Appendix CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN

Note: The effective date of these standards shall be March 1, 2012 or ninety (90) days

after the corresponding maps are completed and readily available to the general public, whichever is the later date.

Table W301.2(1) Revise as follows:

Replace the Flood Hazards cell in table as follows:

FLOOD HAZARDS

CK101 General. The provisions of this section shall apply to new construction, changes of use or repair and to substantial improvement and restoration of substantial damage of buildings in areas protected by the facilities of the Central Valley Flood Protection Plan, as established in Table R301.2, where flood levels are anticipated to exceed three feet for the 200-year flood event. Except as specifically required by this section, buildings and structures shall meet applicable provisions of this code.

Construction documents shall include the WSEL200 and the elevation(s) of the floor(s) and, as applicable, the elevation(s) and slopes of roofs, of the building or structure.

CK102 Definitions.

The following words and terms shall, for the purposes of this section, have the meanings shown.

AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN WHERE FLOOD LEVELS ARE ANTICI-

PATED TO EXCEED THREE FEET FOR THE 200-YEAR FLOOD EVENT. Geographical areas identified by the state as “Areas Protected by the Facilities of the Central Valley Flood Protection Plan where Flood Levels are Anticipated to Exceed Three Feet for the 200-Year Flood Event” in accordance with the Health and Safety Code Section 50465. Published data from the California Department of Water Resources can be obtained online at the following website: www.water.ca.gov/BuildingCodes.

Note: The facilities of the Central Valley Flood Protection Plan are identified in the following counties: Butte, Colusa, Fresno, Glenn, Lake, Madera, Merced, Plumas, Sacramento, San Joaquin, Solano, Stanislaus, Sutter, Tehama, Yolo and Yuba. Determination of addi- tional facilities is ongoing.

CENTRAL VALLEY. Any lands in the bed or along or near the banks of the Sacramento River and the San Joaquin River, and any of their tributaries or connected therewith, or upon any land adjacent thereto, or within any of the overflow basins thereof, or upon any land susceptible to overflow therefrom. The following counties and the incorporated municipalities within these counties, in whole or in part, are in the Central Valley: Alpine, Amador, Butte, Calaveras, Colusa, El Dorado, Fresno, Glenn, Lake, Lassen, Madera, Mariposa, Merced, Modoc, Napa, Nevada, Placer, Plumas, Sacramento, San Benito, San Joaquin, Shasta, Sierra, Siskiyou, Solano, Stanislaus, Sutter, Tehama, Tuolumne, Yolo and Yuba. A map that delineates the Central Valley can be obtained online at the following website: www.water.ca.gov/Building Codes.

EVACUATION LOCATION. A location no less than one (1) foot (0.30 meter) above the WSEL200 where occupants are expected to congre- gate pending evacuation and from which occupants may be evacuated during conditions of flooding, such as a space within the building that has an exit door or operable window; a deck, balcony, porch, rooftop platform or rooftop area; or combinations thereof.

FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN. The facilities referenced herein include the facilities of State Plan of Flood Control and other flood management facilities in the Central Valley evaluated under the Central Valley Flood Protection Plan, which will be completed in 2012 and updated every 5 years thereafter. The facilities of State Plan of Flood Control include the state and federal flood control works (levees, weirs, channels and other features) of the Sacramento River Flood Control Project described in Water Code Section 8350, and flood control projects in the Sacramento River and San Joaquin River watersheds authorized pursuant to Article 2 (commencing with Water Code section 12648) of Chapter 2 of Part 6 of Division 6 for which the Central Valley Flood Protection Board or the Department of Water Resources has provided the assurances of nonfederal cooperation to the United States, and those facilities identified in Water Code Section 8361.

ROUTE TO THE EVACUATION LOCATION. The path through and along which occupants move from the habitable areas of a building or structure that are below the WSEL200 to the evacuation location.

SUBSTANTIAL DAMAGE. Damage of any origin sustained by a structure whereby the cost of restoring the structure to its before- damaged condition would equal or exceed 50 percent of the market value of the structure before the damage occurred.

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APPENDIX CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN

SUBSTANTIAL IMPROVEMENT. Any repair, reconstruction, rehabilitation, addition or improvement of a building or structure, the cost of which equals or exceeds 50 percent of the market value of the structure before the improvement or repair is started. If the structure has sustained damage, any repairs are considered substantial improvement regardless of the actual repair work performed. The term does not, however, include either:

1. Any project for improvement of a building required to correct existing health, sanitary or safety code violations identified by the building official and that area the minimum necessary to assure safe living conditions. 2. Any alteration of a historic structure provided that the alteration will not preclude the structure’s continued designation as a historic structure.

