Referenced Standards and Appendices (Chapter 16 and Appendices A–E, Resource A)

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

• CEBC § 102.4 High relevance — show source text

  Chapter 14 is applicable to any building that is moved or relocated. This chapter is independent of any of the three compliance methods and focuses on the structural loads where the building is being relocated.

  Chapter 15 Construction Safeguards.

  Chapter 15 establishes specific regulations in order to minimize the risk to the public and adjacent property during construction. Additionally, this chapter addresses fire and life safety and means of egress during the construction process. This includes requirements for a site safety plan. This chapter is also consistent with Chapter 33 of the CBC and Chapter 33 of the California Fire Code (CFC).

  Chapter 16 Referenced Standards.

  Chapter 16 lists all of the product and installation standards and codes that are referenced throughout Chapters 1 through 15 and includes identification of the promulgators and the section numbers in which the standards and codes are referenced. As stated in Section 102.4, these standards and codes become an enforceable part of the code (to the prescribed extent of the reference) as if printed in the body of the code.

  Appendix A Guidelines for the Seismic Retrofit of Existing Buildings.

  Appendix A provides guidelines for upgrading the seismic resistance capacity of different types of existing buildings. It is organized into separate chapters which deal with buildings of different types, including unreinforced masonry buildings, reinforced concrete and reinforced masonry wall buildings, and lightframe wood buildings. This appendix includes its own referenced standards.

  Appendix B Supplementary Accessibility Requirements for Existing Buildings and Facilities.

  Chapters 11A and 11B of the CBC contain provisions that set forth requirements for accessibility to buildings and their associated sites and facilities for people with physical disabilities. Appendix B was added to address accessibility in construction for items that are not typically enforceable through the traditional building code enforcement process.

  Appendix C Guidelines for the Wind Retrofit of Existing Buildings.

  The purpose of Appendix C is to provide voluntary prescriptive alternatives for addressing the retrofit of buildings in high-wind areas. Currently, there are two chapters which deal with the retrofit of gable ends and the fastening of roof decks, Appendix Chapters C1 and C2, respectively. This appendix includes its own referenced standards.

  Appendix D Board of Appeals.

  Appendix D contains the provisions for appeal and the establishment of a board of appeals. The provisions include the application for an appeal, the makeup of the board of appeals and the conduct of the appeal process.

  Appendix E Temporary Emergency Uses.

  Appendix E is intended to provide guidance for designers, engineers, architects and fire and building officials on allowing temporary emergency uses of existing buildings with respect to the minimum code requirements. This appendix is a template or checklist that references the relevant code requirement of concerns.

  Resource A Guidelines on Fire Ratings of Archaic Materials and Assemblies.

  In the process of repair and alteration of existing buildings, based on the nature and the extent of the work, the CEBC might require certain upgrades in the fire-resistance rating of building elements, at which time it becomes critical for the designers and the code

  xiv 2025 CALIFORNIA EXISTING BUILDING CODE

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

  officials to be able to determine the fire-resistance rating of the existing building elements as part of the overall evaluation for the assessment of the need for improvements. These guidelines are based upon the Guideline on Fire Ratings of Archaic Materials published by the National Institute of Building Sciences (NIBS).

  2025 CALIFORNIA EXISTING BUILDING CODE xv

• CEBC § 1.1.11. High relevance — show source text

  Chapter 10 Change of Occupancy.

  The purpose of Chapter 10 is to address existing buildings that are subject to a change of occupancy. This chapter is an assembly of requirements to upgrade safety without having to comply fully as a new building. A change of occupancy classification is considered a change of occupancy, however, it will involve a higher level of regulation since the use of the building has made a more significant change.

  2025 CALIFORNIA EXISTING BUILDING CODE xiii

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

  Chapter 11 Additions.

  Chapter 11 provides the requirements for additions, which are considered new construction. The requirements focus on safely integrating the addition with the existing building. This includes issues such as limiting the overall height and area of the building where the addition is not separated by a fire wall.

