CBC · California Building Code

Compressed gases, corrosives and cryogenic fluids—where to find CBC requirements

If you store compressed gases, corrosives or cryogenic fluids in California start with CBC § 307.1 to see if quantities push your space into Group H, check § 307.6 for corrosives (H‑4), and follow § 414.1.2 which tells you the CBC uses the Fire and Mechanical Codes for the material‑specific technical rules (tables in Chapter 3 and the Fire Code chapters give the exact storage, containment, ventilation and permit thresholds).

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Last reviewed: July 5, 2026

What the code requires — 2‑4 sentences

The California Building Code (CBC) treats hazardous materials by hazard class and quantity and directs designers to material‑specific rules. The CBC assigns hazardous occupancies (Group H) and gives the thresholds that trigger Group H classification and control‑area design in § 307.1; corrosive (health‑hazard) materials are the primary example in § 307.6; and the CBC explicitly says that material‑specific design guidance is found in Sections 307 and 415 and in the California Mechanical and Fire Codes (§ 414.1.2).

Requirements in detail

High‑hazard classification (where to start)

The CBC defines High‑Hazard (Group H) occupancies and ties the classification to quantities that exceed the maximum allowable per control area in Tables 307.1(1) and 307.1(2) — so the first step is to compare your amounts to those tables; if quantities exceed those limits the occupancy may be Group H and subject to Group H construction and life‑safety provisions in § 307.1 and § 415.
Group H subgroups are by hazard type; health hazards (corrosives, toxic, highly toxic) are listed under Group H‑4 in § 307.6. If your material is corrosive, the H‑4 rules are the relevant CBC classification starting point.
The CBC tells you that the “safe design of hazardous material occupancies is material dependent” and that you must consult Sections 307 and 415 plus the California Mechanical Code and the California Fire Code for the detailed requirements on storage, ventilation, control areas and fire protection (§ 414.1.2).

Quantities and decision thresholds (short, decision‑relevant table)

Decision item	Typical decision threshold / value	Code reference
Does a corrosive storage/ use trigger Group H?	Compare to Table 307.1(2) maximum allowable quantity per control area — e.g., corrosive liquids: 500 gallons (storage); corrosive gases: 810 cu ft at NTP (example entries from the Table).	CBC § 307.1 and Table 307.1(2) (see § 307.1)
Is compressed gas design found in CBC?	CBC uses the Group H/ control‑area scheme; the CBC directs you to the Fire Code and NFPA standards for container, storage and handling details.	CBC § 414.1.2 (material rules are in Sections 307/415 and the Fire/Mechanical Codes)
Permit thresholds (example — Fire Code operational permits)	Compressed gases / corrosives: operational permit amounts appear in the California Fire Code (e.g., Table 105.5.9 for compressed gases and corrosives); cryogenic fluids appear in Table 105.5.11 (gallons) for permit triggers.	CBC directs to Fire Code; see the Fire Code tables (Cal Fire Code Ch. 1 / §§ 105.5.x)
Sprinkler effect on allowed quantities	Maximum allowable quantities in the CBC/Tables are increased where the building is sprinklered (100% increase per notes to the tables).	CBC table notes and explanatory text (apply to Tables 307.1/414.2)

(Notes: the CBC tables use material categories and different columns for storage, closed‑system use and open‑system use. Always read the applicable table footnotes and the CBC’s direction to the Fire Code for container and storage details.)

How the CBC fits with the Fire and Mechanical Codes

The CBC sets classification, quantities and control‑area requirements (Tables 307.1(1)/(2) and § 307.1); for the technical rules for compressed gas cylinders, cryogenic vessel construction, pressure relief, ventilation, secondary containment, and labeling the CBC points you to the Fire Code, NFPA standards and the California Mechanical Code (see § 414.1.2).
Example: compressed gases are regulated in the California Fire Code Chapter 53 (storage/use/handling) and cryogenic fluids in Fire Code Chapter 55; the CBC does not repeat container construction and pressure‑vessel details — it prescribes classification and where those material rules are applied.

Exceptions & special cases

Exemptions listed in Table 307.1.1 (CBC) are not required to comply with § 414 (hazardous materials provisions). If your use falls under the Table 307.1.1 exemptions, you will not be subject to § 414 control‑area rules. (See the “Exception: Exemptions listed in Table 307.1.1” in § 414.1.)
Sprinklered buildings: CBC table notes allow an increase (commonly 100%) in maximum allowable quantities when the building is protected by an approved automatic sprinkler system — check the table footnotes and apply cumulative increases correctly.
Outdoor storage or storage in approved cabinets may get different allowances — consult the CBC table footnotes and the Fire Code for cabinet standards and outdoor allowances. The CBC tables and notes explicitly address outdoor control areas and approved storage cabinets.
Mixed hazards: if a space contains materials that fall into multiple H‑groups (for example flammables and corrosives), the building must comply with the CBC requirements for each applicable Group H classification. The CBC/Fire Code require applying all relevant controls.

Common mistakes

Reading permit thresholds (Fire Code) as the CBC classification trigger. Permits are administrative; the CBC classification and control‑area quantities (Tables 307.1(1)/(2)) are the starting point for design and construction. Always check both.
Ignoring table footnotes: many increases or exceptions (sprinklers, outdoor areas, original sealed packages) are footnoted and change allowable quantities — overlooking them is a frequent error.
Confusing state and local adoptions: the CBC directs to the Fire Code and NFPA standards but local jurisdictions may have enforcement practices — always confirm with the AHJ and use the CBC tables as your compliance baseline.
Unit mistakes: CBC tables mix pounds, gallons and cubic feet at NTP. Convert carefully and use the table column that matches your storage/use condition (storage vs closed system vs open system).

Worked example — lab storing muriatic (hydrochloric) acid

Scenario: A lab plans to store 300 gallons of hydrochloric acid (a corrosive liquid) inside a single control area.

Step 1 — Classification check

Table 307.1(2) shows the CBC maximum allowable quantity per control area for corrosive liquids in storage is 500 gallons (the table entries for corrosives list 5,000 lb / 500 gal for storage as an example). Compare 300 gal to 500 gal: 300 gal ≤ 500 gal, so storage at 300 gallons would not, by itself, force Group H‑4 classification on the building under CBC § 307.1.

Step 2 — Check other rules the CBC points to

CBC § 414.1.2 says material‑specific design is in Sections 307/415 and the Mechanical/Fire Codes — so you must still apply Fire Code and Mechanical Code requirements for storage cabinets, secondary containment, ventilation and spill control. For example, a sprinklered building or approved storage cabinets could change allowed quantities; consult the table footnotes.

Step 3 — Permits and Fire Code thresholds

Even if the CBC quantity does not force Group H classification, the Fire Code may require an operational permit depending on the local thresholds or other characteristics of the material; check the Fire Code permit tables (e.g., Table 105.5.9/105.5.11).

Bottom line for this scenario: Under CBC Tables and § 307.1 a 300‑gallon stored corrosive is within the 500‑gallon control‑area allowance and would not alone mandate Group H‑4 classification — but you still must comply with the CBC § 414 direction to apply the Fire and Mechanical Code requirements (ventilation, cabinets, secondary containment, permits), and check AHJ practices.

Related provisions (quick reference)

§ 307.1 — High‑hazard Group H classification and dependence on Tables 307.1(1)/(2) (CBC).
§ 307.6 — Group H‑4 (health hazards: corrosives, highly toxic, toxic) (CBC).
§ 414.1.2 — CBC direction: “Materials — individual material requirements are found in Sections 307 and 415, the California Mechanical Code and the California Fire Code.”
Section 415 (Group H detailed provisions; construction, separation, systems) — see CBC Chapter 4 cross‑references.
CBC Tables 307.1(1) / 307.1(2) — maximum allowable quantities per control area (corrosives and other categories).
California Fire Code Chapter 53 — Compressed gases (detailed storage/use/labeling/permits).
California Fire Code Chapter 55 — Cryogenic fluids (container requirements, pressure relief, handling; CBC points you to this chapter).

Code references

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

CBC § 5301.1 High relevance — show source text
SECTION 5301—GENERAL

5301.1 Scope. Storage, use and handling of compressed gases in compressed gas containers, cylinders, tanks and systems shall comply with this chapter and NFPA 55, including those gases regulated elsewhere in this code. Partially full compressed gas containers, cylinders or tanks containing residual gases shall be considered as full for the purposes of the controls required.

Liquefied natural gas for use as a vehicular fuel shall also comply with NFPA 52 and NFPA 59A.

Compressed gases classified as hazardous materials shall also comply with Chapter 50 for general requirements and chapters addressing specific hazards, including Chapters 58 (Flammable Gases and Flammable Cryogenic Fluids), 60 (Highly Toxic and Toxic Materials), 63 (Oxidizers, Oxidizing Gases and Oxidizing Cryogenic Fluids) and 64 (Pyrophoric Materials).

Compressed hydrogen (CH 2 ) shall also comply with the applicable portions of Chapters 23 and 58 of this code, the International Fuel Gas Code and NFPA 2.

Cutting and welding gases shall also comply with Chapter 35.

Exceptions:
1. Gases used as refrigerants in refrigeration systems (see Section 608).
2. Compressed natural gas (CNG) for use as a vehicular fuel shall comply with Chapter 23, the International Fuel Gas Code and NFPA 52.
3. Cryogenic fluids shall comply with Chapter 55.
4. LP-gas shall comply with Chapter 61 and the International Fuel Gas Code .
[California Code of Regulations, Title 19, Division 1, §3.18(a) and (b)] Hazardous Areas.

(a) General. Occupancies or portions thereof used or intended to be used as operating rooms, surgeries, delivery rooms, storage rooms and similar hazardous locations in which flammable or nonflammable mixtures of gases are used or stored shall be main- tained in accordance with the provisions of NFPA 99-2005 Inhalation Anesthetics, NFPA 99-2005 Laboratories, NFPA 99-2005 Hyperbaric Facilities, NFPA 55-2010 Bulk Oxygen Systems at Consumer Sites, and this section.

(b) Containers. Cylinders and fittings for compressed gases shall conform to the regulations of the Federal Department of Transportation.

Compressed gas cylinders shall be clearly marked with the name of the gas contained therein. Cylinders shall bear color makings and labels conforming to the following:

Gas Color

(1) Oxygen..................................................................Green

(2) Carbon Dioxide....................................................... Gray

(3) Nitrous Oxide.................................................Light Blue

(4) Cyclopropan...................................................... Orange

(5) Helium .................................................................Brown

(6) Ethlene......................................................................Red

(7) Carbon Dioxide and Oxygen................Gray and Green

(8) Helium and Oxygen ..........................Brown and Green

Note: Polished metal or chrome-plated cylinders shall have color tags in addition to color labels.

When deemed necessary by the enforcing agency, compressed gas cylinders shall be secured by chains, metal straps or other approved materials to prevent overturning.

5301.2 Permits. Permits shall be required as set forth in Section 105.5.

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COMPRESSED GASES
CBC § 51-4 High relevance — show source text
5104 Inside Storage of Aerosol Products . . . . . . . . . . . . . 51-4 5105 Outside Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51-7 5106 Retail Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51-7 5107 Manufacturing Facilities . . . . . . . . . . . . . . . . . . . . . . . 51-9

CHAPTER 52 RESERVED . . . . . . . . . . . . . . . . . . . . . . . . . . . 52-1

CHAPTER 53 COMPRESSED GASES . . . . . . . . . . . . . . . . . . 53-3

5301 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53-3

5302 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53-4

5303 General Requirements. . . . . . . . . . . . . . . . . . . . . . . . . 53-4 5304 Storage of Compressed Gases. . . . . . . . . . . . . . . . . . 53-7 5305 Use and Handling of Compressed Gases. . . . . . . . . 53-7

5306 Medical Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53-8

5307 Compressed Gases Not Otherwise Regulated . . . . 53-9

CHAPTER 54 CORROSIVE MATERIALS. . . . . . . . . . . . . . . . 54-3

5401 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

5402 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

5403 General Requirements. . . . . . . . . . . . . . . . . . . . . . . . . 54-3 5404 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

5405 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

CHAPTER 55 CRYOGENIC FLUIDS . . . . . . . . . . . . . . . . . . . 55-3

5501 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-3
CFC § 2025 High relevance — show source text
Chapter 50 Hazardous Materials—General Provisions

Chapter 50 contains the general requirements for all hazardous chemicals in all occupancies. The general provisions of this chapter are intended to be companion provisions with the specific requirements of Chapters 51 through 67 regarding a given classification of hazardous material.

Chapter 51 Aerosols

Chapter 51 addresses the prevention, control and extinguishment of fires and explosions in facilities where retail aerosol products are displayed or stored. Requirements for storing aerosol products are dependent on the level of aerosol product, level of sprinkler protection, type of storage condition and quantity of aerosol products.

Chapter 52 Reserved for future use.

Chapter 53 Compressed Gases

Chapter 53 regulates the storage, use and handling of all flammable and nonflammable compressed gases, such as those that are used in medical facilities, air separation plants, industrial plants, agricultural equipment facilities and in systems such as carbon dioxide beverage dispensing and carbon dioxide enrichment. Where classified as a hazardous material, Chapter 50 would apply along with specific applications such as those used in welding and cutting (Chapter 35), cryogenic liquids (Chapter 55) and liquefied petroleum gases (Chapter 61).

Chapter 54 Corrosive Materials

Chapter 54 addresses materials whose primary hazard is corrosivity; that is, the ability to destroy or irreparably damage living tissue on contact. Although corrosive gases exist, most corrosive materials are solid or liquid and classified as either acids or bases (alkalis). These materials may pose a wide range of hazards other than corrosivity, such as combustibility, reactivity or oxidizing hazards, and must conform to the requirements of this code with respect to all known hazards.

Chapter 55 Cryogenic Fluids

Chapter 55 regulates the hazards associated with the storage, use and handling of cryogenic fluids through regulation of such things as pressure relief mechanisms and proper container storage. These hazards are in addition to the code requirements that address the other hazards of cryogenic fluids, such as flammability and toxicity (Chapters 50, 58 and 60).

