 m [2] ).
  4. A Group F-1 occupancy is used to manufacture lithium-ion or lithium metal batteries.
  5. A Group F-1 occupancy is used to manufacture vehicles, energy storage systems or equipment containing lithium-ion or lithium metal batteries where the batteries are installed as part of the manufacturing process.

  903.2.4.1 Woodworking operations. An automatic sprinkler system shall be provided throughout all Group F-1 occupancy fire areas that contain woodworking operations in excess of 2,500 square feet (232 m [2] ) in area that generate finely divided combustible waste or use finely divided combustible materials. [SFM] A fire wall of less than 4-hour fire-resistance rating with- out openings, or any fire wall with openings, shall not be used to establish separate fire areas.

• CBC § 1323.1.4 High relevance — show source text

  TABLE 1323.1.4(6) PRESSURE LOSS FOR VACUUM (CATEGORY 3) (continued)

  FLOW RATE (SCFM)1	VACUUM LOSS (inch of mercury) PER 100 FEET FOR PLASTIC TUBE2	Col3	Col4	Col5	Col6
  FLOW RATE (SCFM)1	3⁄4 INCH TUBE	1 INCH TUBE	11⁄4 INCH TUBE	11⁄2 INCH TUBE	2 INCH TUBE
  13.42	1.396	0.356	0.124	0.052	0.014
  14.12	1.525	0.389	0.135	0.057	0.015
  14.83	1.662	0.424	0.147	0.062	0.016
  15.54	1.803	0.460	0.160	0.068	0.017
  16.24	1.948	0.496	0.172	0.073	0.019
  16.95	2.099	0.535	0.186	0.078	0.020
  17.66	2.256	0.574	0.199	0.084	0.022
  18.36	2.415	0.615	0.213	0.090	0.023
  19.07	2.581	0.657	0.228	0.096	0.025
  19.77	2.750	0.699	0.243	0.102	0.026
  20.48	2.925	0.744	0.258	0.109	0.028
  21.19	3.106	0.790	0.274	0.115	0.030
  24.72	4.074	1.034	0.358	0.151	0.039
  28.25	–	1.307	0.452	0.190	0.049
  31.78	–	1.608	0.556	0.234	0.060
  35.31	–	1.936	0.669	0.281	0.072
  38.84	–	2.291	0.791	0.332	0.085
  42.37	–	2.672	0.922	0.387	0.099
  45.90	–	3.078	1.062	0.446	0.113
  49.43	–	3.510	1.211	0.508	0.129
  52.97	–	3.969	1.368	0.574	0.146
  56.50	–	4.450	1.534	0.643	0.163
  63.56	–	–	1.890	0.792	0.201
  70.62	–	–	2.278	0.954	0.242
  77.68	–	–	2.699	1.130	0.286
  84.74	–	–	3.151	1.

• CBC § 508.5.8 High relevance — show source text

  508.5.8 Structural. Floors within a live/work unit shall be designed for the live loads in Table 1607.1, based on the function within the space.

  Exception: Residential areas of live/work units constructed in accordance with the California Residential Code shall not be required to comply with Table 1607.1.

  [BE] 508.5.9 Accessibility. Accessibility shall be designed in accordance with Chapter 11A and/or 11B, when applicable, for the function served.

  508.5.10 Ventilation. The applicable ventilation requirements of the California Mechanical Code shall apply to each area within the live/work unit for the function within that space.

  508.5.11 Plumbing facilities. The nonresidential area of the live/work unit shall be provided with minimum plumbing facilities as specified by the California Plumbing Code, based on the function of the nonresidential area. Where the nonresidential area of the live/work unit is required to be accessible, the plumbing fixtures specified by the California Plumbing Code shall be accessible.

  SECTION 509—INCIDENTAL USES

  509.1 General Incidental uses located within single occupancy or mixed occupancy buildings shall comply with the provisions of this section. Incidental uses are ancillary functions associated with a given occupancy that generally pose a greater level of risk to that occupancy and are limited to those uses specified in Table 509.1.