  Chapter 12 Historic Buildings —Reserved

  Chapter 12 is not adopted by the State of California. Historic buildings and structures shall comply with Part 8, Title 24, California Code of Regulations.

  Chapter 13 Performance Compliance Methods.

  Chapter 13 allows for existing buildings to be evaluated to show that alterations or a change of occupancy, while not meeting new construction requirements, will provide a level of safety to demonstrate compliance. Provisions are based on a numerical scoring system involving 21 safety parameters where, when evaluated, such buildings must meet a minimum overall safety score.

  Chapter 13 is not adopted by the State of California but may be available for adoption by local ordinance, see Section 1.1.11. See Section 104.11 for consideration of alternative means of compliance.

  Chapter 14 Relocated or Moved Buildings.

  Chapter 14 is applicable to any building that is moved or relocated. This chapter is independent of any of the three compliance methods and focuses on the structural loads where the building is being relocated.

  Chapter 15 Construction Safeguards.

  Chapter 15 establishes specific regulations in order to minimize the risk to the public and adjacent property during construction. Additionally, this chapter addresses fire and life safety and means of egress during the construction process. This includes requirements for a site safety plan. This chapter is also consistent with Chapter 33 of the CBC and Chapter 33 of the California Fire Code (CFC).

  Chapter 16 Referenced Standards.

  Chapter 16 lists all of the product and installation standards and codes that are referenced throughout Chapters 1 through 15 and includes identification of the promulgators and the section numbers in which the standards and codes are referenced. As stated in Section 102.4, these standards and codes become an enforceable part of the code (to the prescribed extent of the reference) as if printed in the body of the code.

  Appendix A Guidelines for the Seismic Retrofit of Existing Buildings.

  Appendix A provides guidelines for upgrading the seismic resistance capacity of different types of existing buildings. It is organized into separate chapters which deal with buildings of different types, including unreinforced masonry buildings, reinforced concrete and reinforced masonry wall buildings, and lightframe wood buildings. This appendix includes its own referenced standards.

  Appendix B Supplementary Accessibility Requirements for Existing Buildings and Facilities.

  Chapters 11A and 11B of the CBC contain provisions that set forth requirements for accessibility to buildings and their associated sites and facilities for people with physical disabilities. Appendix B was added to address accessibility in construction for items that are not typically enforceable through the traditional building code enforcement process.

  Appendix C Guidelines for the Wind Retrofit of Existing Buildings.

• CEBC § 2.1.5 High relevance — show source text

  **
  HOURS| |ITEM
  CODE|MINIMUM
  DIMENSION|CONSTRUCTION DETAILS|LOAD|TIME|PRE-BMS-92|BMS-92|POST-BMS-92|POST-BMS-92|POST-BMS-92| |C-16-RC-1|16″|16″ square columns; gravel aggregate concrete
  (4550 psi); reinforcement: vertical, eight 13/8″
  rebars; horizontal,5/16″ ties at 6″ pitch 13/8″
  below column surface and5/16″ ties at 6″ pitch
  linking center rebars of each face forming a
  smaller square in column cross section.|237
  tons|1 hr|||7|1–3|1|

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-71

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 2.1.5—continued REINFORCED CONCRETE COLUMNS MINIMUM DIMENSION 16″ TO LESS THAN 18″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	MINIMUM DIMENSION	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	MINIMUM DIMENSION	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST-BMS-92	POST-BMS-92	POST-BMS-92
  C-16-RC-2	16″	16″ square columns; gravel aggregate concrete (3360 psi); reinforcement: vertical, eight 13/8″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 13/8″.	210 tons	2 hrs			7	2, 4–6	2
  C-16-RC-3	16″	16″ square columns; gravel aggregate concrete (3980 psi); reinforcement: vertical, four7/8″ rebars; horizontal,3/8″ ties at 6″ pitch; cover: 1″.	123.5 tons	2 hrs			7	2, 4, 7	2
  C-16-RC-4	16″	Reinforced concrete columns with 11/2″ concrete outside reinforcing steel; gross diam- eter or side of column: 16″; Group I, Column A.	—	9 hrs		1		8, 9	9
  C-16-RC-5	16″	Description as per C-16-RC-4; Group I, Column B.	—	6 hrs		1		8,