WSEL200. The water surface elevation (WSEL) of the 200-year flood event that is identified by the state when it identifies areas that receive protection from the facilities of the Central Valley Flood Protection Plan.

CK103 Structural stability. Portions of buildings and structures that support evacuation locations shall be designed, constructed, connected and anchored to resist flotation, collapse or permanent lateral movement resulting from the hydrostatic loads anticipated during conditions of flooding anticipated for the 200-year flood event.

Exception: When one flood vent (minimum) is provided on two opposite sides of the building or structure that comply with Figure CK103.

Hydrostatic loads, based on the depth of water determined by the WSEL200 shall be determined in accordance with Chapter 5 of ASCE 7. Reduction of hydrostatic loads may be accomplished by allowing for the automatic entry and exit of floodwaters to minimize unbalanced loads. Such means shall be designed by a registered design professional and include, but are not limited to, openings, valves and panels designed to yield under load.

CK104 Evacuation Locations. An evacuation location and a route to the evacuation location shall be provided.

A route shall be allowed through any number of intervening rooms or spaces. Doors along the route shall be openable without the use of a key, lock, special knowledge or effort.

Evacuation locations shall provide a minimum gross floor area of 7 square feet (0.65 m [2] ) per occupant, based on the occupant load of the portions of the building that are below WSEL200. The area provided shall be adequate to accommodate the occupant load of the upper levels as well as the anticipated occupant load from the area below the WSEL200.

CK105 Space within the building. If the evacuation location is a space within a building, the evacuation location shall be provided with a means for occupants to be evacuated out of the building specified in Section CK105.1, CK105.2 or CK105.3. The means for occupants to be evacuated out of the building shall address the mobility of the occupants.

A minimum of one window shall be provided that meet the minimum size, mini- mum dimensions and operational constraints of Section R310. The number of such windows shall be appropriate for the occupancy or occupancies of the portions of the building that are below WSEL200.

Note: It is the intent of this section that windows be of sufficient number, sizes and dimensions to reasonably accommodate the needs and limitations of the occupants of the building. Reasonable judgment in the application of this requirement must be exer- cised by the building official.

Exterior doors to decks, balconies and porches shall be sized in accor- dance with Section R311.

The means of escape to rooftops shall be permitted to be provided by a stairway, ramp, alternating tread device, fixed ladder or other means approved by the building official.

CK106 Decks and balconies that are evacuation locations. Decks and balconies that have finish floors no less than one (1) foot (0.30 meter) above the WSEL200 shall be permitted to be evacuation locations. When a deck or balcony used as an evacuation location is not at the same level as a floor within the building, it shall be permitted to be accessed by a stairway, ramp, alternating tread device, fixed ladder or other means approved by the building official.

Decks and balconies that are evacuation locations shall be designed for the live load required in Table R301.5.

Evacuation routes to decks and balconies that are evacuation locations shall be permitted to be provided by a stairway, ramp, alternating tread device, fixed ladder or other means approved by the building official.

CK107 Rooftop evacuation locations. Rooftop evacuation locations shall be permitted to include rooftop platforms and rooftop areas provided that they are no less than one (1) foot (0.30 meter) above the WSEL200. A minimum horizontal distance of 3 feet (0.91 meter) shall be provided between the lower edge of the rooftop evacuation location access point and the evacuation location lower perimeter.

A rooftop platform shall be provided if the roof covering materials are: 1. Clay tile, concrete tile, slate shingles, wood shingles or wood shakes and the roof slope is three units vertical in 12 units hori- zontal (25 percent slope) or greater. 2. Metal roof panels or metal roof shingles and the roof slope is one unit vertical in 12 units horizontal (8.33 percent slope) or greater.

Roof areas that are rooftop evacuation locations and roofs that support rooftop platforms that are evacua- tion locations shall be designed for the roof live load required for the occupancy as required in CBC Table 1607.2.

Evacuation routes to rooftop evacuation locations shall be permitted to be provided by a stairway, ramp, alternating tread device, fixed ladder or other means approved by the building official.

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APPENDIX CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN

The perimeter of rooftop evacuation locations shall be protected by:

1. Guards per Section R312 if a rooftop platform is provided; or

2. A railing that is 12 inches (305 mm) in height if a sloped roof is provided.

A separation of 48 inches shall be provided between an evacuation location and any mechanical equipment, photovoltaic system, utility service drop or other utility line. Electrical service lines shall not pass over evacu- ation locations.