  Exception: Incidental uses within and serving a dwelling unit are not required to comply with this section.

  �

  [F] TABLE 509.1—INCIDENTAL USES	Col2
  ROOM OR AREA	SEPARATION AND/OR PROTECTION
  Furnace room where any piece of equipment is over 400,000 Btu per hour input	1 hour or provide automatic sprinkler system
  Rooms with boilers where the largest piece of equipment is over 15 psi and 10 horsepower	1 hour or provide automatic sprinkler system
  Refrigerant machinery room	1 hour or provide automatic sprinkler system
  Hydrogen fuel gas rooms, not classified as Group H	1 hour in Group B, F, M, S and U occupancies; 2 hours in Group A, E, I and R occupancies.
  Incinerator rooms	2 hours and provide automatic sprinkler system
  Paint shops, not classified as Group H, located in occupancies other than Group F	2 hours; or 1 hour and provide automatic sprinkler system
  In Group E occupancies, laboratories and vocational shops not classi- fied as Group H	1 hour or provide automatic sprinkler system
  [SFM]Rooms or areas with special hazards such as laboratories, voca- tional shops and other such areas not classified as Group H, located in Group E occupancies where hazardous materials in quantities not exceeding the maximum allowable quantity are used or stored.	1 hour
  In Group I-2 occupancies, laboratories not classified as Group H	1 hour_a_
  In ambulatory care facilities, laboratories not classified as Group H	1 hour or provide automatic sprinkler system
  Laundry rooms over 100 square feet	1 hour or provide automatic sprinkler system
  In Group I-2, laundry rooms over 100 square feet	1 hour and provide automatic sprinkler system_a_
  Group I-3 cells and Group I-2 patient rooms equipped with padded surfaces	1 hour and provide automatic sprinkler system_a_
  In Group I-2,

• CBC § 903.2.1.7 High relevance — show source text

  Exception: Open parking garages of Type I or Type II construction.

  [F] 903.2.1.7 Multiple fire areas. An automatic sprinkler system shall be provided where multiple fire areas of Group A-1, A-2, A-3 or A-4 occupancies share exit or exit access components and the combined occupant load of theses fire areas is 300 or more.

  [F] 903.2.2 Group B. An automatic sprinkler system shall be provided for Group B occupancies as required in Sections 903.2.2.1.1 and 903.2.2.2.

  [F] 903.2.2.1 Ambulatory care facilities. An automatic sprinkler system shall be installed throughout the entire floor containing an ambulatory care facility where either of the following conditions exist at any time:

  1. Four or more care recipients are incapable of self-preservation.
  2. One or more care recipients that are incapable of self-preservation are located at other than the level of exit discharge serving such a facility.

  In buildings where ambulatory care is provided on levels other than the level of exit discharge, an automatic sprinkler system shall be installed throughout the entire floor as well as all floors below where such care is provided, and all floors between the level of ambulatory care and the nearest level of exit discharge, the level of exit discharge, and all floors below the level of exit discharge.

  Exception: Floors classified as an open parking garage are not required to be sprinklered.

  [F] 903.2.2.2 Laboratories involving testing, research and development. An automatic sprinkler system shall be installed throughout the fire areas utilized for the research and development or testing of lithium-ion or lithium metal batteries.

  [F] 903.2.3 Group E. An automatic sprinkler system shall be provided for Group E occupancies as follows:

  1. Throughout all Group E fire areas greater than 12,000 square feet (1115 m [2] ) in area.
  2. The Group E fire area is located on a floor other than a level of exit discharge serving such occupancies. Exception: In buildings where every classroom has not fewer than one exterior exit door at ground level, an automatic sprinkler system is not required in any area below the lowest level of exit discharge serving that area.
  3. The Group E fire area has an occupant load of 300 or more. 4. In rooms or areas with special hazards such as laboratories, vocational shops and other such areas where hazardous mate- rials in quantities not exceeding the maximum allowable quantity are used or stored. 5. Throughout any Group E structure greater than 12,000 square feet (1115 m [2] ) in area, which contains more than one fire area, and which is separated into two or more buildings by fire walls of not less than 4-hour fire resistance rating without openings. 6. For public school state funded construction projects see Section 903.2.19. 7. For public school campuses: Kindergarten through 12th grade, see Section 903.2.20.
• CBC § 304.8 High relevance — show source text