• CEBC § 91.5 High relevance — show source text

  |61
  tons|1 hr
  26
  min|||7|1|11/4| |C-11-RC-14|11″|11″ square columns; gravel aggregate
  concrete (4140 psi); reinforcement:
  vertical, four 11/4″ rebars; horizontal,
  3/8″ ties at 71/2″ pitch; steel mesh around
  reinforcement; cover: 11/2″.|61
  tons|3 hrs
  9 min|||7|1|3| |C-11-RC-15|11″|11″ square columns; slag aggregate
  concrete (3690 psi); reinforcement:
  vertical, four 11/4″ rebars; horizontal,
  3/8″ ties at 71/2″ pitch; cover: 11/2″.|91
  tons|2 hrs|||7|2–5|2| |C-11-RC-16|11″|11″ square columns; limestone aggregate
  concrete (5230 psi); reinforcement:
  vertical, four 11/4″ rebars; horizontal,
  3/8″ ties at 71/2″ pitch; cover: 11/2″.|91.5
  tons|3 hrs
  41
  min|||7|1|31/2| |C-11-RC-17|11″|11″ square columns; limestone aggregate
  concrete (5530 psi); reinforcement:
  vertical, four 11/4″ rebars; horizontal,
  3/8″ ties at 71/2″ pitch; cover: 11/2″.|91.5
  tons|3 hrs
  47
  min|||7|1|31/2|

  RESOURCE A-68 2025 CALIFORNIA EXISTING BUILDING CODE

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 2.1.2—continued REINFORCED CONCRETE COLUMNS MINIMUM DIMENSION 10″ TO LESS THAN 12″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST- BMS-92	POST- BMS-92	POST- BMS-92
  C-11-RC-18	11″	11″ square columns; limestone aggregate concrete (5280 psi); reinforcement: verti- cal, four 11/4″ rebars; horizontal,3/8″ ties at 71/2″ pitch; cover: 11/2″.	91.5 tons	2 hrs			7	2–4, 6	2
  C-11-RC-19	11″	11″ square columns;

• CEBC § 2.1.2 High relevance — show source text

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-67

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 2.1.2—continued REINFORCED CONCRETE COLUMNS MINIMUM DIMENSION 10″ TO LESS THAN 12″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST- BMS-92	POST- BMS-92	POST- BMS-92
  C-10-RC-3	10″	10″ square columns; aggregate concrete (5370 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	46.5 tons	2 hrs			7	2, 3, 11	2
  C-10-RC-4	10″	10″ square columns; aggregate concrete (5206 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	46.5 tons	2 hrs			7	2, 7	2
  C-10-RC-5	10″	10″ square columns; aggregate concrete (5674 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	46.7 tons	2 hrs			7	1	2
  C-10-RC-6	10″	10″ square columns; aggregate concrete (5150 psi); reinforcement: vertical, four 11/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	66 tons	1 hr 43 min			7	1	13/4
  C-10-RC-7	10″	10″ square columns; aggregate concrete (5580 psi); reinforcement: vertical, four 1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 11/8″.	62.5 tons	1 hr 38 min			7	1	11/2
  C-10-RC-8	10″	10″ square columns; aggregate concrete (4080 psi); reinforcement: vertical, four 11/8″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 11/8″.	72.

• CEBC § 25.4 High relevance — show source text

  |See
  Note 16|45 min|||43|16|3/4| |F/C-4-RC-45|4″|2500 psi concrete;5/8″ cover; fully
  restrained at test.|See
  Note 16|40 min|||43|16|2/3| |F/C-4-RC-46|4″|2000 psi concrete;3/4″ cover; free or
  partial restraint at test.|See
  Note 16|1 hr
  15 min|||43|16|11/4| |F/C-5-RC-47|5″|2500 psi concrete;3/4″ cover; fully
  restrained at test.|See
  Note 16|1 hr|||43|16|1| |F/C-5-RC-48|5″|2000 psi concrete;3/4″ cover; free or
  partial restraint at test.|See
  Note 16|1 hr
  30 min|||43|16|11/2| |F/C-6-RC-49|6″|2500 psi concrete; 1″ cover; fully
  restrained at test.|See
  Note 16|1 hr
  30 min|||43|16|11/2| |F/C-6-RC-50|6″|2000 psi concrete; 1″ cover; free or partial
  restraint at test.|See
  Note 16|2 hrs|||43|16|2|