Chapter 56 Explosives and Fireworks

Chapter 56 prescribes minimum requirements for the safe manufacture, storage, handling and use of explosives, ammunition and blasting agents for commercial and industrial occupancies. These provisions are intended to protect the general public, emergency responders and individuals who handle explosives. Chapter 56 also regulates the manufacturing, retail sale, display and wholesale distribution of fireworks.

Chapter 57 Flammable and Combustible Liquids

The requirements of Chapter 57 are intended to reduce the likelihood of fires involving the storage, handling, use or transportation of flammable and combustible liquids. The danger associated with flammable and combustible liquids is that the vapors from these liquids, when combined with air in their flammable range, will burn or explode at temperatures near normal living and working environment.

Chapter 58 Flammable Gases and Flammable Cryogenic Fluids

Chapter 58 sets requirements for the storage and use of flammable gases. For safety purposes, there is a limit on the quantities of flammable gas allowed per control area. Exceeding these limitations increases the possibility of damage to both property and indi

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CBC § 1.11. High relevance — show source text
- 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. The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
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53 COMPRESSED GASES

User notes:

About this chapter: Chapter 53 regulates the storage, use and handling of all flammable and nonflammable compressed gases, such as those that are used in medical facilities, air separation plants, industrial plants, agricultural equipment and similar occupancies. Also, this chapter regulates inert gases, such as CO 2 used for enrichment and beverage dispensing, that although inert are considered asphyxiants and in larger amounts pose a life safety hazard. Standards for the design, construction and marking of compressed gas cylinders and pressure vessels are referenced. Compressed gases used in welding and cutting, cryogenic liquids and liquefied petroleum gases are also regulated under Chapters 35, 55 and 61, respectively. Compressed gases that are classified as hazardous materials are also regulated in Chapter 50, which includes general requirements.

SECTION 5301—GENERAL

5301.1 Scope. Storage, use and handling of compressed gases in compressed gas containers, cylinders, tanks and systems shall comply with this chapter and NFPA 55, including those gases regulated elsewhere in this code. Partially full compressed gas containers, cylinders or tanks containing residual gases shall be considered as full for the purposes of the controls required.

Liquefied natural gas for use as a vehicular fuel shall also comply with NFPA 52 and NFPA 59A.

Compressed gases classified as hazardous materials shall also comply with Chapter 50 for general requirements and chapters addressing specific hazards, including Chapters 58 (Flammable Gases and Flammable Cryogenic Fluids), 60 (Highly Toxic and Toxic Materials), 63 (Oxidizers, Oxidizing Gases and Oxidizing Cryogenic Fluids) and 64 (Pyrophoric Materials).

Compressed hydrogen (CH 2 ) shall also comply with the applicable portions of Chapters 23 and 58 of this code, the International Fuel Gas Code and NFPA 2.

Cutting and welding gases shall also comply with Chapter 35.

Exceptions:
1. Gases used as refrigerants in refrigeration systems (see Section 608).
2. Compressed natural gas (CNG) for use as a vehicular fuel shall comply with Chapter 23, the International Fuel Gas Code and NFPA 52.
3. Cryogenic fluids shall comply with Chapter 55.
4. LP-gas shall comply with Chapter 61 and the International Fuel Gas Code .
[California Code of Regulations, Title 19, Division 1, §3.18(a) and (b)] Hazardous Areas.
CBC § 5801.1 High relevance — show source text
User notes:

About this chapter: Chapter 58 sets requirements for the storage and use of flammable gases. For safety purposes, there is a limit on the quantities of flammable gas allowed per control area. Exceeding these limitations increases the possibility of damage to both property and individuals. The principal hazard posed by flammable gas is its ready ignitability, or even explosivity, when mixed with air in the proper proportions. Consequently, occupancies storing or handling large quantities of flammable gas are classified as Group H-2 (high hazard) by the California Building Code .

SECTION 5801—GENERAL

5801.1 Scope. The storage and use of flammable gases and flammable cryogenic fluids shall be in accordance with this chapter, NFPA 2 and NFPA 55. Compressed gases shall also comply with Chapter 53 and cryogenic fluids shall also comply with Chapter 55. Flammable cryogenic fluids shall comply with Section 5806. Hydrogen motor fuel-dispensing stations and repair garages and their associated above-ground hydrogen storage systems shall also be designed, constructed and maintained in accordance with Chapter 23. Mobile fueling of hydrogen-fueled vehicles shall comply with Section 5809.

Exceptions:
1. Gases used as refrigerants in refrigeration systems (see Section 608).
2. Liquefied petroleum gases and natural gases regulated by Chapter 61.
3. Fuel-gas systems and appliances regulated under the California Mechanical Code and the California Plumbing Code other than gaseous hydrogen systems and appliances.
4. Pyrophoric gases in accordance with Chapter 64.
5801.2 Permits. Permits shall be required as set forth in Section 105.5.

SECTION 5802—DEFINITIONS

5802.1 Definitions. The following terms are defined in Chapter 2:

FLAMMABLE GAS.

FLAMMABLE LIQUEFIED GAS.

GAS DETECTION SYSTEM.

GASEOUS HYDROGEN SYSTEM.

HYDROGEN FUEL GAS ROOM.

METAL HYDRIDE.

METAL HYDRIDE STORAGE SYSTEM.

SECTION 5803—GENERAL REQUIREMENTS

5803.1 Quantities not exceeding the maximum allowable quantity per control area. The storage and use of flammable gases in amounts not exceeding the maximum allowable quantity per control area indicated in Section 5003.1 shall be in accordance with Sections 5001, 5003, 5801 and 5803.

5803.1.1 Special limitations for indoor storage and use. Flammable gases shall not be stored or used in Group A, E, I or R occupancies or in offices in Group B occupancies.

Exceptions:
1. Cylinders of nonliquefied compressed gases not exceeding a capacity of 250 cubic feet (7.08 m [3] ) or liquefied gases not exceeding a capacity of 40 pounds (18 kg) each at normal temperature and pressure (NTP) used for maintenance purposes, patient care or operation of equipment.
2. Food service operations in accordance with Section 6103.2.1.7.
3. Hydrogen gas systems located in a hydrogen fuel gas room constructed in accordance with Section 421 of the Califor- nia Building Code .
5803.1.1.1 Medical gases. Medical gas system supply cylinders shall be located in medical gas storage rooms or gas cabinets as set forth in Section 5306.
CBC § 3.1 High relevance — show source text
3.1|||X||||||||||||||||||||| |5809.3.2|||X||||||||||||||||||||| |5809.3.3|||X||||||||||||||||||||| |5809.4|||X||||||||||||||||||||| |5809.4.1 – 5803.4.2|||X||||||||||||||||||||| |5809.5.1|||X||||||||||||||||||||| |5809.5.1.1|||X||||||||||||||||||||| |5809.5.1.2|||X||||||||||||||||||||| |5809.6.1.2|||X||||||||||||||||||||| |5809.6.3|||X||||||||||||||||||||| |5809.6.5.1|||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. The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
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58 FLAMMABLE GASES AND FLAMMABLE CRYOGENIC FLUIDS

User notes:

About this chapter: Chapter 58 sets requirements for the storage and use of flammable gases. For safety purposes, there is a limit on the quantities of flammable gas allowed per control area. Exceeding these limitations increases the possibility of damage to both property and individuals. The principal hazard posed by flammable gas is its ready ignitability, or even explosivity, when mixed with air in the proper proportions. Consequently, occupancies storing or handling large quantities of flammable gas are classified as Group H-2 (high hazard) by the California Building Code .

SECTION 5801—GENERAL

5801.1 Scope. The storage and use of flammable gases and flammable cryogenic fluids shall be in accordance with this chapter, NFPA 2 and NFPA 55. Compressed gases shall also comply with Chapter 53 and cryogenic fluids shall also comply with Chapter 55. Flammable cryogenic fluids shall comply with Section 5806. Hydrogen motor fuel-dispensing stations and repair garages and their associated above-ground hydrogen storage systems shall also be designed, constructed and maintained in accordance with Chapter 23. Mobile fueling of hydrogen-fueled vehicles shall comply with Section 5809.

Exceptions:
1. Gases used as refrigerants in refrigeration systems (see Section 608).
2. Liquefied petroleum gases and natural gases regulated by Chapter 61.
3. Fuel-gas systems and appliances regulated under the California Mechanical Code and the California Plumbing Code other than gaseous hydrogen systems and appliances.
4. Pyrophoric gases in accordance with Chapter 64.
5801.2 Permits. Permits shall be required as set forth in Section 105.5.
CFC § 2025 High relevance — show source text
Chapter 55 Cryogenic Fluids

Chapter 55 regulates the hazards associated with the storage, use and handling of cryogenic fluids through regulation of such things as pressure relief mechanisms and proper container storage. These hazards are in addition to the code requirements that address the other hazards of cryogenic fluids, such as flammability and toxicity (Chapters 50, 58 and 60).

Chapter 56 Explosives and Fireworks

Chapter 56 prescribes minimum requirements for the safe manufacture, storage, handling and use of explosives, ammunition and blasting agents for commercial and industrial occupancies. These provisions are intended to protect the general public, emergency responders and individuals who handle explosives. Chapter 56 also regulates the manufacturing, retail sale, display and wholesale distribution of fireworks.

Chapter 57 Flammable and Combustible Liquids

The requirements of Chapter 57 are intended to reduce the likelihood of fires involving the storage, handling, use or transportation of flammable and combustible liquids. The danger associated with flammable and combustible liquids is that the vapors from these liquids, when combined with air in their flammable range, will burn or explode at temperatures near normal living and working environment.

Chapter 58 Flammable Gases and Flammable Cryogenic Fluids

Chapter 58 sets requirements for the storage and use of flammable gases. For safety purposes, there is a limit on the quantities of flammable gas allowed per control area. Exceeding these limitations increases the possibility of damage to both property and indi

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viduals. The principal hazard posed by flammable gas is its ready ignitability, or even explosivity, when mixed with air in the proper proportions. Consequently, occupancies storing or handling large quantities of flammable gas are classified as Group H- 2 (high hazard) by the CBC.

Chapter 59 Flammable Solids

Chapter 59 addresses general requirements for storage and handling of flammable solids, especially magnesium; however, it is important to note that several other solid materials, primarily metals, can be explosion hazards under the right conditions. Some of these metals are almost exclusively laboratory materials but because of where they are used, fire service personnel must be trained to handle emergency situations.

Chapter 60 Highly Toxic and Toxic Materials

The main purpose of Chapter 60 is to protect occupants, emergency responders and those in the immediate area of the building and facility from short-term, acute hazards associated with a release or general exposure to toxic and highly toxic materials. This chapter deals with all three states of toxic and highly toxic materials: solids, liquids and gases. This code does not address long-term exposure effects of these materials, which are addressed by agencies such as the Environmental Protection Agency (EPA) and Occupational Safety and Health Administration (OSHA).

Chapter 61 Liquefied Petroleum Gases

Chapter 61 establishes requirements for the safe handling, storing and use of LP-gas to reduce the possibility of damage to containers, accidental releases of LP-gas and exposure of flammable concentrations of LP-gas to ignition sources. LP-gas (notably propane) is well known as a camping fuel for cooking, lighting, heating and refrigerating and also remains a popular standby fuel supply for auxiliary generators as well as being widely used as an alternative motor vehicle fuel.

Chapter 62 Organic Peroxides

CBC § 105.5.8 High relevance — show source text

105.5.8 Combustible fibers. An operational permit is required for the storage and handling of combustible fibers in quantities greater than 100 cubic feet (2.8 m [3] ).

Exception: A permit is not required for agricultural storage.

105.5.9 Compressed gases. An operational permit is required for the storage, use or handling at normal temperature and pressure (NTP) of compressed gases in excess of the amounts listed in Table 105.5.9.

Exception: Vehicles equipped for and using compressed gas as a fuel for propelling the vehicle.

TABLE 105.5.9—PERMIT AMOUNTS FOR COMPRESSED GASES	Col2
TYPE OF GAS	AMOUNT (cubic feet at NTP)
Carbon dioxide used in carbon dioxide enrichment systems	875 (100 lb)
Carbon dioxide used in insulated liquid carbon dioxide beverage dispensing applications	875 (100 lb)
Corrosive	200
Flammable (except cryogenic fluids and liquefied petroleum gases)	200
Highly toxic	Any Amount
Inert and simple asphyxiant	6,000
Oxidizing (including oxygen)	504
Pyrophoric	Any Amount
Toxic	Any Amount
For SI: 1 cubic foot = 0.02832 m3.	For SI: 1 cubic foot = 0.02832 m3.

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DIVISION II—SCOPE AND ADMINISTRATION

105.5.10 Covered and open mall buildings. An operational permit is required for:

The placement of retail fixtures and displays, concession equipment, displays of highly combustible goods and similar items in the mall.
The display of liquid- or gas-fired equipment in the mall.
The use of open-flame or flame-producing equipment in the mall.

105.5.11 Cryogenic fluids. An operational permit is required to produce, store, transport on site, use, handle or dispense cryogenic fluids in excess of the amounts listed in Table 105.5.11.

Exception: Permits are not required for vehicles equipped for and using cryogenic fluids as a fuel for propelling the vehicle or for refrigerating the lading.

TABLE 105.5.11—PERMIT AMOUNTS FOR CRYOGENIC FLUIDS	Col2	Col3
TYPE OF CRYOGENIC FLUID	INSIDE BUILDING (gallons)	OUTSIDE BUILDING (gallons)
Flammable	More than 1	60
Inert	60	500
Oxidizing (includes oxygen)	10	50
Physical or health hazard not indicated above	Any Amount	Any Amount
For SI: 1 gallon = 3.785 L.	For SI: 1 gallon = 3.785 L.	For SI: 1 gallon = 3.785 L.

105.5.12 Cutting and welding. An operational permit is required to conduct cutting or welding operations within the jurisdiction.

105.5.13 Dry cleaning. An operational permit is required to engage in the business of dry cleaning or to change to a more hazardous cleaning solvent used in existing dry cleaning equipment.