CK108 Attics that are evacuation locations. Attics that have finish floors no less than one (1) foot above the WSEL200 shall be permitted to be evacuation locations.

When an attic is used as an evacuation location, the minimum headroom of the required area shall be 30 inches (762 mm) with 50 percent of the required area having a headroom of 60 inches (1524 mm).

The required area of the evacuation location shall be solidly sheathed.

Attic areas that are used as evacuation locations shall be designed for the attic with limited live load requirement in Table R301.5.

In Group R-3.1 occupancies that are subject to the requirements of Chap- ter 11A or 11B, such requirements shall apply to the evacuation routes to attics. In Group R-3 occupancies, evacuation routes to attic evacuation locations shall be permitted to be provided by a stairway, ramp, alternating tread device, fixed ladder or other means approved by the building official.

The means of escape from attics shall comply with Section CK105.

CK109 Alternate means of protection.

Requests for approval to use an alternative means of protection shall be made in writing to the building official by the owner or the owner’s authorized representative. The request shall be accompa- nied by a full statement of the conditions and sufficient evidence that the proposed alternate means of protection provides reasonable protection to occupants. The building official shall require the owner to obtain a written statement from the applicable emergency management authority regarding plans and processes related to notification of anticipated conditions of flooding, warn- ings, evacuations and other pertinent conditions relative to the proximity of nearby levees. The building official shall also require the owner to obtain a written statement and findings from the entity that has jurisdiction over the management, maintenance, monitor- ing and control of flood protection works in the vicinity of the location of the owner’s property, such statement shall comment on the viability of the proposed alternate means of protection. The building official may request written statements from the Central Valley Flood Protection Board, the California Department of Water Resources and the California Emergency Management Agency.

Approval of a request for use of an alternative means of protection made pursuant to these provisions shall be limited to the particular case covered by the request and shall not be construed as establishing any precedent for any future request except in substantially equivalent situations.

Note: Contact information for the California Department of Water Resources and the Department’s Directory of Flood Officials, which includes levee and reclamation district boundary maps, is available on-line at the following website: www.water.ca.gov/ BuildingCodes. The Department of Water Resources Building Code Project Engineer can be contacted at 916-574-1451. The Central Valley Flood Control Board Chief Engineer can be contacted at 916-574-0609. The California Emergency Management Agency Inland Region Program Manager can be contacted at 916-845-8488.

When a request for an alternate means of protection has been denied by the building official, the applicant may file a written appeal with the board of appeals. In considering such appeal, the board of appeals may provide additional information to, and request additional written statements from the Central Valley Flood Protection Board, the California Department of Water Resources and the California Emergency Management Agency. If such additional written statements are provided, the board of appeals shall consider those statements.

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APPENDIX CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN

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APPENDIX CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN

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Concrete Capillary break R506.2.3.1 Compressive strength R402.2 Floors (on ground) R506 Tile (roof) R905.3 Weathering Figure R301.2(1), R402.2 Construction

3D-printed Appendix BM Cavity wall masonry R608 Cob Appendix BK Extended plate walls Appendix BN Flood-resistant R306

Floors Chapter 5 Footings R403 Foundation material R402

Foundation walls R404

Foundations Chapter 4 Hemp-lime Appendix BL Masonry R606, R607, R608, R610 Pollutant control R340 Roofs Chapter 8 Steel framing R505, R603, R804 Strawbale Appendix BJ Straw-clay Appendix BI Walls Chapter 6 Waste R334.1 Wood framing R502, R602, R802 Construction Documents R106, R306.3.9

Court Emergency escape and rescue openings R319.1, R319.2.4 Means of egress R318.1 Natural light R325.1.1 Covering Exterior R703

Interior R702 Roof Chapter 9 Wall Chapter 7 Crawl Space R408

Access R408.4

Damper Fireplace R1001.7.1 Dampproofing R406 Day Care Appendix BD Defined R202 Large family day-care homes R336 Dead Loads R301.4

Decay Protection against R304 Deck

Attachment R318.5 Supported by exterior wall R507 Wood/plastic composite boards R507.2.2

Definitions Building R202 Mechanical system R202 Plumbing R202 Design Criteria R301 Alternative provisions R301.1.1 Application R301.1 Climatic and geographic R301.2 Dead load R301.4