  For SI: 1 inch = 25.4 mm, 1 foot = 305 mm, 1 pound per square inch = 0.00689 MPa, 1 pound per square foot = 47.9 N/m [2] .

  Notes:

  1. British test.

  2. Failure mode—local back face temperature rise.

  3. Tested for Grade “C” (2-hour) fire resistance

  4. Collapse imminent following hose stream.

  5. Failure mode—flame thru.

  6. Void formed with explosive force and report.

  7. Achieved Grade “B” (4-hour) fire resistance (British).

  8. Failure mode—collapse.

  9. Test was run to 2 hours, but specimen was partially supported by the furnace at 1 [1] / 4 hours.

  10. Failure mode—average back face temperature.

  11. Recommended endurance for non-load-bearing performance only.

  12. Floor maintained load-bearing ability to 2 hours at which point test was terminated.

  13. Test was run to 3 hours at which time failure mode 2 (above) was reached in spite of crack formation at 29 minutes.

  14. Tested for Grade “A” (6-hour) fire resistance.

  16. Load unspecified.
  17. Total assembly thickness 5 [1] / 2 inches. Three-inch thick blocks of molded excelsior bonded with Portland cement used as inserts with 2 [1] / 2 -inch cover (concrete) above blocks and 3 / 4 -inch gypsum plaster below. Nine-inch-wide ribs containing reinforcing steel of unspecified size interrupted 20-inch-wide segments of slab composite (i.e., plaster, excelsior blocks, concrete cover).

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-95

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  FIGURE 3.2 FLOOR/CEILING ASSEMBLIES—STEEL STRUCTURAL ELEMENTS

  10

  5

  0

• CEBC § 1.11. Medium relevance — show source text

  41—2023|X|||X|X|||X|X|X|X|X||X|X|||||||||| |ASTM A615—15 22||||||||||X||||||||||||||| |ICC A117.1—2017||||†|†|†||||||||||||||||||| |ICC CBC—25||||||||||X||||||||||||||| |NFPA 72—24|||X||||||||||||||||||||||

  The state agency does not adopt sections identified with 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.

  2025 CALIFORNIA EXISTING BUILDING CODE 16-1

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

  16-2 2025 CALIFORNIA EXISTING BUILDING CODE

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

  16 REFERENCED STANDARDS

  User notes:

  About this chapter: This code contains numerous references to standards that are used to regulate materials and methods of construction. Chapter 16 contains a comprehensive list of all standards that are referenced in the code, including the appendices. The standards are part of the code to the extent of the reference to the standard. Compliance with the referenced standard is necessary for compliance with this code. By providing specifically adopted standards, the construction and installation requirements necessary for compliance with the code can be readily determined. The basis for code compliance is, therefore, established and available on an equal basis to the building code official, contractor, designer and owner.

  This chapter lists the standards that are referenced in various sections of this document. The standards are listed herein by the promulgating agency of the standard, the standard identification, the effective date and title, and the section or sections of this document that reference the standard. The application of the referenced standards shall be as specified in Section 102.4 , or California Administration Division 1, as applicable. [OSHPD 1] Reference to other chapters. In addition to the code sections referenced, the standards listed in this chapter are applicable to the respective code sections in Chapters 3A, 4A and 5A.

