Appendix BB — FIRE-FLOW REQUIREMENTS FOR BUILDINGS
BB105 Fire-Flow Requirements for Buildings — 2025 California Fire Code
California Fire Code (Title 24, Part 9) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Fire Code (Title 24, Part 9) § BB105 · Effective January 1, 2026 · Official source: Building Standards Commission
BB105.1 The minimum fire flow and flow duration for school buildings shall be as specified in Table BB105.1.¶
Exception: A reduction in required fire flow of up to 75 percent is allowed when the building is provided with an approved automatic sprinkler system. When a reduction in fire flow is used, fire flow shall not be less than 1500 GPM.
APPENDIX BB—FIRE-FLOW REQUIREMENTS FOR BUILDINGS
TABLE BB105.1—MINIMUM REQUIRED FIRE-FLOW AND FLOW DURATION FOR BUILDINGS
| FIRE AREA (square feet) | FIRE AREA (square feet) | FIRE AREA (square feet) | FIRE AREA (square feet) | FIRE AREA (square feet) | FIRE-FLOW (gallons per minute)b |
FLOW DURATION (hours) |
|---|---|---|---|---|---|---|
| Type IA and IB a | Type IIA and IIIA a | Type IV and V-A a | Type IIB and IIIB a | Type V-B a | Type V-B a | Type V-B a |
| 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 m2, 1 gallon per minute = 3.785 L/ a. Types of construction are based on the_California Building Code._ b. Measured at 20 psi. |
APPENDIX BB-4 2025 CALIFORNIA FIRE CODE
CALIFORNIA FIRE CODE – MATRIX ADOPTION TABLE
APPENDIX C – FIRE HYDRANT LOCATIONS AND DISTRIBUTION
(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
| Adopting Agency | BSC | BSC- CG |
SFM | HCD | DSA | OSHPD | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopting Agency | BSC | BSC- CG |
T-24 | T-19* | 1 | 2 | 1/AC | AC | SS | 1 | 1R | 2 | 3 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Adopt Entire Chapter | |||||||||||||||||||||||
| Adopt Entire Chapter as amended (amended sections listed below) |
X | ||||||||||||||||||||||
| Adopt only those sections that are listed below |
|||||||||||||||||||||||
| [California Code of Regulations, Title 19, Division 1] |
|||||||||||||||||||||||
| Chapter / Section | |||||||||||||||||||||||
| C101.1 | X |
- The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Fire Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division I remain the same.
APPENDIX C-2 2025 CALIFORNIA FIRE CODE
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