Deflection R301.6 Engineered design R301.1.3

Accessibility R322 Accessory Dwelling Unit R202 Authority to Enforce Automatic Fire Sprinkler Systems 1.8.9.1, R313.2 Accessory Structure Elevations R306.3.2

Energy R330.5 Exterior walls R302.1

Scope R101.2 Addition (see also Existing Buildings) Carbon monoxide alarms R311.2.2 Change of occupancy R110.1 Construction R302.2.3

Frost protection R403.1.4.1 Scope R101.2, R102.6.1 Smoke alarms R310.2.2 Address (Site) R308 Administration, California Chapter 1, Division 1

General 1.1 Dept. of Housing and Community Development 1.8 Office of the State Fire Marshal 1.11 Administration, Division II Chapter 1 Applicability R102 Certificate of occupancy R110 Construction documents R106 Department of building safety R103 Duties and Powers R104

Fees R106

Inspections R109 Means of appeals R112 Permits R105, R105.5.1 Purpose R101.3 Service utilities R111 Stop work order R114 Temporary structures and uses R107 Violations R113 Aging-in-place Design and Fall Prevention R327

Doorbell buttons R327.1.4 Electrical receptacle outlet, switch and control heights R327.1.2 Interior doors R327.1.3 Reinforcement for grab bars R327.1.1 Allowable Spans Of floor joists R502.3, R505.3.2 Of headers R602.7, R603.6 Of rafters and ceiling joists R802.4, R802.5, R804.3.1, R804.3.2 Alternate Materials (see Materials) R104.11 Alterations (see Existing Buildings) Anchor Bolts R403.1.6

Appeal Board of 1.8.8, Appendix AA Means of 1.8.8, R112 Appliance Flue area R1003.14

Seismic constraint R301.2.2.10

Area Flue (appliances) R1003.14 Flue masonry R1003.15 Mezzanines R314.3

Room, minimum R312 Sleeping lofts R315.1, R315.2, R315.4 Area Wells R319.4

INDEX

Attic

Access R807

Habitable R316 Height R313.1.2 Ventilation R806 Automatic Sprinkler Systems R101.2, R309 Automotive Lifts R317.7

Backfill

Placement R404.1.7, R404.2.3, R404.2.4, R406.3.3, R406.3.4

Basements

Alterations R319.7 Ceiling height R313 Egress R318.4 Emergency escape and rescue openings R319.6 Bathroom R313.1, R326, R327 Exhaust fan R325.2.1

Bathtub R326.1, R327 Enclosure R324.3.1, R324.4.5, R325.2 Finish R327.2 Space required R327.1 Board of Appeals (see Means of Appeal) Building Official Duties and powers R104 Built-Up Roofing (see Roofing)

Carbon Monoxide Alarms R311

Care Facilities R101.2, R322.3 Carports R317.2, R317.3 Ceiling Finishes R302.9, R805 Height R313 Certificate of Occupancy R110 Change of Occupancy R110.1 Emergency escape and rescue openings R319.5, R319.7.1 Chases R606.8

Child Care

Defined R202 Chimneys Caps R1003.9.1 Clearance R1003.18 Corbeling R1003.5 Crickets R1003.20 Design (masonry) R1003.1 Factory-built R1005 Fireblocking R1003.19 Fireplaces Chapter 10 Flue area R1003.14, R1003.15 Flue lining R1003.11 Load R1003.8 Multiple flue R1003.14 Rain caps R1003.9.3 Spark arrestors R1003.9.2 Termination R1003.9

Wall thickness R1003.10

Clay Tiles R905.3

Cleanout Masonry chimney R1003.17 Climate Types R301.2 Climate Zones R202, R702.7.3, Table R702.7(5) Columns R407

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INDEX

Live load R301.5

Nominal sizes R301.8

Roof load R301.6

Seismic R301.2.2

Snow loads R301.2.3 Story height R301.3 Sunrooms R301.2.1.1.1

Wind R301.2.1

Doors

Egress R318.2 Exterior R318.3, R609 Glazing R324 Draftstopping R302.12, R502.13 Drainage Foundation R405 Site drainage R300 Ducts

Defined R202 Dwelling-garage wall and ceiling penetration R302.5.2 System, definition R202 Dwelling Unit Separation R302.2, R302.3 Sprinklers (see Automatic Sprinkler System)

Electric Vehicle Charging Stations R317.6 Elevator R323.1, R323.3 Emergency Escape and Rescue Openings R319