CBC § 53-8 High relevance — show source text
5306 Medical Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53-8

5307 Compressed Gases Not Otherwise Regulated . . . . 53-9

CHAPTER 54 CORROSIVE MATERIALS. . . . . . . . . . . . . . . . 54-3

5401 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

5402 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

5403 General Requirements. . . . . . . . . . . . . . . . . . . . . . . . . 54-3 5404 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

5405 Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54-3

CHAPTER 55 CRYOGENIC FLUIDS . . . . . . . . . . . . . . . . . . . 55-3

5501 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-3

5502 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-3

5503 General Requirements. . . . . . . . . . . . . . . . . . . . . . . . . 55-3

5504 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-5 5505 Use and Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55-7

CHAPTER 56 EXPLOSIVES AND FIREWORKS . . . . . . . . . . 56-3

5601 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56-3

5602 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56-6

5603 Recordkeeping and Reporting. . . . . . . . . . . . . . . . . . 56-8 5604 Explosive Materials Storage and Handling . . . . . . . 56-8 5605 Manufacture, Assembly and Testing of Explosives, Explosive Materials and Fireworks. . . 56-15
CBC § 1319.0 Medium relevance — show source text
(4) Vacuum receiver.

(5) Piping between the vacuum pump(s), discharge(s), receiver(s), and vacuum source shutoff valve in accordance with Section 1319.0, except brass, galvanized, or black steel pipe, which is permitted to be used as recommended by the manufacturer.

(6) Except as defined in Section 1312.2(1) through Section 1312.2(5), materials and devices used between the medical vacuum exhaust and the medical vacuum source that are permitted to be of any design or construction appropriate for the service as determined by the manufacturer.

(7) Vacuum filtration per Section 1312.4. [NFPA 99:5.1.3.7.1.1]

1312.3 Vacuum Receivers. Receivers for vacuum shall meet the following requirements:

(1) They shall be made of materials deemed suitable by the manufacturer.

(2) They shall comply with Section VIII.1, “Unfired Pressure Vessels,” of the ASME Boiler and Pressure Vessel Code.

(3) They shall be capable of withstanding a gauge pressure of 60 psi (414 kPa) and 30 inch (762 mm) gauge HgV.

(4) They shall be equipped with a manual drain.

(5) They shall be of a capacity based on the technology of the pumps. [NFPA 99:5.1.3.7.3]

1312.4 Vacuum Filtration. Central supply systems for vacuum other than liquid ring pumps shall be provided with inlet filtration with the following characteristics:

(1) Filtration shall be at least duplex to allow one filter to be exchanged without impairing the vacuum system.

(2) Filtration shall be located on the patient side of the vacuum producer.

(3) Filters shall be efficient to 0.3 µ and 99.97 percent HEPA or better, per DOE-STD-3020.

(4) Filtration shall be sized for 100 percent of the peak calculated demand while one filter or filter bundle is iso lated.

(5) It shall be permitted to group multiple filters into bundles to achieve the required capacities.

(6) The system shall be provided with isolation valves on the source side of each filter or filter bundle and isolation valves on the patient side of each filter or filter bundle, permitting the filters to be isolated without shutting off flow to the central supply system.

(7) A means shall be available to allow the user to observe any accumulations of liquids.

2025 CALIFORNIA PLUMBING CODE 281

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS

(8) A vacuum relief petcock shall be provided to allow vacuum to be relieved in the filter canister during filter replacement.

(9) Filter elements and canisters shall be permitted to be constructed of materials as deemed suitable by the manufacturer.

(10)In normal operation, one filter or filter bundle shall be isolated from the system to be available for service should a blockage in the operating filter occur or rotation of the filters be desired after filter element exchange.

[NFPA 99:5.1.3.7.4] 1312.5 Piping Arrangement and Redundancies. Piping arrangement shall be as follows:

(1) Piping shall be arranged to allow service and a continuous supply of medical-surgical vacuum in the event of a single fault failure.
CBC § 13131.3. Medium relevance — show source text
[BG] PERSONAL CARE SERVICE. The care of persons who do not require medical care. Personal care involves responsibility for the safety of the persons while inside the building.

PERSONS WITH DISABILITIES. [HCD 1-AC] For purposes of Chapter 11A, “Persons with disabilities” includes, but is not limited to, any physical or mental disability as defined in Government Code Section 12926.

PERSONS WITH INTELLECTUAL DISABILITIES, PROFOUNDLY OR SEVERELY. Shall mean any persons with intellectual disabilities who is unable to evacuate a building unassisted during emergency conditions.

Note: The determination as to such incapacity shall be made by the Director of the State Department of Public Health or his or her designated representative pursuant to Health and Safety Code Section 13131.3.

[BE] PHOTOLUMINESCENT. Having the property of emitting light that continues for a length of time after excitation by visible or invisible light has been removed.

[BS] PHOTOVOLTAIC (PV) MODULE. A complete, environmentally protected unit consisting of solar cells, optics and other components, exclusive of tracker, designed to generate DC power when exposed to sunlight.

[BS] PHOTOVOLTAIC (PV) PANEL. A collection of modules mechanically fastened together, wired and designed to provide a fieldinstallable unit.

[BS] PHOTOVOLTAIC (PV) PANEL SYSTEM. A system that incorporates discrete photovoltaic panels, that converts solar radiation into electricity, including rack support systems.

[BS] PHOTOVOLTAIC (PV) PANEL SYSTEM, GROUND MOUNTED. An independent photovoltaic (PV) panel system without usable space underneath, installed directly on the ground.

[BS] PHOTOVOLTAIC (PV) SUPPORT STRUCTURE, ELEVATED. An independent photovoltaic (PV) panel support structure designed with usable space underneath with minimum clear height of 7 feet 6 inches (2286 mm), intended for secondary use such as providing shade or parking of motor vehicles.

[F] PHYSICAL HAZARD. A chemical for which there is evidence that it is a combustible liquid, cryogenic fluid, explosive, flammable (solid, liquid or gas), organic peroxide (solid or liquid), oxidizer (solid or liquid), oxidizing gas, pyrophoric (solid, liquid or gas), unstable (reactive) material (solid, liquid or gas) or water-reactive material (solid or liquid).

[F] PHYSIOLOGICAL WARNING THRESHOLD LEVEL. A concentration of airborne contaminants, normally expressed in parts per million (ppm) or milligrams per cubic meter (mg/m [3] ), that represents the concentration at which persons can sense the presence of the contaminant due to odor, irritation or other quick-acting physiological response. When used in conjunction with the permissible exposure limit (PEL) the physiological warning threshold levels are those consistent with the classification system used to establish the PEL. See the definition of “Permissible exposure limit (PEL)” in the California Fire Code .

PICTOGRAM. A pictorial symbol that represents activities, facilities or concepts.

_**PLACE OF PUBLIC ACCOMMODATION.

CBC § 2.875 Medium relevance — show source text

Table 9 Data and Material Codes for PVC Swedge Reducers [1]

Reducer Size (inches)	Dimensions (inches)	Col3	Col4	Col5	Material Code
Reducer Size (inches)	Minimum Length	Minimum Length	Typical Belled End ID	Typical Belled End ID	Typical Belled End ID
Reducer Size (inches)	A	B	C	D	D
3 x 2	2.875	1.750	3.515	2.393	018585
4 x 3	3.375	2.875	4.515	3.515	018584
5 x 4	4.000	3.375	5.593	4.515	360777
6 x 5	5.000	4.000	6.658	5.593	360778

1 � Both belled ends must be chamferred 0.3 inches (min) by 45 .

062288 Page 6 of 20 Rev. #20: 03−25−22

UG-1: Conduits Greenbook Underground Conduits

PVC and HDPE Conduit and Fittings (continue)

Table 10 High Density Polyethylene (HDPE) Conduit Directional

Figure 9 HDPE Conduit

Figure 10 PE Mechanical Coupling

Figure 11 PVC (Bore-Gard, Schedule 40

Table 10 High Density Polyethylene (HDPE) Condu Boring Conduit 1	Col2	Col3	Col4	uit Directional	Col6
Conduit	Conduit	Conduit	Conduit	Mechanical Couplings2, 3	Mechanical Couplings2, 3
Size	Length (feet)	Description	Material Code	Size (inches)	Material Code
2” Sch 80	500	Coil4	360511	2	360690
2” Sch 80	40	Stick	360017	360017	360017
3” Sch 80	500	Coil4	360644	3	360691
3” Sch 80	40	Stick	360018	360018	360018
4” Sch 80	625	Coil5	360014	4	360692
4” Sch 80	40	Stick	360015	360015	360015
5” SDR 13.5	450	Coil5	360012	5	360694
5” SDR 13.5	40	Stick	360013	360013	360013
6” SDR 13.5	450	Coil5	360010	6	360695
6” SDR 13.5	40	Stick	360011	360011	360011

1 Color must be black with at least 3 red longitudinal strips. 2 May be used to connect PE conduit to PVC conduit (except in directional drilling apps.) 3 Mechanical couplings are not designed for directional drilling. Fusion joints are required. 4 No reel. 5 With reel.

Table 11 PVC (Bore-Gard) Directional Boring Conduit

CBC § 2506.2 Medium relevance — show source text
Vertical and horizontal assemblies

2504

Wallboard Table 2506.2, 2508.2, 2508.2.1, 2508.4, 2510.5.2.1 Water-resistant backing board 2506.2, 2509.2

Habitable Space 1208 Handrails 1014 Alternating tread devices 1011.14 Assembly aisles 1030.16 Construction 1014.5, 1014.6, 1014.7 Extensions 1014.7 Glazing 2407 Graspability 1014.4 Guards 1015.3 Height 1014.2 Loads 1607.9

Location 1014.1, 1014.8, 1014.9,

1014.10

Ramps 1012.8 Stairs 1011.11

Hardboard 1403.3.2, 2303.1.7 Hardware (see Doors and Locks and Latching) Hardwood

Fastening 2304.10 Quality 2303.3 Veneer 1403.3.2 Hazardous Materials 307, 414, 415 Compliance with California Fire Code 307.2

Control areas 414.2

Explosion control 414.5.1, Table 414.5.1, 415.11.6.5, 426.1.4 Mercantile occupancies 309.2 Reporting 414.1.3 Sprinkler protection Table 414.2.5.1, Table 414.2.5.2, 415.4, 415.11.12,

903.2.5

Ventilation 414.3, 415.9.1.7, 415.11.1.6, 415.11.1.8.1, 415.11.3.2, 415.11.6.8, 415.11.7.4, 415.11.8, 415.11.11, 1202.6 Weather protection 414.6.1 Hazardous Occupancy (Group H), (see Hazardous Materials) 307, 414, 415 Alarms and detection 415.11.2, 415.11.4, 415.11.6.9, 415.11.8, 415.3, 415.5, 907.2.5, 908.1, 908.2 Area 503, 505, 506, 507, 508 Dispersing 414.5, 414.6, 415.6 Gas detection systems 415.11.7 Group provisions H-1 (detonation) 307.3, 415.6.2, 415.7, 415.6.4.1, 415.7.1 H-2 (deflagration) 307.4, 415.8, 415.9 H-3 (physical hazard) 415.10, 307.5, 415.8 H-4 (health hazard) 307.6, 415.10 H-5 (semiconductor) 307.7, 415.11 Height 415.7, 415.8.1, 415.9.1.1, 426.1.1, 503, 504, 505, 506 Incidental uses 509
CBC § 414.1 Medium relevance — show source text
Exception: Neither fire-resistance-rated construction nor opening protectives are required in any of the following locations:
1. Areas protected by approved automatic sprinkler systems.
2. Group R-3 and U occupancies.
SECTION 414—HAZARDOUS MATERIALS

[F] 414.1 General. Buildings and structures occupied for the manufacturing, processing, dispensing, use or storage of hazardous materials shall comply with Sections 414.1 through 414.6.

Exception: Exemptions listed in Table 307.1.1 shall not be required to comply with Section 414.

[F] 414.1.1 Other provisions. Buildings and structures with an occupancy in Group H shall comply with this section and the applicable provisions of Section 415 and the California Fire Code. See Section 453 for Group L occupancies.

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SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY AND USE

[F] 414.1.2 Materials. The safe design of hazardous material occupancies is material dependent. Individual material requirements are found in Sections 307 and 415, the California Mechanical Cod e and the California Fire Code.

[F] 414.1.2.1 Aerosol products, aerosol cooking spray products and plastic aerosol 3 products. Level 2 and 3 aerosol products, aerosol cooking spray products and plastic aerosol 3 products shall be stored and displayed in accordance with the California Fire Code . See Section 311.2 and the California Fire Code for occupancy group requirements.

[F] 414.1.3 Information required. A report shall be submitted to the building official identifying the maximum expected quantities of hazardous materials to be stored, used in a closed system and used in an open system, and subdivided to separately address hazardous material classification categories based on Tables 307.1(1) and 307.1(2). The methods of protection from such hazards, including but not limited to control areas, fire protection systems and Group H occupancies shall be indicated in the report and on the construction documents. The opinion and report shall be prepared by a qualified person, firm or corporation approved by the building official and provided without charge to the enforcing agency.

For buildings and structures with an occupancy in Group H, separate floor plans shall be submitted identifying the locations of anticipated contents and processes so as to reflect the nature of each occupied portion of every building and structure.

[F] 414.2 Control areas. Control areas shall comply with Sections 414.2.1 through 414.2.5 and the California Fire Code .

[F] 414.2.1 Construction requirements. Control areas shall be separated from each other by fire barriers constructed in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both.

[F] 414.2.2 Percentage of maximum allowable quantities. The percentage of maximum allowable quantities of hazardous materials per control area permitted at each floor level within a building shall be in accordance with Table 414.2.2.
CBC § 412.7.3 Medium relevance — show source text
[BE] 412.7.3 Means of egress. The means of egress from heliports and helistops shall comply with the provisions of Chapter 10. Landing areas located on buildings or structures shall have two or more exits or access to exits. For landing areas less than 60 feet (18 288 mm) in length or less than 2,000 square feet (186 m [2] ) in area, the second means of egress is permitted to be a fire escape, alternating tread device or ladder leading to the floor below.

[F] 412.7.4 Rooftop heliports and helistops. Rooftop heliports and helistops shall comply with NFPA 418.

[F] 412.7.5 Standpipe system. In buildings equipped with a standpipe system, the standpipe shall extend to the roof level in accordance with Section 905.3.5.

