Section B105
California Fire Code (Title 24, Part 9) · 2019 edition · updated 2026-09-10 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
FIRE-FLOW REQUIREMENTS FOR BUILDINGS
B105.1 One- and two-family dwellings, Group R-3 and R-4¶
buildings and townhouses. The minimum fire-flow and flow duration requirements for one- and two-family dwellings, Group R-3 and R-4 buildings and townhouses shall be as specified in Tables B105.1(1) and B105.1(2).
Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.
100735044
APPENDIX B
TABLE B105.1(1) REQUIRED FIRE FLOW FOR ONE- AND TWO-FAMILY DWELLINGS, GROUP R-3 AND R-4 BUILDINGS AND TOWNHOUSES
| FIRE-FLOW CALCULATION AREA (square feet) |
AUTOMATIC SPRINKLER SYSTEM (Design Standard) |
MINIMUM FIRE FLOW (gallons per minute) |
FLOW DURATION (hours) |
|---|---|---|---|
| 0–3,600 | No automatic sprinkler system | 1,000 | 1 |
| 3,601 and greater | No automatic sprinkler system | Value in Table B105.1(2) |
Duration in Table B105.1(2) at the required fire-flow rate |
| 0–3,600 | Section 903.3.1.3 of the_California Fire Code_ or Section_313.3_of the_California Residential Code_ |
500 | 1/2 |
| 3,601 and greater | Section 903.3.1.3 of the_California Fire Code_ or Section_313.3_of the_California Residential Code_ |
1/2 value in Table B105.1(2) |
1 |
For SI: 1 square foot = 0.0929 m 2, 1 gallon per minute = 3.785 L/m.
TABLE B105.1(2) REFERENCE TABLE FOR TABLES B105.1(1) AND B105.2
| FIRE-FLOW CALCULATION AREA (square feet) | FIRE-FLOW CALCULATION AREA (square feet) | FIRE-FLOW CALCULATION AREA (square feet) | FIRE-FLOW CALCULATION AREA (square feet) | FIRE-FLOW CALCULATION AREA (square feet) | FIRE FLOW (gallons per minute)b |
FLOW DURATION (hours) |
|---|---|---|---|---|---|---|
| Type IA and IBa | Type IIA and IIIAa | Type IV and V-Aa | Type IIB and IIIBa | Type V-Ba | Type V-Ba | Type V-Ba |
| 0-22,700 | 0-12,700 | 0-8,200 | 0-5,900 | 0-3,600 | 1,500 | 2 |
| 22,701-30,200 | 12,701-17,000 | 8,201-10,900 | 5,901-7,900 | 3,601-4,800 | 1,750 | 1,750 |
| 30,201-38,700 | 17,001-21,800 | 10,901-12,900 | 7,901-9,800 | 4,801-6,200 | 2,000 | 2,000 |
| 38,701-48,300 | 21,801-24,200 | 12,901-17,400 | 9,801-12,600 | 6,201-7,700 | 2,250 | 2,250 |
| 48,301-59,000 | 24,201-33,200 | 17,401-21,300 | 12,601-15,400 | 7,701-9,400 | 2,500 | 2,500 |
| 59,001-70,900 | 33,201-39,700 | 21,301-25,500 | 15,401-18,400 | 9,401-11,300 | 2,750 | 2,750 |
| 70,901-83,700 | 39,701-47,100 | 25,501-30,100 | 18,401-21,800 | 11,301-13,400 | 3,000 | 3 |
| 83,701-97,700 | 47,101-54,900 | 30,101-35,200 | 21,801-25,900 | 13,401-15,600 | 3,250 | 3,250 |
| 97,701-112,700 | 54,901-63,400 | 35,201-40,600 | 25,901-29,300 | 15,601-18,000 | 3,500 | 3,500 |
| 112,701-128,700 | 63,401-72,400 | 40,601-46,400 | 29,301-33,500 | 18,001-20,600 | 3,750 | 3,750 |
| 128,701-145,900 | 72,401-82,100 | 46,401-52,500 | 33,501-37,900 | 20,601-23,300 | 4,000 | 4 |
| 145,901-164,200 | 82,101-92,400 | 52,501-59,100 | 37,901-42,700 | 23,301-26,300 | 4,250 | 4,250 |
| 164,201-183,400 | 92,401-103,100 | 59,101-66,000 | 42,701-47,700 | 26,301-29,300 | 4,500 | 4,500 |
| 183,401-203,700 | 103,101-114,600 | 66,001-73,300 | 47,701-53,000 | 29,301-32,600 | 4,750 | 4,750 |
| 203,701-225,200 | 114,601-126,700 | 73,301-81,100 | 53,001-58,600 | 32,601-36,000 | 5,000 | 5,000 |
| 225,201-247,700 | 126,701-139,400 | 81,101-89,200 | 58,601-65,400 | 36,001-39,600 | 5,250 | 5,250 |