Additions R319.6

Area wells R319.4 Bars, grilles, covers and screens R319.4.4

Basements, existing R319.7 Dimensions R319.2

Doors R319.3

Replacement window R319.5 Under decks and porches R319.2.4 Where required R319.1 Window fall protection R321.2 Emergency Housing Appendix CJ Energy Storage Systems R328 ESS vehicle impact protection Figure R330.8.1 Maximum aggregate ratings of ESS Table R330.5 Protection from impact R330.8 Toxic and highly toxic gas R330.12 Entry 1.8.5, R104.4 Existing Buildings Appendix BO Administrative R101.2, R102.6, R105.1, R105.8, R106.2, R113.1, R113.2 Basements R313.1.2, R319.7 Carbon monoxide alarms R311.2.2, R311.5, R311.6 Flood R104.3.1

Smoke alarms R310.2.2, R310.6 Stairways R318.7.9 Windows, replacement R319.5 Exterior Balconies and elevated walking surfaces R106.1.6

Covering R703 Insulation finish systems R703.9 Lath R703.7.1

Plaster R703.7 Exterior Insulation and Finish Systems (EIFS) 703.9

Exterior Wall

Construction R302.1

Fire-resistance rating R302.1

Factory Built Chimneys R1005 Fireplace stoves R1005.3 Fireplaces R1004 Fastening Table R602.3(1) Fees, Permit R108 Finishes Flame spread and smoke density R302.9 For ceilings R805 Interior R302.9, R311, R702 Fire Sprinkler System (see Automatic Sprinkler System) Ceiling configurations R309.3.4.1.1, R309.3.4.1.2, R309.3.4.1.3 Flow rate R309.3.4.1 Fireblocking Barrier between stories R302.11,

R602.8 Chimney R1003.19 Fireplace R1001.12 Fireplaces Chapter 10 Clearance R1001.11 Corbeling R1001.8 Factory-built R1004 Fireblocking R1001.12 Walls R1001.5

Fire-Resistant Construction R302 Draftstopping R302.2 Dwelling-garage fire separation R302.6 Dwelling-garage opening and penetration R302.5 Exterior walls R302.1 Fireblocking R302.11 Floors R302.13

Foam plastics R302.8 Insulation R302.10, R302.14 Penetrations R302.4

Townhouse separation R302.2 Two-family dwellings R302.3 Under-stair protection R302.7 Wall and ceiling finishes R302.9 Fire-Separation Distance Exterior walls and wall projections R302.1 Ground-mounted photovoltaic systems R329.7, R329.8 Fixtures

Clearance R327.1

Flood protection R306.1.6 Plumbing fixture, general R326, R327 Flame Spread Index R302.10, R302.9 Flashing R703.4, R703.8.5, R903.2, R905 Flood Protection Plan Areas protected by the facilities of Central Valley Appendix CK Flood-Resistant Construction

General and structural R301.2.4, R306 Floors

Bathtub and shower R327.2 Concrete (on ground) R506 Loads R301, R501.2 Steel framing R505 Treated wood (on ground) R504

Wood framing R502 Flue

Area R1003.14, R1003.15 Lining R1003.11, R1003.12 Multiple R1003.13 Foam Plastics R303 Footings R403 Foundations Chapter 4 Cripple walls R602.10.9, R602.11.2, R602.9

Frost protection R403.1.4.1 Inspection R109.1.1 Walls R404

Frame

Inspection R109.1.4 Frost Protection R507.3, R507.3.3, R1001.2 Fuel Cell Power System, Stationary R322 Fuel-Burning Appliances (see Appliances)

Garbage Disposal (see Food-Waste Disposers) Garages R317, R330.8.1 Electric vehicle charging infrastructure R317.6 Protection of Energy Storage Systems R330.8

Generators R331

Girders R502.5 Glazing Aggregate area R325.1 Greenhouses R324.6.6 Protection of openings R301.2.1.2 Safety glazing at hazardous locations R324

Site-built R324.5 Skylights and sloped glazing R324.6 Grade

Of lumber R502.1.1, R602.1.1, R802.1.1 Grade Plane R101.2, R301.2.2.7, R316.3 Ground Floors (on ground) R504, R506 Guards or Guardrail R321, R324.4.4 Exterior R507.10 Guestroom (see Lodging House) Gypsum Board and Gypsum Panel Products R702.3

Hallways R318.6 Hand Shower (see Shower) Handrails R318.7.8, R318.8.3, R320, R324.4.4 Alternating tread devices R318.7.12.2 Ship’s ladders R318.7.13.2 Hazardous Location R324