SECTION 413—COMBUSTIBLE STORAGE

413.1 General. High-piled stock or rack storage in any occupancy group shall comply with the California Fire Code .

413.2 Attic, under-floor and concealed spaces. Attic, under-floor and concealed spaces used for storage of combustible materials shall be protected on the storage side as required for 1-hour fire-resistance-rated construction. Openings shall be protected by assemblies that are self-closing and are of noncombustible construction or solid wood core not less than 1 [3] / 4 inches (45 mm) in thickness.

Exception: Neither fire-resistance-rated construction nor opening protectives are required in any of the following locations:
1. Areas protected by approved automatic sprinkler systems.
2. Group R-3 and U occupancies.
SECTION 414—HAZARDOUS MATERIALS

[F] 414.1 General. Buildings and structures occupied for the manufacturing, processing, dispensing, use or storage of hazardous materials shall comply with Sections 414.1 through 414.6.

Exception: Exemptions listed in Table 307.1.1 shall not be required to comply with Section 414.

[F] 414.1.1 Other provisions. Buildings and structures with an occupancy in Group H shall comply with this section and the applicable provisions of Section 415 and the California Fire Code. See Section 453 for Group L occupancies.

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SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY AND USE

[F] 414.1.2 Materials. The safe design of hazardous material occupancies is material dependent. Individual material requirements are found in Sections 307 and 415, the California Mechanical Cod e and the California Fire Code.

[F] 414.1.2.1 Aerosol products, aerosol cooking spray products and plastic aerosol 3 products. Level 2 and 3 aerosol products, aerosol cooking spray products and plastic aerosol 3 products shall be stored and displayed in accordance with the California Fire Code . See Section 311.2 and the California Fire Code for occupancy group requirements.
CBC § 100.0 Medium relevance — show source text
2025 CBC Building Code

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2025 California Building Code California Code of Regulations, Title 24, Volume 1 of Part 2

COPYRIGHT  2025

by INTERNATIONAL CODE COUNCIL, INC.

[DSA-AC] (916) 445-5827 DSAaccess@dgs.ca.gov Access for Persons with Disabilities

Structural Safety [DSA-SS, DSA-SS/CC]

Public Schools & Community Colleges, State Essential Services Buildings

State Historical Building Safety Board [SHBSB] (916) 445-7627 shbsb@dgs.ca.gov Historical Building Rehabilitation, Preservation, Restoration or Relocation

Energy Commission [CEC] energy.ca.gov Title24@energy.ca.gov (800) 772-3300 Building Energy Efficiency, Compliance Manual & Compliance Forms

Office of the State Fire Marshal [SFM]

osfm.fire.ca.gov codedevelopment@fire.ca.gov

(916) 568-3800 Fire & Life Safety

State Lands Commission [SLC]

slc.ca.gov MOTEMS.Public@slc.ca.gov (510) 741-4950 Marine Oil Terminals

State Librarian [SL]

library.ca.gov csllaw@library.ca.gov (916) 323-9843 Public Library Construction & Renovation

Structural Pest Control Board [CA] pestboard.ca.gov pestboard@dca.ca.gov (800) 737-8188 Structural Pest Control Locations

Veterinary Medical Board [CA] vmb.ca.gov vmb@dca.ca.gov (916) 515-5220 Veterinary Facilities

Department of Food and Agriculture [AGR] cdfa.ca.gov (916) 900-5004 Rendering & Collection Centers (916) 900-5064 Meat & Poultry Packing Plants (916) 900-5008 Milk & Dairy Food Safety

Department of Health Care Access and Information

Office of Statewide Hospital Planning and Development

[OSHPD 1, 1R, 2, 3, 4, 5, 6] hcai.ca.gov regsunit@hcai.ca.gov (916) 440-8300 Hospital Standards, Skilled Nursing Facility Standards & Clinic Standards

Department of Public Health [DPH]

cdph.ca.gov (Recreational Health) (916) 449-5661 Food Establishments, Organized Camps, Public Swimming Pools

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How to Distinguish Between Model Code Language and California Amendments

To distinguish between model code language and the incorporated California amendments, including exclusive California stan- dards, California amendments will appear in italics.
CBC § 4-30 Medium relevance — show source text
409 Motion Picture Projection Rooms . . . . . . . . . . . . . . . 4-30

410 Stages, Platforms and Technical Production Areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-31

411 Special Amusement Areas . . . . . . . . . . . . . . . . . . . . . . 4-32

412 Aircraft-Related Occupancies . . . . . . . . . . . . . . . . . . . 4-33

413 Combustible Storage . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37

414 Hazardous Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-37

415 Groups H-1, H-2, H-3, H-4 and H-5 . . . . . . . . . . . . . . . 4-42

416 Spray Application of Flammable Finishes . . . . . . . . 4-51

417 Drying Rooms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52

418 Organic Coatings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52

419 Artificial Decorative Vegetation . . . . . . . . . . . . . . . . . 4-52

420 Groups I-1, R-1, R-2, R-2.1, R-2.2, R-3, R-3.1 and

R-4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52

421 Hydrogen Fuel Gas Rooms. . . . . . . . . . . . . . . . . . . . . . 4-54

422 Ambulatory Care Facilities. . . . . . . . . . . . . . . . . . . . . . 4-54

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CONTENTS

423 Storm Shelters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-55

424 Play Structures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56

425 Hyperbaric Facilities. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56

426 Combustible Dusts, Grain Processing and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57

427 Medical Gas Systems . . . . . . . . . . . . . . . . . . . . . . . . . . 4-57

CBC § 2.1 Medium relevance — show source text

The IBC requirements for hazardous materials, fire-resistance-rated construction, interior finish, fire protection systems, means of egress, emergency and standby power, and temporary structures are directly correlated with the requirements of the International Fire Code ® (IFC®). The following table shows chapters/sections of the IBC that are correlated with the IFC:

IBC/IFC CORRELATED TOPICS	Col2	Col3
IBC CHAPTER/SECTION	IFC CHAPTER/SECTION	SUBJECT
Sections 307, 414, 415	Chapters 50–67	Hazardous materials and Group H requirements
Chapter 7	Chapter 7	Fire-resistance-rated construction (fire and smoke protection features in the IFC)
Chapter 8	Chapter 8	Interior finish, decorative materials and furnishings
Chapter 9	Chapter 9	Fire protection systems
Chapter 10	Chapter 10	Means of egress
Chapter 27	Section 604	Standby and emergency power
Section 3103	Chapter 31	Temporary structures

Chapter 1 Scope and Administration.

Chapter 1 establishes the limits of applicability of the code and describes how the code is to be applied and enforced. The provisions of Chapter 1 establish the authority and duties of the code official appointed by the authority having jurisdiction and also establish the rights and privileges of the design professional, contractor and property owner.

Chapter 2 Definitions.

Chapter 2 is the repository of the definitions of terms used in the body of the code. The user of the code should be familiar with and consult this chapter because the definitions are essential to the correct interpretation of the code and because the user may not be aware that a term is defined.

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Chapter 3 Occupancy Classification and Use.

Chapter 3 provides for the classification of buildings, structures and parts thereof based on the purpose for which they are used. Section 302 identifies the groups into which all buildings, structures and parts thereof must be classified. Sections 303 through 312 identify the occupancy characteristics of each group classification. In some sections, specific group classifications having requirements in common are collectively organized such that one term applies to all. For example, Groups A-1, A-2, A-3, A-4 and A-5 are individual groups for assembly-type buildings. The general term “Group A,” however, includes each of these individual groups. Other groups include Business (B), Organized Camps (C), Educational (E), Factory (F-1, F-2), High Hazard (H-1, H-2, H-3, H-4, H-5), Institutional (I-2, I-3, I-4), Laboratories (L), Mercantile (M), Residential (R-1, R-2, R-2.1, R-2.2, R-3, R-3.1, R-4), Storage (S-1, S-2) and Utility (U). In some occupancies, the smaller number means a higher hazard, but that is not always the case.

CBC § 1.1.10 Medium relevance — show source text
1.1.10 Availability of codes. At least one complete copy each of Titles 8, 19, 20, 24 and 25 with all revisions shall be maintained in the office of the building official responsible for the administration and enforcement of this code. Each state department concerned and each city, county, or city and county shall have an up-to-date copy of the code available for public inspection. See Health and Safety Code Section 18942(e)(1) and (2).

1.1.11 Format. This part fundamentally adopts the International Building Code by reference on a chapter-by-chapter basis. When a specific chapter of the International Building Code is not printed in the code and is marked “Reserved”, such chapter of the International Building Code is not adopted as a portion of this code. When a specific chapter of the International Building Code is marked “Not adopted by the State of California” but appears in the code, it may be available for adoption by local ordinance.

Note: Matrix Adoption Tables at the front of each chapter may aid the code user in determining which chapter or sections within a chapter are applicable to buildings under the authority of a specific state agency, but they are not to be considered regulatory.

1.1.12 Validity. If any chapter, section, subsection, sentence, clause or phrase of this code is for any reason held to be unconstitutional, contrary to statute, exceeding the authority of the state as stipulated by statutes or otherwise inoperative, such decision shall not affect the validity of the remaining portion of this code.

SECTION 1.2—BUILDING STANDARDS COMMISSION

1.2.1 BSC. Specific scope of application of the agency responsible for enforcement, the enforcement agency and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated. 1. State buildings for all occupancies.

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ADMINISTRATION

Application— State buildings (all occupancies), including buildings constructed by the Trustees of the California State University (CSU) and the Regents of the University of California (UC) where no state agency has the authority to adopt build- ing standards applicable to such buildings.

Enforcing agency— State or local agency specified by the applicable provisions of law.

Authority cited— Health and Safety Code Section 18934.5.

Reference— Health and Safety Code, Division 13, Part 2.5, commencing with Section 18901. 2. University of California, California State Universities and California Community Colleges.

Application— Standards for lighting for parking lots and primary campus walkways at the University of California, Califor- nia State Universities and California Community Colleges.

Enforcing agency— State or local agency specified by the applicable provisions of law.

Authority cited— Government Code Section 14617.

Reference— Government Code Section 14617.

3. Existing state-owned buildings, including those owned by the University of California and by the California State University.
CBC § 1.1.1 Medium relevance — show source text
1.1.1 Title. These regulations shall be known as the California Building Code, may be cited as such and will be referred to herein as “this code.” The California Building Code is Part 2 of thirteen parts of the official compilation and publication of the adoption, amendment and repeal of building regulations to the California Code of Regulations, Title 24, also referred to as the California Building Standards Code. This part incorporates by adoption the 2024 International Building Code of the International Code Council with necessary Califor- nia amendments.

1.1.2 Purpose. The purpose of this code is to establish the minimum requirements to safeguard the public health, safety and general welfare through structural strength, means of egress facilities, stability, access to persons with disabilities, sanitation, adequate lighting and ventilation and energy conservation; safety to life and property from fire and other hazards attributed to the built environment; and to provide safety to firefighters and emergency responders during emergency operations.

1.1.3 Scope. The provisions of this code shall apply to the construction, alteration, movement, enlargement, replacement, repair, equip- ment, use and occupancy, location, maintenance, removal and demolition of every building or structure or any appurtenances connected or attached to such buildings or structures throughout the State of California.

1.1.3.1 Nonstate-regulated buildings, structures and applications. Except as modified by local ordinance pursuant to Section 1.1.8, the following standards in the California Code of Regulations, Title 24, Parts 2, 2.5, 3, 4, 5, 6, 7, 9, 10 and 11 shall apply to all occupancies and applications not regulated by a state agency.

1.1.3.2 State-regulated buildings, structures and applications. The model code, state amendments to the model code and/or state amendments where there are no relevant model code provisions shall apply to the following buildings, structures and applica- tions regulated by state agencies as specified in Sections 1.2 through 1.14, except where modified by local ordinance pursuant to Section 1.1.8. When adopted by a state agency, the provisions of this code shall be enforced by the appropriate enforcing agency, but only to the extent of authority granted to such agency by the state legislature.

Note: See “How to Distinguish Between Model Code Language and California Amendments” in the front of the code. 1. State-owned buildings, including buildings constructed by the Trustees of the California State University, and to the extent permitted by California laws, buildings designed and constructed by the Regents of the University of California, and regulated by the Building Standards Commission. See Section 1.2 for additional scope provisions. 2. Local detention facilities regulated by the Board of State and Community Corrections. See Section 1.3 for additional scope provisions. 3. Barbering, cosmetology or electrolysis establishments, acupuncture offices, pharmacies, veterinary facilities and struc- tural pest control locations regulated by the Department of Consumer Affairs. See Section 1.4 for additional scope provisions. 4. Section 1.5 reserved for the California Energy Commission. 5. _Dairies and places of meat inspection regulated by the Department of Food and Agriculture.

CBC § 304.8 Medium relevance — show source text

corner
column
opening| |||||||||||||||||||||existing
top railing
existing hole in
corner casting
existing fork
lift pocket
existing
bottom railing
existing corner
column
opening| |||||||||||||||||||||| ||||||||||||||||||||||

L = length of wall

For SI: 1 foot = 304.8 mm.

Col1	≥ 8 ft. min
	≥ 8 ft. min

	existing vent existing top railing existing hole in corner casting existing fork lift pocket existing bottom railing existing corner column opening

For SI: 1 foot = 304.8 mm.

FIGURE 3114.8.5.3(3)—BRACING UNIT DISTRIBUTION—BOUNDARY ELEMENTS

boundary elements

Col1	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10	Col11	Col12	Col13	Col14	Col15	Col16	Col17	Col18	Col19	existing existing hole in top railing corner casting opening existing corner column existing fork existing lift pocket bottom railing

FIGURE 3114.8.5.3(4)—BRACING UNIT DISTRIBUTION—PENETRATION LIMITATIONS

L = length of wall

2025 CALIFORNIA BUILDING CODE 31-17

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SPECIAL CONSTRUCTION

3114.9 Additional requirements. [DSA-SS and DSA-SS/CC]

3114.9.1 General.

1. Intermodal shipping containers shall not have been manufactured earlier than 24 months from the date of DSA approval of the site-specific or stockpile building design drawings. 2. Intermodal shipping containers shall be undamaged and have no previous repairs. The acceptable tolerances shall not exceed those given in the ANSI/AISC 303—16: Code of Standard Practice for Steel Buildings and Bridges. 3. Intermodal shipping container type shall be standard dry cargo container, used for the transportation of dry goods only. Containers shall not have been used for transporting hazardous materials. Containers shall not have been painted with paint containing lead. 4. All structural elements and details shall be justified through engineering calculations in accordance with the California Administrative Code (Title 24, Part 1, CCR) Section 4-317(d).