| 247,701-271,200 | 139,401-152,600 | 89,201-97,700 | 65,401-70,600 | 39,601-43,400 | 5,500 | 5,500 |
| 271,201-295,900 | 152,601-166,500 | 97,701-106,500 | 70,601-77,000 | 43,401-47,400 | 5,750 | 5,750 |
| 295,901-Greater | 166,501-Greater | 106,501-115,800 | 77,001-83,700 | 47,401-51,500 | 6,000 | 6,000 |
| — | — | 115,801-125,500 | 83,701-90,600 | 51,501-55,700 | 6,250 | 6,250 |
| — | — | 125,501-135,500 | 90,601-97,900 | 55,701-60,200 | 6,500 | 6,500 |
| — | — | 135,501-145,800 | 97,901-106,800 | 60,201-64,800 | 6,750 | 6,750 |
| — | — | 145,801-156,700 | 106,801-113,200 | 64,801-69,600 | 7,000 | 7,000 |
| — | — | 156,701-167,900 | 113,201-121,300 | 69,601-74,600 | 7,250 | 7,250 |
| — | — | 167,901-179,400 | 121,301-129,600 | 74,601-79,800 | 7,500 | 7,500 |
| — | — | 179,401-191,400 | 129,601-138,300 | 79,801-85,100 | 7,750 | 7,750 |
| — | — | 191,401-Greater | 138,301-Greater | 85,101-Greater | 8,000 | 8,000 |
For SI: 1 square foot = 0.0929 m 2, 1 gallon per minute = 3.785 L/m, 1 pound per square inch = 6.895 kPa. a. Types of construction are based on the California Building Code . b. Measured at 20 psi residual pressure.
746 2019 CALIFORNIA FIRE CODE
Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.
100735044
APPENDIX B
TABLE B105.2 REQUIRED FIRE FLOW FOR BUILDINGS OTHER THAN ONE- AND TWO-FAMILY DWELLINGS, GROUP R-3 AND R-4 BUILDINGS AND TOWNHOUSES
| AUTOMATIC SPRINKLER SYSTEM (Design Standard) |
MINIMUM FIRE FLOW (gallons per minute) |
FLOW DURATION (hours) |
|---|---|---|
| No automatic sprinkler system | Value in Table B105.1(2) |
Duration in Table B105.1(2) |
| Section 903.3.1.1 of the_California Fire Code_ | 25% of the value in Table B105.1(2)a |
Duration in Table B105.1(2) at the reduced flow rate |
| Section 903.3.1.2 of the_California Fire Code_ | 25% of the value in Table B105.1(2)b | Duration in Table B105.1(2) at the reduced flow rate |
For SI: 1 gallon per minute = 3.785 L/m. a. The reduced fire flow shall be not less than 1,000 gallons per minute. b. The reduced fire flow shall be not less than 1,500 gallons per minute.
B105.2 Buildings other than one- and two-family dwell-¶
ings, Group R-3 and R-4 buildings and townhouses. The minimum fire-flow and flow duration for buildings other than one- and two-family dwellings, Group R-3 and R-4 buildings and townhouses shall be as specified in Tables B105.2 and B105.1(2).
Exception: [SFM] Group B, S-2 and U occupancies hav- ing a floor area not exceeding 1,000 square feet, primarily constructed of noncombustible exterior walls with wood or steel roof framing, having a Class A roof assembly, with uses limited to the following or similar uses:
1. California State Parks buildings of an accessory nature (restrooms).
2. Safety roadside rest areas, (SRRA), public restrooms.
3. Truck inspection facilities, (TIF), CHP office space and vehicle inspection bays.
4. Sand/salt storage buildings, storage of sand and salt.
B105.3 Water supply for buildings equipped with an auto-¶
matic sprinkler system. For buildings equipped with an approved automatic sprinkler system, the water supply shall be capable of providing the greater of:
The automatic sprinkler system demand, including hose stream allowance.
The required fire flow.
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