Headers

SIP R610.8

Steel R603.6

Wood R602.7

Hearth R1001.9

Extension R1001.10, R1001.9

Heaters

Masonry R1002 Heating Required R325.8 Height Ceiling R313 Mezzanines R314.2 Sleeping lofts R315.3 Hollow-Unit Masonry (see Masonry)

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INDEX

Roof shingles R905.4 Methods Water distribution pipe sizing Appendix CF Mezzanines (see also Sleeping Lofts) R314, R321 Modifications R104.2.3 Moisture Content, Building Materials R109.1.4.1

Moisture Control R702.7

Mortar

Joints R606.3.1 Multiple Flues R1003.13

Natural Light (see Light) Natural Ventilation (see Ventilation) Notching Steel joists R505.2.5, R505.3.5, R804.2.5, R804.3.3 Steel studs R603.2.6, R603.3.4 Wood joists R502.8, R802.7.1 Wood studs R602.6 Wood top plates R602.6.1

Opening Protection R302.5

Parapets R302.2.2, R606.4.4 Particleboard

Floor R503.3

Walls R605 Patio Covers Appendix BF Penetrations R302.4, R302.5 Permits 1.8.4, R105, R105.5.1 Permit fees Appendix AB Photovoltaic Panel Systems R907 Ground-mounted definition R202

Photovoltaic Support Structure, Elevated R202, R324.8, R324.8.1, R324.8.2 Piers R606.7

Masonry R404.1.9 Planning Building Chapter 3 Plans R106

Plaster

Exterior R703.7

Interior R702.2

Platform Lifts R323.2, R323.3 Plumbing Fixture clearances R327

Fixtures R326, R327 Inspection 109.1.2 Requirements and definitions R202 System, definition R202 Plywood Application R703.5 Materials, walls R604

Precast Concrete

Footings R403.4 Foundation material R402.3.1

Foundation walls R404.5

Protection Against decay and termites R304, R305 Against radon Appendix BE Public Way R318.1, R319.1 Purlins R802.4.5

Hot Tubs (see Swimming Pools) R324.3.1, R328 Hurricane (see Storm Shelter)

Impact Protective System Energy storage system R330.8 Flood R306.1.4.2, R306.3.3 Human impact R324.3 Storm shelter R307.2.1

Windborne debris R301.2.1.2 Indirectly Conditioned Space (see Conditioned Space) Inflatable Amusement Device

Defined R202

Inlet To masonry chimneys R1003.16 Inspection On-site 1.8.4, R109.1 Insulation

Above-deck R906 Flame spread R302.10 Foam plastic R303 Interior

Lath R702.2.3

Other finishes R702.5

Plaster R702.2 Wall covering Chapter 7 Intermodal Shipping Container R301.1.4

Joist

Bearing R502.6, R606.6.3.1

Kitchen Height and area R312, R313 Sinks R326

Ventilation R325.1.2

Labeling Garage doors R609.4.1 Ladders

Ships ladders R318.7.13 Sleeping lofts R315.5.3 Landings (see also Stairways, Ramps and Doors) R318.3, R318.3.1, R318.3.2, R318.7.6, R318.8.2, R321, R324.4.7, R325.6, R325.7 Lateral Support R502.7, R606.6.4, R607.5.2 Lath

Exterior R703.7.1

Interior R702.2.3

Lavatories R326.1

Clearances R327 Liability R104.8 Light R325 Lighting Adjoining rooms R325.1.3 Bathrooms R325.2

Exterior stairs R325.7

Habitable rooms R325

Interior stairs R325.6 Limited-Density Owner-Built Rural Dwellings Alternative provisions R301.1.1.1 Definition R202 Lining Flue R1003.11, R1003.12 Lintel R606.10, R608.8, R703.8.3, R1001.7 Liquid Fuel R202 Live Loads (see Loads)

Live/work Unit R101.2 Accessibility R322.2 Loads Chimneys R1003.8 Components and Cladding (see Wind Loads) Figure R301.2.1, Table 301.2.1(1), Table 301.2.1(2) Dead load R301.4 Flood (see Flood-Resistant Construction) R301.2.4 Live load R301.5, R301.7 Roof R301.6 Seismic risk map (see Seismic Loads) Figure R301.2.2.1(1), Figure R301.2.2.1(2), Figure R301.2.2.1(3), Figure R301.2.2.1(4), Figure R301.2.2.1(5), Figure R301.2.2.1(6), Figure R301.2.2.1(7) Snow load map (see Snow Loads) Figure 301.2(3) Wind speed map (see Wind Loads) Figure R301.2(2) Lodging House R101.2, R322.1 Lumber