3114.9.2 Structural integrity verification. Each intermodal shipping container shall have selection, structural integrity verification, general condition assessment, inspection and testing as enforced by the enforcement agency.

CBC § 1.10.3.1 Medium relevance — show source text
1.10.3.1 Applicable administrative standards. 1. Title 24, Part 1, California Code of Regulations: Chapter 7. 2. Title 24, Part 2, California Code of Regulations: Sections 1.1 and 1.10, Chapter 1, Division I, and as adopted in Chapter 1, Divi- sion II.

1.10.3.2 Applicable building standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10 and 11.

The provisions of Title 24, Part 2, as adopted and amended by OSHPD, shall apply to the applications listed in Section 1.10.3.

OSHPD 3 adopts the following building standards in Title 24, Part 2:

Chapter 12.

1.10.3.3 Identification of amendments. For applications listed in Section 1.10.3, amendments appear in this code without the acro- nym [OSHPD 3]. Adoptions are shown in the adoption matrix.

Authority— Health and Safety Code Sections 127010, 127015 and 1226.

References— Health and Safety Code Sections 127010, 127015, 129885 and 1226, Government Code Section 54350 and State Constitution Article 11, Section 7.

1.10.4 OSHPD 4. Specific scope of application of the agency responsible for enforcement, enforcement agency and the specific authority to adopt and enforce such provisions of this code, unless otherwise stated.

Application— Correctional treatment centers.

Enforcing agency— Health Care Access and Information/Office of Statewide Hospital Planning and Development (OSHPD). The office shall also enforce the California Energy Commission—Energy Regulations, the Division of the State Architect—Access Compliance regulations and the regulations of the Office of the State Fire Marshal for the above-stated facility types.

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ADMINISTRATION

1.10.4.1 Applicable administrative standards. 1. Title 24, Part 1, California Code of Regulations: Chapter 7. 2. Title 24, Part 2, California Code of Regulations: Sections 1.1 and 1.10, Chapter 1, Division I, and as adopted in Chapter 1, Division II.

1.10.4.2 Applicable building standards. California Building Standards Code, Title 24, Parts 2, 3, 4, 5, 6, 9, 10 and 11.

The provisions of Title 24, Part 2, as adopted and amended by OSHPD, shall apply to the applications listed in Section 1.10.4.

OSHPD 4 adopts the following building standards in Title 24, Part 2:

Chapters 2 through 10, 12, 14, 15, 16A, 17A, 18A, 19A, 20, 21A, 22A, 23, 24, 25, 26, 30, 31, 32, 33, 35 and Appendix L.
CBC § 903.2.5 Medium relevance — show source text
903.2.5

Ventilation 414.3, 415.9.1.7, 415.11.1.6, 415.11.1.8.1, 415.11.3.2, 415.11.6.8, 415.11.7.4, 415.11.8, 415.11.11, 1202.6 Weather protection 414.6.1 Hazardous Occupancy (Group H), (see Hazardous Materials) 307, 414, 415 Alarms and detection 415.11.2, 415.11.4, 415.11.6.9, 415.11.8, 415.3, 415.5, 907.2.5, 908.1, 908.2 Area 503, 505, 506, 507, 508 Dispersing 414.5, 414.6, 415.6 Gas detection systems 415.11.7 Group provisions H-1 (detonation) 307.3, 415.6.2, 415.7, 415.6.4.1, 415.7.1 H-2 (deflagration) 307.4, 415.8, 415.9 H-3 (physical hazard) 415.10, 307.5, 415.8 H-4 (health hazard) 307.6, 415.10 H-5 (semiconductor) 307.7, 415.11 Height 415.7, 415.8.1, 415.9.1.1, 426.1.1, 503, 504, 505, 506 Incidental uses 509

Interior finishes 416.2.1, 416.3.1, Table 803.13, 804 Live load Table 1607.1

Location on property 414.6.1.2, 415.6 Low hazard 306.3, 311.3 Means of egress Corridors 415.11.2 One means of egress Table 1006.3.4(1), Table 1006.3.4(2) Panic hardware 1006.2.2.2, 1006.2.2.3, 1006.2.2.4, 1010.2.8 Stairway, exit access 1019 Travel distance 1006.3, 1006.2.1, Table 1017.2

Mixed occupancies 508.3, 508.4 Accessory 508.2 Moderate hazard 306.2, 311.2 Multiple hazards 306.2, 311.2 Occupancy exceptions 307.1 Plumbing fixtures Chapter 29 Risk category Table 1604.5 Separation from other occupancies 415.6.1, 508.1, 508.2.4, 508.3.3, 508.4 Smoke and heat removal 910.2 Special provisions based on materials Combustible liquids Table 307.1(1), 307.4, 307.5, 414.2.5, 414.5.3,

415.9.2

Corrosives 307.6, Table 414.2.5.1, 414.3, 415.10.3, Table 415.11.1.1 Explosives 307.3, 307.3.1, Table 415.6.5
CBC § 2205.1 Medium relevance — show source text
Cold-Formed Steel 2204

Cold-formed Stainless Steel 2205.1 Cutting and notching 2206.3 Light-frame construction 2206 Special inspection 1705.12.2, 1705.13.3, 1705.2.3, 1705.2.7 Combustible Dusts 307.4, 414.5.1, 426.1 Combustible Liquids 307.1, 307.4, 307.5, 414.2.5, 414.5.3, 415.9.2, 415.10.1, 418.6

Combustible Material

Concealed spaces 413.2, 718.5 Exterior side of exterior wall 1405 High-pile stock or rack storage 413.1, 910.2.2 Type I and Type II 603, 805 Combustible Projections 705.2, 705.2.3.1 Combustible Storage 413, 910.2.2 Common Path of Egress Travel 1006.2.1 Compartmentation Ambulatory care facilities 422.2, 422.3 Group I-2 407.5, 407.6 Group I-3 408.6 Laboratory suites 428.3 Underground buildings 405.4, 405.5.2 Compressed Gas 307.2, 415.11.8 Concealed Spaces 413.2, 718 Concrete Chapters 19 and 19A Anchorage 1901.3 Calculated fire resistance 722.2

Cellular 721.2

Construction documents 1603.1,

1901.5 Durability 1904 Footings 1809, 1906 Foundation walls 1807.1.5, 1808.8 Materials 1705.3.2, 1901, 1903 Plain, structural 1906 Reinforced gypsum concrete 2514 Rodentproofing Appendix F Roof tile 1504.3, 1507.3, 1513 Shotcrete 1908 Slabs-on-ground 1907 Special inspections 1705.3, Table 1705.3 Specifications 1903 Strength testing 1705.3.2 Structural concrete with GFRP

reinforcement 1901.2.1 Wood support 2304.13 Concrete Masonry Calculated fire resistance 722.3

Construction 2104

Design 2101.2, 2108, 2109 Materials 2103.1 Surface bonding 2103.2.2, 2109.2 Wood support 2304.13 Concrete Roof Tile 1504.3, 1507.3, 1513 Wind Resistance 1504.3, 1609.6.3.1 Condominium (see Apartment Houses) Conduit, Penetration Protection 713.3,

1023.5 Conflicts in Code 102, 104.2.4.1 Congregate Living Facilities 310.2, 310.3, 310.4

Construction (See Safeguards During Construction) Construction Documents 107, 1603 Alarms and detection 907.1.1

Balconies 107.2.5
CBC § 1106.2.6. Medium relevance — show source text
(1) The space(s) containing the machinery is (are) separated from other occupancies by tight construction with tightfitting doors.

(2) Access is restricted to authorized personnel.

(3) Refrigerant detectors are installed with the sensing location and alarm level as required in refrigeration machinery rooms in accordance with Section 1106.2.6.

(4) Open flames and surfaces exceeding 800°F (427°C) shall not be permitted where a Group A2, B2, A3, or B3 refrigerant, is used.

(5) Electrical equipment that is in accordance with Class 1, Division 2, of NFPA 70 where the quantity of a Group A2, B2, A3, or B3 refrigerant in an independent circuit is capable of exceeding 25 percent of the lower flammability limit (LFL) upon release to the space based on the volume determined in accordance with Section 1104.2.1 through Section 1104.2.3.

(6) Refrigerant containing parts in systems exceeding 100 horsepower (74.6 kW) compressor drive power, except evaporators used for refrigeration or dehumidification, condensers used for heating, control and pressure-relief valves for either, low-probability pumps, and connecting piping, are located in a machinery room or outdoors.

[ASHRAE 15:7.2.2]

1104.5 Flammable Refrigerants. The total of Group A2, B2, A3, and B3 refrigerants, other than Group A2L and B2L refrigerants shall not exceed 1100 pounds (498.9 kg) without approval by the Authority Having Jurisdiction. Institutional Occupancies shall comply with Section 1104.3. Machinery rooms required in accordance with Section 1106.0 based on flammability shall be constructed and maintained in accordance with Section 1106.2.1 through Section 1106.2.6 and Section 1106.11 for Group A2L and B2L refrigerants. 1104.6 Group A2L Refrigerants for Human Comfort. High-probability systems using Group A2L refrigerants for human comfort applications shall comply with this section.

[ASHRAE 15:7.6]

1104.6.1 Refrigerant Concentration Limits. Occupied spaces shall comply with the releasable charge limitations of the equipment listing and ASHRAE 15. Unoccupied spaces with refrigerant containing equipment, not including continuous piping or tubing, shall comply with the releasable charge limitations of the equipment listing or Section 1104.6.4. {ASHRAE 15:7.6.1-7.6.1.2}

1104.6.2 Listing and Installation Requirements. Refrigeration systems shall be listed and shall be installed in accordance with listing, the manufacturer’s instructions, and any markings on the equipment restricting the installation. [ASHRAE 15:7.6.2]

1104.6.2.1 Nameplate. The nameplate required by Section 1115.5 shall include a symbol indicating that a flammable refrigerant is used, as specified by the product listing. [ASHRAE 15:7.6.2.1]

1104.6.2.2 Labeling. A label indicating a flammable refrigerant is used shall be placed adjacent to service ports and other locations where service involving components containing refrigerant is performed, as specified by the product listing.
CBC § 101.2.2 Medium relevance — show source text
CFC—25: California Fire Code

101.2.2, 101.4.2, 301.3.1, 302.2, 307.1, 308.1, 802.2.1, 802.2.3, 803.2.3, 803.4.1.1, 803.4.1.2, 803.4.1.3, 803.4.1.4, 803.4.1.5, 803.4.1.6, Table 804.5.1.1(1), 904.1.5, 1011.6.1.1, 1303.1.2, 1305.2.8.1, 1305.2.14, 1305.2.14.1, 1401.2, 1501.1, 1501.5, 1502.1, 1502.1.1, 1502.2, 1502.3, 1504.1, 1507.1, 1507.2

CMC—25: California Mechanical Code

302.2, 702.7, 807.1, 902.1.1, 1008.1, 1305.2.7.1, 1305.2.8, 1305.2.8.1

CPC—25: California Plumbing Code

302.2, 408.1, 702.7, 1009.1, 1009.2, 1009.3, 1009.5, 1302.1.6, 1503.1

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REFERENCED STANDARDS

CRC—25: California Residential Code

101.2, 101.4.1, 104.3.1, 109.3.3, 109.3.10, 302.2, 307.1, 308.1, 401.3, 402.1, 405.2.6, 502.2, 502.3, 502.4, 503.2, 503.3, 503.11, 505.2, 505.3, 507.3, 701.3, 702.4, 702.5, 706.2, 708.1, 805.2, 806.4, 809.1, 906.2, 907.1, 1011.2.1, 1103.1, 1103.2, 1103.3, 1104.1, 1201.4, 1302.1.2, 1302.1.3, 1302.1.3, 1303.1.3, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6

ICC 300—2023: ICC Standard on Bleachers, Folding and Telescopic Seating and Grandstands

301.1.1, 401.1.1, 1401.1.1

ICC A117.1—2017: Accessible and Usable Buildings and Facilities

CFC § J102 Medium relevance — show source text

to:

Impact-resistant drywall.
Impact-resistant glazing, such as blast or hurricane-type glass.
All types of roof and floor structural members including but not limited to post-tension concrete, bar joists, solid wood joists, rafters, trusses, cold-formed galvanized steel, I-joists and I-beams; green roof with vegetation, soil and plants.
Hazardous materials (such as explosives, chemicals, plastics).
Solar panels and DC electrical energy.
HVAC system; and smoke management system for pressurization and exhaust methods.
Other unique characteristic(s) within the building that are ranked according to a potential risk to occupants and firefighters.

J101.8 Sign classification maintenance, building information. Sign maintenance shall comply with each of the following:

Fire departments in the jurisdiction shall define the designations to be placed within the sign.
Fire departments in the jurisdiction shall conduct annual inspections to verify compliance with this section of the code and shall notify the owner, or the owner’s agent, of any required updates to the sign in accordance with fire department designations and the owner, or the owner’s agent, shall comply within 30 days.
The owner of a building shall be responsible for the maintenance and updates to the sign in accordance with fire department designations.

J101.9 Training. Jurisdictions shall train fire department personnel on Sections J101.1 through J101.8.

SECTION J102—REFERENCED STANDARDS

J102.1 General. See Table J102.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.