  Groups shall be as classified in accordance with NFPA 409.
  c. Membrane_structures_ complying with Section 3102 shall be classified as a Group IV hangar.|For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
  a. Aircraft hangars with a door height greater than 28 feet shall be provided with fire suppression for a Group I hangar regardless of maximum fire area.
  b. Groups shall be as classified in accordance with NFPA 409.
  c. Membrane_structures_ complying with Section 3102 shall be classified as a Group IV hangar.|For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
  a. Aircraft hangars with a door height greater than 28 feet shall be provided with fire suppression for a Group I hangar regardless of maximum fire area.
  b. Groups shall be as classified in accordance with NFPA 409.
  c. Membrane_structures_ complying with Section 3102 shall be classified as a Group IV hangar.|

  2025 CALIFORNIA BUILDING CODE 4-35

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY AND USE

  [F] 412.3.6.1 Hazardous operations. Any Group III aircraft hangar according to Table 412.3.6 that contains hazardous operations including, but not limited to, the following shall be provided with a Group I or II fire suppression system in accordance with NFPA 409 as applicable:

  1. Doping.

  2. Hot work including, but not limited to, welding, torch cutting and torch soldering.

  3. Fuel transfer.

  4. Fuel tank repair or maintenance not including defueled tanks in accordance with NFPA 409, inerted tanks or tanks that have never been fueled.

  5. Spray finishing operations.

  6. Total fuel capacity of all aircraft within the unsprinklered single fire area in excess of 1,600 gallons (6057 L).

  7. Total fuel capacity of all aircraft within the maximum single fire area in excess of 7,500 gallons (28 390 L) for a hangar with an automatic sprinkler system in accordance with Section 903.3.1.1.

  [F] 412.3.6.2 Separation of maximum single fire areas. Maximum single fire areas established in accordance with hangar classification and construction type in Table 412.3.6 shall be separated by 2-hour fire walls constructed in accordance with Section 706. In determining the maximum single fire area as set forth in Table 412.3.6, ancillary uses that are separated from aircraft servicing areas by a fire barrier of not less than 1 hour, constructed in accordance with Section 707, shall not be included in the area.

  412.4 Residential aircraft hangars. Residential aircraft hangars shall comply with Sections 412.4.1 through 412.4.5.

• CBC § 1701A.1.1 High relevance — show source text

  1701A.1.1 Application. The scope of application of Chapter 17A is as follows: 1. Structures regulated by the Division of the State Architect-Structural Safety, which include those applications listed in Sections 1.9.2.1 (DSA-SS) and 1.9.2.2 (DSA-SS/CC). These applications include public elementary and secondary schools, community colleges and state-owned or state-leased essential services buildings. 2. Structures regulated by the Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development (OSHPD), which include those applications listed in Sections 1.10.1 and 1.10.4. These applications include hospitals and correctional treatment centers.

  1701A.1.2 Amendments in this chapter. DSA-SS, DSA-SS/CC, OSHPD adopt this chapter and all amendments.

  Exceptions: Amendments adopted by only one agency appear in this chapter preceded with the appropriate acronym of the adopting agency, as follows: 1. Division of the State Architect - Structural Safety:

  [DSA-SS] For applications listed in Section 1.9.2.1.

  [DSA-SS/CC] For applications listed in Section 1.9.2.2. 2. Office of Statewide Hospital Planning and Development:

  [OSHPD 1] – For applications listed in Section 1.10.1.