Grade R502.1.1, R602.1.1, R802.1.1

Maintenance R102.6, R303.5.3, R303.5.4 Energy R330.11 Masonry Anchorage R606.11 Cavity wall R606.13 Chases R606.8

General R606

Hollow unit R606.13.1.2, R606.3.2.2 Inspection R109.1.4 Seismic requirements R606.12 Veneer R703.8

Veneer attachment R703.3

Materials

Alternative 1.8.7, R104.2.2 Combustible R1001.11, R1001.12, R1003.18, R1003.19 For flue liners R1003.11

For hearth extension R1001.9 For siding R703.5 Means of Appeal R112 Board of appeals Appendix AA Means of Egress R318 Attachment of landings, decks, balconies and stairs R318.5

Door R318.2 Floors and landings at exterior doors R318.3 Hallways R318.6 Mezzanines R314.4

Ramps R318.8 Sleeping lofts R315.5 Stairways R318.7 Vertical egress R318.4 Mechanical

Inspection R109.1.2 Membrane Polyethylene R504.2.2, R506.3.3 Waterproofing R406.2 Water-resistive R703.2

Metal Roof panels R905.10

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INDEX

Purpose R1.1.2, R101.3

Radon Control methods Appendix BE Rafters

Grade of lumber R802.1

Spans R802.1.1, R802.4.1 Ramps R318.8 Glazing R324.4.5 Guards R321

Handrails R318.8.3, R320 Relocation (see Existing Buildings) Repair (see Existing Buildings) Resistant Siding Material (see Materials) Ridge Board R802.4 Roof

Coverings R905 Coverings fire hazard severity zones R902.1.1

Drainage R903.4 Fire classification R902 Flashing R703.4, R903.2, R905 Materials R904 Reroofing R908 Rooftop-mounted solar energy systems R329.3, R329.6 Steel framing R804 Vents in the WUI R806.1.1 Wood framing R802 Roofing Built-up R905.9 Liquid-applied coating R905.14 Modified bitumen R905.11 Sprayed polyurethane foam R905.13 Thermoplastic single-ply R905.13 Thermoset single-ply R905.12 Room Area, height and dimensions R312, R313

Minimum Sizes R312

Sanitation R326

Seismic Loads

Design criteria R301.1, R301.2.2, R301.3

Service Utilities R111

Shakes

Wood R702.6, R703.6, R905.8 Shingle Asphalt shingles R905.2 Metal R905.4

Slate R905.6

Wood R905.7 Ship’s Ladders (see Ladders) R318.7.13 Shower R326.1, R327 Compartment R327.2 Finishes R327.2 Glazing R324.3.1, R324.4.5 Space required R327.1 Shutoff Valve (see Valves) Siding Exterior coverings R703 Sinks (see also Lavatories) R326.2 Site

Address R308

Preparation R408.5, R504.2, R506.3 Size

Of rooms R312 Skylights R324.6

Slate Shingles R905.6 Sleeping Lofts R315 Smoke Alarms R310

Smoke-Developed Index R302.10, R302.9 Snow Loads R301.1, Figure R301.2(3) Decks R507.1, R507.5, R507.6 Floors R502.3.3, R505.1.1 Foundation R403.1

Roof R301.6, R329.4.1.1, R802.10.2.1, R802.4.1, R804.3.2.1 Walls R602.3.1, R602.7, R603.3.2 Soffit R704

Fiber-cement R704.2.2, R704.3.2 Hardboard R704.2.3, R704.3.3 Vinyl R704.2.1, R704.3.1 Wood R704.2.4, R704.3.4 Solar Energy Systems R329 Building-integrated photovoltaic systems R329.5 Ground-mounted photovoltaic systems R329.8 Photovoltaic systems R329.3 Roof access and pathways R329.6 Rooftop-mounted photovoltaic systems R329.3 Sound Transmission Appendix BG Spans Steel (allowable) R505.3.2, R804.3.2.1 Wood (allowable) R502.3, R802.5 Sprinkler (see Automatic Sprinkler System) Stairways R318.7 Alternating tread devices R318.7.12 Bulkhead enclosure R318.7.11.2 Glazing R324.4.6 Guards R321