TABLE J102.1—REFERENCED STANDARDS	Col2	Col3
STANDARD ACRONYM	STANDARD NAME	SECTIONS HEREIN REFERENCED
CBC—25	California Building Code	J101.3, J101.5
NFPA 13—22	Installation of Sprinkler Systems	J101.6

2025 CALIFORNIA FIRE CODE APPENDIX J-5

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APPENDIX J-6 2025 CALIFORNIA FIRE CODE

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CALIFORNIA FIRE CODE – MATRIX ADOPTION TABLE

APPENDIX K – CONSTRUCTION REQUIREMENTS FOR EXISTING AMBULATORY CARE FACILITIES

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

(Not adopted by the State Fire Marshal)

CBC § 304.3.3 Medium relevance — show source text

304.3.3 Criteria for incidental and minor structural alteration, additions, or repairs of pre-1973 code buildings. [OSHPD 1R, 2, 4 & 5] Provisions of this section shall apply to hospital buildings which were originally designed to pre-1973 building codes, and had no major structural alterations, additions or repairs using 1973 California Building Standards Code or later editions with an OSHPD permit. 1. Nonstructural components. Component importance factor, I p , shall be permitted to be 1.0. Exception: Components required for life safety purposes after an earthquake, including emergency, standby or alternative power systems, mechanical smoke removal systems, fire protection sprinkler systems, fire alarm control panels and egress stairways shall have a component importance factor (I p ) of 1.5.

SECTION 305—IN-SITU LOAD TESTS

[BS] 305.1 General. Where used, in-situ load tests shall be conducted in accordance with Section 1708 of the California Building Code .

SECTION 306—ACCESSIBILITY FOR EXISTING BUILDINGS

[DSA-AC] Public buildings, public accommodations, commercial facilities and public housing regulated by the Division of the State Architect-Access Compliance in Title 24, Part 2, California Building Code, Chapter 1, Section 1.9.1 shall comply with Title 24, Part 2, California Building Code, Chapter 11B.

[HCD 1-AC] Accessibility requirements for covered multifamily dwellings, as defined in Chapter 2 of the California Building Code, are promulgated under HCD authority and are located in Chapter 11A of the California Building Code.

SECTION 307—SMOKE ALARMS

307.1 Smoke alarms. Where an alteration, addition, change of occupancy or relocation of a building is made to an existing building or structure of a Group R and I-1 occupancy, the existing building shall be provided with smoke alarms in accordance with the California Fire Code or Section R310 of the California Residential Code .

Exception: Work classified as Level 1 Alterations in accordance with Chapter 7.

SECTION 308—CARBON MONOXIDE DETECTION

308.1 Carbon monoxide detection. Where an addition, alteration, change of occupancy or relocation of a building is made to an existing building, the existing building shall be provided with carbon monoxide detection in accordance with the California Fire Code or Section R311 of the California Residential Code .

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PROVISIONS FOR ALL COMPLIANCE METHODS

308.2 Carbon monoxide alarms in existing portions of a building. [HCD 1 & HCD 2] Pursuant to Health and Safety Code Section 17926, carbon monoxide detection shall be provided in all existing Group R buildings, as required in Section 915 of the California Building Code or Section R315 of the California Residential Code, as applicable.
CBC § 1220.4.2 Medium relevance — show source text
8|1220.4.2 – 1220.4.6| |1221.7|1221.6| |1308.2 – 1308.4.1|1308.3 – 1308.5.1| |Table 1308.3.1|Table 1308.4.1| |1308.4.2|1308.5.2| |1308.4.2.2 – 1308.6.4|1308.5.2.1 – 1308.7.3| |Table 1308.4.6.2|Table 1308.5.6.2| |1308.6.5 – 1308.13.1|1308.7.7 – 1308.14.1| |1312.1.2 – 1312.1.3|1312.1.1 – 1312.1.2| |Chapter 17|Appendix F| |Chapter 18|Chapter 17| |D 103.2|D 103.1| |E 503.5.6.7|E 503.5.6.6| |E 503.5.7.2 – E 503.5.7.6|E 503.5.7.1 – E 503.5.7.5| |Table E 503.5.7.2|Table E 503.5.7.1| |Table E 503.5.7.6|Table E 503.5.7.5| |Table E 503.5.10.1.2(1)|Table E 503.5.10(1)| |Table E 503.5.10.1.2(2)|Table E 503.5.10(2)| |E 503.5.10.1.2|E 503.5.10| |E 503.5.10.2 – E 503.5.10.2.2|E 503.5.10.1 – E 503.5.10.1.2| |E 503.5.12.1|E 503.5.12| |E 503.5.12.2|E 503.5.12.1| |E 503.6.5.4|E 503.6.5.4.1|

xxii 2025 CALIFORNIA MECHANICAL CODE

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Uniform Mechanical Code – 2024 Edition:

The Uniform Mechanical Code contains complete requirements for the installation and maintenance of heating, ventilating, cooking and refrigeration systems.

Uniform Mechanical Code Illustrated Training Manual:
CBC § 1503.4 Medium relevance — show source text
3 & Exceptions
1503.4_Exception_
Table 1503.4||X||X||||||||||||||||||||| |Adopting Agency
Adopt Entire Chapter
Adopt Entire Chapter as
amended (amended
sections listed below)
Adopt only those sections
that are listed below
Chapter/Section
1501.0
1501.1
1501.1.1
1501.2
1501.2 Exceptions
1501.3
1501.3 &Exception
1501.4
1501.5
1501.5_Exception_
Table 1501.5
1501.5.1
1501.6
1501.7
1501.8
1501.9
1501.9.1
1501.9.2
1501.10
1502.0
1502.1
1502.1_Exception_
1502.3
1502.3.2
1502.3.3
1502.4 Exception
1502.5 - 1502.6
1503.0
1503.1
1503.1.1
1503.1.1 - 1503.1.3
1503.2 - 1503.2.3
1503.2.2_Exception_
1503.3 & Exceptions
1503.4_Exception_
Table 1503.4||X||X|||||||||||||||||||||

2025 CALIFORNIA PLUMBING CODE 307

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE

CHAPTER 15 - ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS (continued) (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

CBC § 414.1.3. Medium relevance — show source text

Where manufactured, generated or used in such a manner that the concentration and conditions create a fire or explosion hazard based on information prepared in accor-
dance with Section 414.1.3.
p._ High Burning Velocity_(High BV) Category 1B flammable gas has a burning velocity greater than 3.9 inches per second (10 cm/s).Low Burning Velocity (Low BV) Category 1B
flammable gas has a burning velocity of 3.9 inches per second (10 cm/s) or less.|

2025 CALIFORNIA BUILDING CODE 3-9

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�

OCCUPANCY CLASSIFICATION AND USE

[F] TABLE 307.1(2)—MAXIMUM ALLOWABLE QUANTITY PER CONTROL AREA OF HAZARDOUS MATERIALS POSING A HEALTH HAZARDa, h, i	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9
MATERIAL	STORAGEb	STORAGEb	STORAGEb	USE-CLOSED SYSTEMSb	USE-CLOSED SYSTEMSb	USE-CLOSED SYSTEMSb	USE-OPEN SYSTEMSb	USE-OPEN SYSTEMSb
MATERIAL	Solid poundsd, e, f	Liquid gallons (pounds)d, e, f	Gas cubic feet at NTP (pounds)d	Solid poundsd	Liquid gallons (pounds)d	Gas cubic feet at NTP (pounds)d	Solid poundsd	Liquid gallons (pounds)d
Corrosives	5,000	500	Gaseous 810e	5,000	500	Gaseous 810e	1,000	100
Corrosives	5,000	500	Liquefied (150)	Liquefied (150)	Liquefied (150)	Liquefied (150)	Liquefied (150)	Liquefied (150)
Highly Toxic	10	(10)	Gaseous 20g	10	(10)	Gaseous 20g	3	(3)
Highly Toxic	10	(10)	Liquefied (4)g	Liquefied (4)g	Liquefied (4)g	Liquefied (4)g	Liquefied (4)g	Liquefied (4)g
Toxic	500	(500)	Gaseous 810e	500	(500)	Gaseous 810e	125	(125)
Toxic	500	(500)	Liquefied (150)e	Liquefied (150)e	Liquefied (150)e	Liquefied (150)e	Liquefied (150)e	Liquefied (150)e
For SI: 1 cubic foot = 0.028 m3,

CBC § 2.2 Medium relevance — show source text
1. Solids: (aceto) phenylmercury (phenyl mercuric acetate), 4-aminopyridine, arsenic pentoxide, arsenic trioxide, calcium cyanide, 2-chloroacetophenone, aflatoxin B, decaborane(14), mercury (II) bromide (mercuric bromide), mercury (II) chloride (corrosive mercury chloride), pentachlorophenol, methyl parathion, phosphorus (white) and sodium azide.
E102.2.2 Toxic materials. Examples include:
1. Gases: boron trichloride, boron trifluoride, chlorine, chlorine trifluoride, hydrogen fluoride, hydrogen sulfide, phosgene, silicon tetrafluoride.
2. Liquids: acrylonitrile, allyl alcohol, alpha-chlorotoluene, aniline, 1-chloro-2,3-epoxypropane, chloroformic acid (allyl ester), 3-chloropropene (allyl chloride), o-cresol, crotonaldehyde, dibromomethane, diisopropylamine, diethyl ester sulfuric acid, dimethyl ester sulfuric acid, 2-furaldehyde (furfural), furfural alcohol, phosphorus chloride, phosphoryl chloride (phosphorus oxychloride) and thionyl chloride.
3. Solids: acrylamide, barium chloride, barium (II) nitrate, benzidine, p-benzoquinone, beryllium chloride, cadmium chloride, cadmium oxide, chloroacetic acid, chlorophenylmercury (phenyl mercuric chloride), chromium (VI) oxide (chromic acid, solid), 2,4-dinitrotoluene, hydroquinone, mercury chloride (calomel), mercury (II) sulfate (mercuric sulfate), osmium tetroxide, oxalic acid, phenol, P-phenylenediamine, phenylhydrazine, 4-phenylmorpholine, phosphorus sulfide, potassium fluoride, potassium hydroxide, selenium (IV) disulfide and sodium fluoride.
APPENDIX E-6 2025 CALIFORNIA FIRE CODE

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

APPENDIX E—HAZARD CATEGORIES

E102.2.3 Corrosives. Examples include:
1. Acids: Examples: chromic, formic, hydrochloric (muriatic) greater than 15 percent, hydrofluoric, nitric (greater than 6 percent, perchloric, sulfuric (4 percent or more).
2. Bases (alkalis): hydroxides-ammonium (greater than 10 percent), calcium, potassium (greater than 1 percent), sodium (greater than 1 percent); certain carbonates-potassium.
3. Other corrosives: bromine, chlorine, fluorine, iodine, ammonia.
Note: Corrosives that are oxidizers (for example, nitric acid, chlorine, fluorine), compressed gases (for example, ammonia, chlorine, fluorine), or water-reactive (for example, concentrated sulfuric acid, sodium hydroxide) are physical hazards in addition to being health hazards.

SECTION E103—EVALUATION OF HAZARDS
CBC § 0.05 Medium relevance — show source text
5|0.05|0.05| |Water reactive|Class 1|Not Limited|Not Limited|Not Limited| |HEALTH-HAZARD MATERIALS|HEALTH-HAZARD MATERIALS|HEALTH-HAZARD MATERIALS|HEALTH-HAZARD MATERIALS|HEALTH-HAZARD MATERIALS| |Corrosives|Corrosives|Not Limited|Not Limited|Not Limited| |Highly toxic|Highly toxic|Not Limited|Not Limited|Note d| |Toxics|Toxics|Not Limited|Not Limited|Note d| |For SI: 1 pound = 0.454 kg, 1 pound per square foot = 4.882 kg/m2, 1 gallon per square foot = 40.7 L/m2, 1 cubic foot @NTP/square foot = 0.305 m3 @NTP/m2, 1 cubic foot = 0.02832 m3.
a. Hazardous materials within piping shall not be included in the calculated quantities.
b. Quantity of hazardous materials in a single fabrication shall not exceed the maximum allowable quantities per control area in Tables 307.1(1) and 307.1(2).
c. Densely packed baled cotton that complies with the packing requirements of ISO 8115 shall not be included in this material class.
d. The aggregate quantity of flammable, pyrophoric, toxic and highly toxic gases shall not exceed the greater of 0.2 cubic feet at_NTP_/square foot or 9,000 cubic feet at_NTP_.
e. The aggregate quantity of pyrophoric gases in the building shall not exceed the amounts set forth in Table 415.6.5.
f. Quantity of Class 3 water-reactive solids in a single tool shall not exceed 1 pound.|For SI: 1 pound = 0.454 kg, 1 pound per square foot = 4.882 kg/m2, 1 gallon per square foot = 40.7 L/m2, 1 cubic foot @NTP/square foot = 0.305 m3 @NTP/m2, 1 cubic foot = 0.02832 m3.
a. Hazardous materials within piping shall not be included in the calculated quantities.
b. Quantity of hazardous materials in a single fabrication shall not exceed the maximum allowable quantities per control area in Tables 307.1(1) and 307.1(2).
c. Densely packed baled cotton that complies with the packing requirements of ISO 8115 shall not be included in this material class.
d. The aggregate quantity of flammable, pyrophoric, toxic and highly toxic gases shall not exceed the greater of 0.2 cubic feet at_NTP_/square foot or 9,000 cubic feet at_NTP_.
e. The aggregate quantity of pyrophoric gases in the building shall not exceed the amounts set forth in Table 415.6.5.
f. Quantity of Class 3 water-reactive solids in a single tool shall not exceed 1 pound.|For SI: 1 pound = 0.454 kg, 1 pound per square foot = 4.882 kg/m2, 1 gallon per square foot = 40.7 L/m2, 1 cubic foot @NTP/square foot = 0.305 m3 @NTP/m2, 1 cubic foot = 0.02832 m3.
a. Hazardous materials within piping shall not be included in the calculated quantities.
b.
CBC § 2.3 Medium relevance — show source text
APPENDIX E-6 2025 CALIFORNIA FIRE CODE

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

APPENDIX E—HAZARD CATEGORIES

E102.2.3 Corrosives. Examples include:
1. Acids: Examples: chromic, formic, hydrochloric (muriatic) greater than 15 percent, hydrofluoric, nitric (greater than 6 percent, perchloric, sulfuric (4 percent or more).
2. Bases (alkalis): hydroxides-ammonium (greater than 10 percent), calcium, potassium (greater than 1 percent), sodium (greater than 1 percent); certain carbonates-potassium.
3. Other corrosives: bromine, chlorine, fluorine, iodine, ammonia.
Note: Corrosives that are oxidizers (for example, nitric acid, chlorine, fluorine), compressed gases (for example, ammonia, chlorine, fluorine), or water-reactive (for example, concentrated sulfuric acid, sodium hydroxide) are physical hazards in addition to being health hazards.