  [OSHPD 4] – For applications listed in Section 1.10.4.

  1701A.1.3 Reference to other chapters.

  1701A.1.3.1 [DSA-SS/CC] Where reference within this chapter is made to sections in Chapters 16A, 19A, 21A, 22A and 23, the provi- sions in Chapters 16, 19, 21, 22 and 23, respectively, shall apply instead as defined in Section 1.9.2.2. Referenced sections may not directly correlate, but the corresponding DSA-SS/CC sections to such references still apply.

  1701A.3 Special inspections and tests. [OSHPD 1 & 4] In addition to the inspector(s) of record required by the California Administrative Code (CCR, Title 24, Part 1), Section 7-144, the owner shall employ one or more approved agencies to provide special inspections and tests during construction on the types of work listed under Chapters 14, 15, 17A, 18A, 19A, 20, 21A, 22A, 23, 24 and 25, and noted in the Test, Inspection and Observation (TIO) program required by Sections 7-141, 7-145 and 7-149, of the California Administrative Code. Test, Inspection and Observation (TIO) program shall satisfy requirements of Section 1704A.

• CBC § 1705.16 Medium relevance — show source text

  [BF] 1705.16 Intumescent fire-resistive materials. Special inspections and tests for intumescent fire-resistive materials applied to structural elements and decks shall be performed in accordance with AWCI 12-B. Special inspections and tests shall be based on the fire-resistance design as designated in the approved construction documents. Special inspections and tests shall be performed during construction. Additional visual inspection shall be performed after the rough installation and, where applicable, prior to the concealment of electrical, automatic sprinkler, mechanical and plumbing systems.

  [BF] 1705.17 Exterior insulation and finish systems (EIFS). Special inspections shall be required for all EIFS applications.

  Exceptions:

  1. Special inspections shall not be required for EIFS applications installed over a water-resistive barrier with a means of draining moisture to the exterior.
  2. Special inspections shall not be required for EIFS applications installed over masonry or concrete walls.

  [BF] 1705.17.1 Water-resistive barrier coating. A water-resistive barrier coating complying with ASTM E2570 requires special inspection of the water-resistive barrier coating where installed over a sheathing substrate.

  17-18 2025 CALIFORNIA BUILDING CODE

  on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

  SPECIAL INSPECTIONS AND TESTS

  [BF] 1705.18 Fire-resistant penetrations and joints. In high-rise buildings, in buildings assigned to Risk Category III or IV, or in fire areas containing Group R occupancies with an occupant load greater than 250, special inspections for through-penetrations, membrane penetration firestops, fire-resistant joint systems and perimeter fire containment systems that are tested and listed in accordance with Sections 714.4.1.2, 714.5.1.2, 715.3.1 and 715.4 shall be in accordance with Section 1705.18.1 or 1705.18.2.

  [OSHPD 1R, 2 & 5] Buildings assigned to all Risk Categories shall be subject to special inspections for fire-resistant penetrations and joints.

  [BF] 1705.18.1 Penetration firestops. Inspections of penetration firestop systems that are tested and listed in accordance with Sections 714.4.1.2 and 714.5.1.2 shall be conducted by an approved agency in accordance with ASTM E2174.

  [BF] 1705.18.2 Fire-resistant joint systems. Inspection of fire-resistant joint systems that are tested and listed in accordance with Sections 715.3.1 and 715.4 shall be conducted by an approved agency in accordance with ASTM E2393.

  [F] 1705.19 Testing for smoke control. Smoke control systems shall be tested by a special inspector.

  [F] 1705.19.1 Testing scope. The test scope shall be as follows:

  1. During erection of ductwork and prior to concealment for the purposes of leakage testing and recording of device location.

  2. Prior to occupancy and after sufficient completion for the purposes of pressure difference testing, flow measurements and detection and control verification.

  [F] 1705.19.2 Qualifications. Approved agencies for smoke control testing shall have expertise in fire protection engineering, mechanical engineering and certification as air balancers.