Handrails R318.7.8, R320 Headroom R318.7.2

Illumination R318.7.10, R325.6, R325.7 Landings for R318.7.6 Nosings R318.7.5.3 Ship’s ladders R318.7.13 Sleeping lofts R315.5.2 Spiral R318.7.11 Treads and risers R318.7.5, R318.7.5.4 Vertical egress R318.4 Vertical rise R318.7.3 Walking surface slope R318.7.7 Walkline R318.7.4

Width R318.7.1

Winder treads R318.7.5.2.1

Standards Appendix CD, Chapter 44 Stationary Engine Generators R329 Stationary Fuel Cell Power Systems R330 Steel

Fireplace units R1001.5.1 Floor construction R505 Roof-ceiling construction R804 Walls R603

Stop Work Order R114 Storm Shelters R106.1.5, R323 Story Above Grade Plane R101.2, R301.2.2.7, R316.3 Structural Insulated Panel (SIP) R610 Studs

Spacing R602.3.1 Steel R603.2, R603.3 Wood R602.2, R602.3 Sunrooms R301.2.1.1.1, R325.1.2

Support Decks R507.9.1.2 Floor joists R502.6, R505.3.2 Masonry chimneys R1003.2, R1003.3, R1003.4

Temporary Structures R107 Termination Of chimneys R1003.9 Termites Infestation probability map Figure R305.4 Protection R305 Thermal Resistance (see R -Value) Thermal Transmittance (see U -Factor) Ties

Veneer R703.8.4

Tile Shingles (clay and concrete) R905.3 Tiny Houses Appendix BB Toddler

Defined R202 Toilet (see Bathroom and Water Closets) Tornado (see Storm Shelters) Townhouse and Townhouse Unit

Parapet construction R302.2.5 Scope R101.2 Separation R302.2 Structural independence R302.2.6 Trusses

Steel R505.1.3, R804.3.6 Wood R502.12, R802.10 Tubular Daylighting Device (TDD) (see Skylights) Two-Family Dwellings R302.3

Under Floor

Space R408

Vapor Retarders R702.7 Capillary break R506.2.3.1 Under floor R408.8 Vehicular Gates Appendix BH Veneer

Masonry R703.7 Ventilation Adjoining rooms R325.1.3 Bathroom and kitchen R325.2

Habitable rooms R325.1

Roof R806

Under floor R408.1 Venting (Mechanical) Chimney and vent connectors R1006 Fireplace R1006 General R325.3

Violations R113 Visible Transmittance (VT)

Wall Furnace (see Appliance) Wallboard (see Gypsum) Walls

Bathtub compartments R327.2 Bracing, steel R603.9 Bracing, wood R602.10 Construction Chapter 6 Covering Chapter 7 Crawl space R202 Cripple R602.9

INDEX-4 2025 CALIFORNIA RESIDENTIAL CODE

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INDEX

Deflection R301.7

Exterior, defined R202 Exterior covering R703 Finishes R327.2, R702 Fireplace R1001.5 Foundation R404 Insulating concrete form R608.3, R608.4, R608.5.3 Steel framing R603 Structural insulated panels (SIP) R610 Thickness, masonry chimneys R1003.10 Wood framing R602 Waste

Construction waste R334

Water Closet R326.1, R327 Clearances for R327.1 Waterproofing And dampproofing R406 Wells (see Individual Water Supply) Whirlpool Bathtubs R324.3.1, P2720 Wind

Design criteria R301.2, R301.2.1 Speed maps Figure R301.2(2) Window R609 Emergency Escape and Rescue Openings R319, R321.2.2 Fall protection R321.2 Glazing R324 Light and ventilation R325 Opening limiting devices R321.2.2 Wood

Floor construction R502

Foundation walls R404.2 Protection against decay R304 Roof-ceiling construction R802 Shakes R905.8 Shingles R905.7 Trusses R502.12, R802.10 Walls R602

Yard R318.1, R319.1, R319.2.4, R325.1.1

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INDEX-6 2025 CALIFORNIA RESIDENTIAL CODE

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HISTORY NOTE APPENDIX

California Code of Regulations, Title 24, Part 2.5

HISTORY:

For prior code history, see the History Note Appendix to the California Residential Code, 2022 Triennial Edition, effective January 1, 2023.

1. (HCD 07/24, SFM 05/24) – Adoption by reference of the 2024 International Residential Code with necessary amendments to become the 2025 California Residential Code, and repeal of the 2021 edition of the International Residential Code . Approved by the California Building Standards Commission on February 26, 2025, filed with Secretary of State on March 7, 2025, and effective on January 1, 2026.

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HIST-2 2025 CALIFORNIA RESIDENTIAL CODE

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