SECTION E103—EVALUATION OF HAZARDS

E103.1 Degree of hazard. The degree of hazard present depends on many variables that should be considered individually and in combination. Some of these variables are as shown in Sections E103.1.1 through E103.1.5.

E103.1.1 Chemical properties of the material. Chemical properties of the material determine self reactions and reactions that could occur with other materials. Generally, materials within subdivisions of hazard categories will exhibit similar chemical properties. However, materials with similar chemical properties could pose very different hazards. Each individual material should be researched to determine its hazardous properties and then considered in relation to other materials that it might contact and the surrounding environment.

E103.1.2 Physical properties of the material. Physical properties, such as whether a material is a solid, liquid or gas at ordinary temperatures and pressures, considered along with chemical properties will determine requirements for containment of the material. Specific gravity (weight of a liquid compared to water) and vapor density (weight of a gas compared to air) are both physical properties that are important in evaluating the hazards of a material.

E103.1.3 Amount and concentration of the material. The amount of material present and its concentration must be considered along with physical and chemical properties to determine the magnitude of the hazard. Hydrogen peroxide, for example, is used as an antiseptic and a hair bleach in low concentrations (approximately 8 percent in water solution). Over 8 percent, hydrogen peroxide is classed as an oxidizer and is toxic. Above 90 percent, it is a Class 4 oxidizer “that can undergo an explosive reaction when catalyzed or exposed to heat, shock or friction,” a definition that, incidentally, places hydrogen peroxide over 90-percent concentration in the unstable (reactive) category. Small amounts at high concentrations could present a greater hazard than large amounts at low concentrations.

E103.1.3.1 Mixtures. Gases—toxic and highly toxic gases include those gases that have an LC 50 of 2,000 parts per million (ppm) or less when rats are exposed for a period of 1 hour or less. To maintain consistency with the definitions for these materials, exposure data for periods other than 1 hour must be normalized to 1 hour.

CBC § 0.06 Medium relevance — show source text

006|0.06|0.06| |Oxidizer|Class 1|0.006|0.06|0.06| |Combination Class|1, 2, 3|0.006|0.06|0.06|

2025 CALIFORNIA BUILDING CODE 4-45

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

SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY AND USE

[F] TABLE 415.11.1.1—QUANTITY LIMITS FOR HAZARDOUS MATERIALS IN A SINGLE FABRICATION AREA IN GROUP H-5a—continued	Col2	Col3	Col4	Col5
HAZARD CATEGORY	HAZARD CATEGORY	SOLIDS (pounds per square foot)	LIQUIDS (gallons per square foot)	GAS (cubic feet @ NTP/square foot)
Pyrophoric materials	Pyrophoric materials	Note b	0.0025	Notes d and e
Unstable (reactive)	Class 4	Note b	Note b	Note b
Unstable (reactive)	Class 3	0.05	0.005	Note b
Unstable (reactive)	Class 2	0.2	0.02	Note b
Unstable (reactive)	Class 1	Not Limited	Not Limited	Not Limited
Water reactive	Class 3	0.02f	0.0025	Not Applicable
Water reactive	Class 2	0.5	0.05	0.05
Water reactive	Class 1	Not Limited	Not Limited	Not Limited
HEALTH-HAZARD MATERIALS	HEALTH-HAZARD MATERIALS	HEALTH-HAZARD MATERIALS	HEALTH-HAZARD MATERIALS	HEALTH-HAZARD MATERIALS
Corrosives	Corrosives	Not Limited	Not Limited	Not Limited
Highly toxic	Highly toxic	Not Limited	Not Limited	Note d
Toxics	Toxics	Not Limited	Not Limited	Note d
For SI: 1 pound = 0.454 kg, 1 pound per square foot = 4.882 kg/m2, 1 gallon per square foot = 40.7 L/m2, 1 cubic foot @NTP/square foot = 0.305 m3 @NTP/m2, 1 cubic foot = 0.02832 m3. a. Hazardous materials within piping shall not be included in the calculated quantities. b. Quantity of hazardous materials in a single fabrication shall not exceed the maximum allowable quantities per control area in Tables 307.1(1) and 307.1(2). c. Densely packed baled cotton that complies with the packing requirements of ISO 8115 shall not be included in this material class. d. The aggregate quantity of flammable, pyrophoric, toxic and highly toxic gases shall not exceed the greater of 0.2 cubic feet at_NTP_/square foot or 9,000 cubic feet at_NTP_. e. The aggregate quantity of pyrophoric gases in the building shall not exceed the amounts set forth in Table 415.6.5. f.

CBC § 5005.2.2 Medium relevance — show source text
LIQUIDS USE**|OUTDOOR LIQUIDS USE|OUTDOOR LIQUIDS USE| |Flammable solids|Flammable solids|Not Applicable|Not Applicable| |Organic peroxides|Unclassified Detonable|Required|Required| |Organic peroxides|Class I|Required|Required| |Organic peroxides|Class II|Class II|Class II| |Organic peroxides|Class III|Class III|Class III| |Organic peroxides|Class IV|Class IV|Class IV| |Organic peroxides|Class V|Not Required|Not Required| |Oxidizers|Class 4|Required|Required| |Oxidizers|Class 3|Class 3|Class 3| |Oxidizers|Class 2|Class 2|Class 2| |Oxidizers|Class 1|Class 1|Class 1| |Pyrophorics|Pyrophorics|Required|Required| |Unstable (reactives)|Class 4|Required|Required| |Unstable (reactives)|Class 3|Class 3|Class 3| |Unstable (reactives)|Class 2|Class 2|Class 2| |Unstable (reactives)|Class 1|Not Required|Required| |Water reactives|Class 3|Required|Required| |Water reactives|Class 2|Class 2|Class 2| |Water reactives|Class 1|Not Required|Required| |2. Health-hazard materials|2. Health-hazard materials|2. Health-hazard materials|2. Health-hazard materials| |Corrosives|Corrosives|Required|Required| |Highly toxics|Highly toxics|Highly toxics|Highly toxics| |Toxics|Toxics|Toxics|Toxics|

5005.2.2 Closed systems. Use of hazardous materials in closed containers or systems shall be in accordance with Sections 5005.2.2.1 through 5005.2.2.4.

5005.2.2.1 Ventilation. Where closed systems are designed to be opened as part of normal operations, ventilation shall be provided in accordance with Section 5005.2.1.1.

5005.2.2.2 Explosion control. Explosion control shall be provided in accordance with Section 5004.6 where an explosive environment exists because of the hazardous materials dispensed or used, or as a result of the dispensing or use process.

Exception: Where process vessels are designed to contain fully the worst-case explosion anticipated within the vessel under process conditions based on the most likely failure.

5005.2.2.3 Spill control for hazardous material liquids. Buildings, rooms or areas where hazardous material liquids are used in individual vessels exceeding a 55-gallon (208 L) capacity shall be provided with spill control in accordance with Section 5004.2.1.

5005.2.2.4 Secondary containment for hazardous material liquids. Where required by Table 5005.2.1.4, buildings, rooms or areas where hazardous material liquids are used in vessels or systems shall be provided with secondary containment in accordance with Section 5004.2.2 where the capacity of an individual vessel or system or the capacity of multiple vessels or systems exceeds the following:
1. Individual vessel or system: greater than 55 gallons (208 L).
2. Multiple vessels or systems: greater than 1,000 gallons (3785 L).

CBC § 50-22 Medium relevance — show source text

50-22 2025 CALIFORNIA FIRE CODE

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

HAZARDOUS MATERIALS—GENERAL PROVISIONS

TABLE 5004.2.2—REQUIRED SECONDARY CONTAINMENT—HAZARDOUS MATERIAL SOLIDS AND LIQUIDS STORAGE—continued	Col2	Col3	Col4	Col5	Col6
MATERIAL	MATERIAL	INDOOR STORAGE	INDOOR STORAGE	OUTDOOR STORAGE	OUTDOOR STORAGE
MATERIAL	MATERIAL	Solids	Liquids	Solids	Liquids
Pyrophorics	Pyrophorics	Not Required	Required	Not Required	Required
Unstable (reactives)	Class 4	Required	Required	Required	Required
Unstable (reactives)	Class 3	Class 3	Class 3	Class 3	Class 3
Unstable (reactives)	Class 2	Class 2	Class 2	Class 2	Class 2
Unstable (reactives)	Class 1	Not Required	Not Required	Not Required	Not Required
Water reactives	Class 3	Required	Required	Required	Required
Water reactives	Class 2	Class 2	Class 2	Class 2	Class 2
Water reactives	Class 1	Not Required	Not Required	Not Required	Not Required
2. Health-hazard materials	2. Health-hazard materials	2. Health-hazard materials	2. Health-hazard materials	2. Health-hazard materials	2. Health-hazard materials
Corrosives	Corrosives	Not Required	Required	Not Required	Required
Highly toxics	Highly toxics	Required	Required	Required	Required
Toxics	Toxics	Toxics	Toxics	Toxics	Toxics

CBC § 6.1507 Medium relevance — show source text
LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
where× = Condenser DT + LIFT
COPadj = Kadj * COPstd|1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
where× = Condenser DT + LIFT
COPadj = Kadj * COPstd|1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
where× = Condenser DT + LIFT
COPadj = Kadj * COPstd|1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
where× = Condenser DT + LIFT
COPadj = Kadj * COPstd|1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
where× = Condenser DT + LIFT
COPadj = Kadj * COPstd|1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2. Condenser DT = Leaving Condenser Water Temperature (°F) – Entering Condenser Water Temperature (°F)
Kadj = 6.1507 – 0.30244(×) + 0.0062692(×)2 – 0.000045595(×)3
where× = Condenser DT + LIFT
COPadj = Kadj * COPstd|

A6.207.1.2 Controls for heat pumps with supplementary electric resistance heaters. Heat pumps with supplementary electric resistance heaters shall have controls:

A6.207.1.2.1 That prevent supplementary heater operation when the heating load can be met by the heat pump alone; and
CBC § 103.4 Medium relevance — show source text
Class I, II or IIIA flammable or combustible liquids that are used or stored in normally open containers or systems, or in closed containers or systems pressurized at more than 15 pounds per square inch gauge (103.4 kPa).

Combustible dusts where manufactured, generated or used in such a manner that the concentration and conditions create a fire or explosion hazard based on information prepared in accordance with Section 414.1.3.

Cryogenic fluids, flammable.

Category 1A flammable gases.

Category 1B flammable gases having a burning velocity greater than 3.9 inches per second (10 cm/s).

Organic peroxides, Class I.

Oxidizers, Class 3, that are used or stored in normally open containers or systems, or in closed containers or systems pressurized at more than 15 pounds per square inch gauge (103 kPa).

Pyrophoric liquids, solids and gases, nondetonable.

Unstable (reactive) materials, Class 3, nondetonable.

Water-reactive materials, Class 3.

[F] 307.5 High-hazard Group H-3. Buildings and structures containing materials that readily support combustion or that pose a physical hazard shall be classified as Group H-3. Such materials shall include, but not be limited to, the following:

Class I, II or IIIA flammable or combustible liquids that are used or stored in normally closed containers or systems pressurized at 15 pounds per square inch gauge (103.4 kPa) or less

Combustible fibers, other than densely packed baled cotton, where manufactured, generated or used in such a manner that the concentration and conditions create a fire or explosion hazard based on information prepared in accordance with Section 414.1.3

Consumer fireworks, 1.4G (Class C, Common)

Cryogenic fluids, oxidizing

Category 1B flammable gases having a burning velocity of 3.9 inches per second (10 cm/s) or less.

Flammable solids

Organic peroxides, Class II and III

Oxidizers, Class 2

Oxidizers, Class 3, that are used or stored in normally closed containers or systems pressurized at 15 pounds per square inch gauge (103 kPa) or less

Oxidizing gases

Unstable (reactive) materials, Class 2

Water-reactive materials, Class 2

[F] 307.6 High-hazard Group H-4. Buildings and structures containing materials that are health hazards shall be classified as Group H-4. Such materials shall include, but not be limited to, the following:

Corrosives

Highly toxic materials

Toxic materials

3-12 2025 CALIFORNIA BUILDING CODE

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

OCCUPANCY CLASSIFICATION AND USE

[F] 307.7 High-hazard Group H-5. Semiconductor fabrication facilities and comparable research and development areas in which hazardous production materials (HPM) are used and the aggregate quantity of materials is in excess of those specified in Tables 307.1(1) and 307.1(2) shall be classified as Group H-5. Such facilities and areas shall be designed and constructed in accordance with Section 415.11.
CBC § 203.6.5 Medium relevance — show source text
Organic peroxides, Class I

Oxidizers, Class 3, that are used or stored in normally open containers or systems, or in closed containers or systems pressurized at more than 15 pounds per square inch gauge (103 kPa)

Pyrophoric liquids, solids and gases, nondetonable

Unstable (reactive) materials, Class 3, nondetonable

Water-reactive materials, Class 3

203.6.5 High-hazard Group H-3. Buildings and structures containing materials that readily support combustion or that pose a physical hazard shall be classified as Group H-3. Such materials shall include, but not be limited to, the following:

Class I, II or IIIA flammable or combustible liquids that are used or stored in normally closed containers or systems pressurized at 15 pounds per square inch gauge (103.4 kPa) or less

Combustible fibers, other than densely packed baled cotton, where manufactured, generated or used in such a manner that the concentration and conditions create a fire or explosion hazard based on information prepared in accordance with Section 414.1.3 of the California Building Code

Consumer fireworks, 1.4G (Class C, Common)

Cryogenic fluids, oxidizing

Category 1B flammable gases having a burning velocity of 3.9 inches per second (99 mm/s) or less

Flammable solids

Organic peroxides, Class II and III

Oxidizers, Class 2

Oxidizers, Class 3, that are used or stored in normally closed containers or systems pressurized at 15 pounds per square inch gauge (103 kPa) or less

Oxidizing gases

Unstable (reactive) materials, Class 2

Water-reactive materials, Class 2

203.6.6 High-hazard Group H-4. Buildings and structures containing materials that are health hazards shall be classified as Group H-4. Such materials shall include, but not be limited to, the following:

Corrosives

Highly toxic materials

Toxic materials

203.6.7 High-hazard Group H-5. Semiconductor fabrication facilities and comparable research and development areas in which hazardous production materials (HPM) are used and the aggregate quantity of materials is in excess of those specified in Tables 5003.1.1(1) and 5003.1.1(2) shall be classified as Group H-5. Such facilities and areas shall be designed and constructed in accordance with Section 415.11 of the California Building Code .

203.6.8 Multiple hazards. Buildings and structures containing a material or materials representing hazards that are classified in one or more of Groups H-1, H-2, H-3 and H-4 shall conform to the code requirements for each of the occupancies so classified.

[BG] 203.7 Institutional Group I. Institutional Group I occupancy includes, among others, the use of a building or structure, or a portion thereof, in which care or supervision is provided to persons who are or are incapable of self-preservation without physical assistance or in which persons are detained for penal or correctional purposes or in which the liberty of the occupants is restricted. Institutional occupancies shall be classified as Group I-2, I-3 or I-4. Restraint shall not be permitted in any building except in Group I-2 occupancies constructed for such use in accordance with Section 407.1.1 of the California Building Code and Group I-3 occupancies constructed for such use, in accordance with Section 408.1.2 of the California Building Code.
CBC § 7.47 Medium relevance — show source text
15|7.47|7.72|8.10|8.37|8.58| |45|75|30|7.05|7.35|7.58|7.93|8.18|8.36| |44|75|31|6.95|7.23|7.45|7.77|8.00|8.16| |43|75|32|6.85|7.13|7.33|7.63|7.83|7.98| |42|75|33|6.75|7.03|7.22|7.49|7.68|7.82| |41|75|34|6.65|6.93|7.12|7.37|7.55|7.67| |46|80|34|6.65|6.93|7.12|7.37|7.55|7.67| |40|75|35|6.55|6.83|7.01|7.26|7.42|7.54| |45|80|35|6.55|6.83|7.01|7.26|7.42|7.54| |44|80|36|6.44|6.73|6.92|7.15|7.30|7.41| |43|80|37|6.32|6.63|6.82|7.05|7.19|7.30| |42|80|38|6.20|6.53|6.72|6.95|7.09|7.19| |41|80|39|6.06|6.42|6.62|6.85|6.99|7.08| |46|85|39|6.06|6.42|6.62|6.85|6.99|7.08| |40|80|40|5.91|6.30|6.52|6.76|6.89|6.98| |45|85|40|5.91|6.30|6.52|6.76|6.89|6.98| |44|85|41|5.75|6.17|6.403|6.66|6.79|6.89| |43|85|42|5.57|6.03|6.28|6.55|6.70|6.79| |42|85|43|5.37|5.88|6.16|6.44|6.59|6.69| |41|85|44|5.15|5.71|6.01|6.33|6.49|6.59| |40|85|45|4.91|5.53|5.86|6.20|6.37|6.48| |Condenser DT2|Condenser DT2|Condenser DT2|14.04|11.23|9.36|7.02|5.62|4.68| |1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2.
CBC § 7.11 Medium relevance — show source text
80|7.11|7.35|7.71|7.97|8.16| |45|75|30|6.71|6.99|7.21|7.55|7.78|7.96| |44|75|31|6.61|6.89|7.09|7.40|7.61|7.77| |43|75|32|6.52|6.79|6.98|7.26|7.45|7.60| |42|75|33|6.43|6.69|6.87|7.13|7.31|7.44| |41|75|34|6.33|6.60|6.77|7.02|7.18|7.30| |46|80|34|6.33|6.60|6.77|7.02|7.18|7.30| |40|75|35|6.23|6.50|6.68|6.91|7.06|7.17| |45|80|35|6.23|6.50|6.68|6.91|7.06|7.17| |44|80|36|6.13|6.41|6.58|6.81|6.95|7.05| |43|80|37|6.02|6.31|6.49|6.71|6.85|6.94| |42|80|38|5.90|6.21|6.40|6.61|6.75|6.84| |41|80|39|5.77|6.11|6.30|6.52|6.65|6.74| |46|85|39|5.77|6.11|6.30|6.52|6.65|6.74| |40|80|40|5.63|6.00|6.20|6.43|6.56|6.65| |45|85|40|5.63|6.00|6.20|6.43|6.56|6.65| |44|85|41|5.47|5.87|6.10|6.33|6.47|6.55| |43|85|42|5.30|5.74|5.98|6.24|6.37|6.46| |42|85|43|5.11|5.60|5.86|6.13|6.28|6.37| |41|85|44|4.90|5.44|5.72|6.02|6.17|6.27| |40|85|45|4.68|5.26|5.58|5.90|6.07|6.17| |Condenser DT2|Condenser DT2|Condenser DT2|14.04|11.23|9.36|7.02|5.62|4.68| |1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2.
CBC § 6.44 Medium relevance — show source text
17|6.44|6.66|6.99|7.23|7.40| |45|75|30|6.08|6.34|6.54|6.84|7.06|7.22| |44|75|31|6.00|6.24|6.43|6.71|6.90|7.05| |43|75|32|5.91|6.15|6.33|6.58|6.76|6.89| |42|75|33|5.83|6.07|6.23|6.47|6.63|6.75| |41|75|34|5.74|5.98|6.14|6.36|6.51|6.62| |46|80|34|5.74|5.98|6.14|6.36|6.51|6.62| |40|75|35|5.65|5.90|6.05|6.26|6.40|6.51| |45|80|35|5.65|5.90|6.05|6.26|6.40|6.51| |44|80|36|5.56|5.81|5.97|6.17|6.30|6.40| |43|80|37|5.46|5.73|5.89|6.08|6.21|6.30| |42|80|38|5.35|5.64|5.80|6.00|6.12|6.20| |41|80|39|5.23|5.54|5.71|5.91|6.03|6.11| |46|85|39|5.23|5.54|5.71|5.91|6.03|6.11| |40|80|40|5.10|5.44|5.62|5.83|5.95|6.03| |45|85|40|5.10|5.44|5.62|5.83|5.95|6.03| |44|85|41|4.96|5.33|5.55|5.74|5.86|5.94| |43|85|42|4.81|5.21|5.42|5.66|5.78|5.86| |42|85|43|4.63|5.08|5.31|5.56|5.69|5.77| |41|85|44|4.45|4.93|5.19|5.46|5.60|5.69| |40|85|45|4.24|4.77|5.06|5.35|5.50|5.59| |Condenser DT2|Condenser DT2|Condenser DT2|14.04|11.23|9.36|7.02|5.62|4.68| |1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2.
CBC § 2-43 Medium relevance — show source text
Furniture

Hemp products

Jute products

Laundries

Leather products

Lithium-ion batteries

Machinery

Metals

Millwork (sash and door)

Motion picture and television production studio Sound Stages, Approved Production Facilities and production locations (without live audiences)

Motion pictures and television filming (without spectators)

Musical instruments

Optical goods

Paper mills or products

Photographic film

Plastic products

Printing or publishing

Recreational vehicles

Refuse incineration

Shoes

Soaps and detergents

Textiles

Tobacco

2025 CALIFORNIA FIRE CODE 2-43

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

DEFINITIONS

Trailers

Upholstering

Vehicles powered by lithium-ion or lithium metal batteries

Water/sewer treatment facilities

Wood; distillation

Woodworking (cabinet)

[BG] 203.5.1.1 Aircraft manufacturing facilities. Aircraft manufacturing facilities shall comply with Section 412.6 of the Cali- fornia Building Code .

[BG] 203.5.2 Low-hazard factory industrial, Group F-2. Factory industrial uses that involve the fabrication or manufacturing of noncombustible materials that during finishing, packing or processing does not involve a significant fire hazard shall be classified as Group F-2 occupancies and shall include, but not be limited to, the following:

Beverages: up to and including 20-percent alcohol content

Brick and masonry

Ceramic products

Foundries

Glass products

Gypsum

Ice

Metal products (fabrication and assembly)

203.6 High-hazard Group H. High-hazard Group H occupancy includes, among others, the use of a building or structure, or a portion thereof, that involves the manufacturing, processing, generation or storage of materials that constitute a physical or health hazard in quantities in excess of those allowed in control areas complying with Section 5003.8.3, based on the maximum allowable quantity limits for control areas set forth in Tables 5003.1.1(1) and 5003.1.1(2). Hazardous occupancies are classified in Groups H-1, H-2, H-3, H-4 and H-5 and shall be in accordance with this code and the requirements of Section 415 of the California Building Code . Hazardous materials stored or used on top of roofs or canopies shall be classified as rooftop storage or use and shall comply with this code.

203.6.1. Occupancy exemptions. Storage, use and handling of hazardous materials in accordance with Table 307.1.1 of the Cali- fornia Building Code shall not be counted as contributing to maximum allowable quantities and shall not cause classification of an occupancy to be Group H. Such storage, use and handling shall comply with applicable provisions of this code.

203.6.2 Hazardous materials. Hazardous materials in any quantity shall conform to the requirements of this code and Section 414 of the California Building Code .

203.6.3 High-hazard Group H-1. Buildings and structures containing materials that pose a detonation hazard shall be classified as Group H-1. Such materials shall include, but not be limited to, the following:

Detonable pyrophoric materials

Explosives:

Division 1.1

Division 1.2

Division 1.3

Division 1.4

Division 1.5

Division 1.6
CBC § 4.3.7 Medium relevance — show source text
(3) Rated shaft clearance at manufacturer’s requested dimensions, with or without specified ventilation. [NFPA 96:4.3.7]

507.4.7 Building and Structural Contact. A duct shall be permitted to contact noncombustible floors, interior walls, and other noncombustible structures or supports, but it shall not be in contact for more than 50 percent of its surface area for each linear foot of contact length. [NFPA 96:4.4.1]

507.4.7.1 Corrosion Protection. Where duct contact must exceed the requirements of Section 507.4.7, the duct shall be protected from corrosion.

[NFPA 96:4.4.2]

507.4.7.2 Zero Clearance. Where the duct is

listed for zero clearance to combustibles or is otherwise protected with a material or product listed for the purpose of reducing clearance to zero, the duct shall be permitted to exceed the contact limits of Section 507.4.7 without additional corrosion protection. [NFPA 96:4.4.3]

507.4.8 Clearance Between Duct and Interior

Surfaces. Clearances between the duct and interior surfaces of enclosures shall meet the requirements of Section 507.4 through Section 507.4.3.3. [NFPA 96:4.5]

507.5 Drawings. For cooking operations in buildings, a drawing(s) of the exhaust system installation along with

110 2025 CALIFORNIA MECHANICAL CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

EXHAUST SYSTEMS

copies of operating instructions for subassemblies and components used in the exhaust system, including electrical schematics, shall be kept on the premises and made available on request to the Authority Having Jurisdiction and maintenance persons. [NFPA 96:4.6.4]

507.6 Notification of Change. If required by the Authority Having Jurisdiction, notification in writing shall be given of any alteration, replacement, or relocation of any exhaust or extinguishing system or part thereof or cooking equipment.

[NFPA 96:4.7]

Satisfaction shall be provided to the Authority Having Jurisdiction that the complete exhaust system as addressed in this chapter is installed and operable in accordance with the approved design and the manufacturer’s installation instructions.

507.7 Pharmaceutical Compounding Exhaust Dis- charge. [OSHPD 1, 2, 3, 4 & 5] Exhaust discharge from fans serving the compounding suite shall extend at least 7 feet (2134 mm) above the roof and discharge vertically upward. Self-draining stacks or equivalent shall be used for rain pro- tection. Rain caps which divert the exhaust toward the roof shall be prohibited.

508.0 Type I Hoods.

508.1 Where Required. Type I hoods shall be installed at or above commercial-type deep-fat fryers, broilers, grills, hottop ranges, ovens, barbecues, rotisseries, and similar equipment that emits comparable amounts of smoke or grease in a food-processing establishment. For the purpose of this section, a food-processing establishment shall include a building or portion thereof used for the processing of food, but shall not include a dwelling unit.

Exceptions:

Frequently asked questions

Where in the CBC do I check whether my chemical quantities trigger Group H?

Start with § 307.1 and the maximum allowable quantities in Tables 307.1(1) and 307.1(2); if quantities exceed those amounts the space will be evaluated under Group H rules.

If my material is corrosive, do I follow just CBC tables or the Fire Code too?

Both. The CBC classifies and provides quantity triggers (Tables 307.1); § 414.1.2 directs you to use the Fire Code and Mechanical Code for material‑specific design (ventilation, cabinets, containers, relief devices).

Are sprinklered buildings allowed to store more hazardous material?

Yes — the CBC/Tables include footnotes that allow increases (commonly 100%) in allowable quantities where the building is protected by an approved automatic sprinkler system; read the table notes carefully.

Where are compressed‑gas specifics (cylinders, marking, securing) written?

The technical requirements for cylinder marking, securing, handling and referenced standards are in the California Fire Code (Chapter 53) — the CBC points you to those chapters for material details.

If I store cryogens outdoors, do CBC tables apply?

Yes — CBC tables include footnotes for outdoor control areas (often allowing higher quantities); the CBC also directs you to Fire Code Chapter 55 for container and pressure‑relief requirements.

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Related in the CBC

Where the CBC defers to the California Fire Code and other standards

Flammable and combustible liquids—CBC thresholds and control-area triggers

Material‑specific thresholds & cross-references (where CBC defers to other codes)

California Building Code

Compressed gases, corrosives and cryogenic fluids—where to find CBC requirements

What the code requires — 2‑4 sentences

Requirements in detail

High‑hazard classification (where to start)

Quantities and decision thresholds (short, decision‑relevant table)

How the CBC fits with the Fire and Mechanical Codes

Exceptions & special cases

Common mistakes

Worked example — lab storing muriatic (hydrochloric) acid

Related provisions (quick reference)

Code references

53 COMPRESSED GASES

58 FLAMMABLE GASES AND FLAMMABLE CRYOGENIC FLUIDS

2025 CBC Building Code

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