  ACI American Concrete Institute, 38800 Country Club Drive, Farmington Hills, MI 48331-3439

  562—21: Assessment, Repair, and Rehabilitation of Existing Concrete Structures—Code Requirements

  405.1.1

  ASCE/SEI American Society of Civil Engineers Structural Engineering Institute, 1801 Alexander Bell Drive, Reston, VA 20191-4400

  7—1988: Minimum Design Loads and Associated Criteria for Buildings and Other Structures

  503.12, 706.3.2

  7—1993: Minimum Design Loads and Associated Criteria for Buildings and Other Structures

  503.12, 706.3.2

  7—1995: Minimum Design Loads and Associated Criteria for Buildings and Other Structures

  503.12, 706.3.2

  7—1998: Minimum Design Loads and Associated Criteria for Buildings and Other Structures

  503.12, 706.3.2

  7—2002: Minimum Design Loads and Associated Criteria for Buildings and Other Structures

  503.12, 706.3.2

  7—2005: Minimum Design Loads and Associated Criteria for Buildings and Other Structures

  503.12, 706.3.2

  7—2010: Minimum Design Loads and Associated Criteria for Buildings and Other Structures

• CEBC § 4.2.2 Medium relevance — show source text

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 4.2.2 STEEL BEAMS—CONCRETE PROTECTION DEPTH 10″ TO LESS THAN 12″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	DEPTH	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	DEPTH	CONSTRUCTION DETAILS	LOAD	TIME	PRE- BMS-92	BMS-92	POST- BMS-92	POST- BMS-92	POST- BMS-92
  B-SC-1	10″	10″ × 8″ rectangle; aggregate concrete (4170 psi) with 1″ top cover and 2″ bottom cover; No. 13 SWG iron wire loosely wrapped at approximately 6″ pitch about 7″ × 4″ × 16 lbs “I” beam.	3.9 tons	3 hrs 46 min			7	1–3	33/4
  B-SC-2	10″	10″ × 8″ rectangle; aggregate concrete (3630 psi) with 1″ top cover and 2″ bottom cover; No. 13 SWG iron wire loosely wrapped at approximately 6″ pitch about 7″ × 4″ × 16 lbs “I” beam.	5.5 tons	5 hrs 26 min			7	1, 4–7	33/4

  For SI: 1 inch = 25.4 mm, 1 pound = 0.004448 kN, 1 pound per square inch = 0.00689 MPa, 1 ton = 8.896 kN.

  Notes:

  1. Load concentrated at mid-span.
  2. Specimen 10-foot 3-inch clear span simply supported.
  3. Passed Grade “C” fire resistance (British), including hose stream and reload.
  4. Specimen 11-foot clear span—restrained.
  5. Passed Grade “B” fire resistance (British), including hose stream and reload.
  6. See Table 4.1.3, Note 5.
  7. Hourly rating based upon B-SC-1.

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-111

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  SECTION V—DOORS

  FIGURE 5.1

  RESISTANCE OF DOORS TO FIRE EXPOSURE

  NUMBER OF ASSEMBLIES

  10

  5

  0

  |Col1|The number in each box is
  keyed to the last number in the
  Item Code column in the Table.

• CEBC § 2.1.2 Medium relevance — show source text

  0

  FIGURE 2.1.2

  REINFORCED CONCRETE COLUMNS

  MINIMUM DIMENSION 10 ″ TO LESS THAN 12 ″

  2 3 4

  1

  TABLE 2.1.2 REINFORCED CONCRETE COLUMNS MINIMUM DIMENSION 10″ TO LESS THAN 12″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST- BMS-92	POST- BMS-92	POST- BMS-92
  C-10-RC-1	10″	10″ square columns; aggregate concrete (4260 psi); reinforcement: vertical, four 11/4″ rebars; horizontal,3/8″ ties at 6″ pitch; cover: 11/4″.	92.2 tons	1 hr 2 min			7	1	1
  C-10-RC-2	10″	10″ square columns; aggregate concrete (2325 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.	46.7 tons	1 hr 52 min			7	1	13/4

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-67

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 2.1.2—continued REINFORCED CONCRETE COLUMNS MINIMUM DIMENSION 10″ TO LESS THAN 12″	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	MINIMUM ** DIMENSION**	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST- BMS-92	POST- BMS-92	POST- BMS-92
  C-10-RC-3	10″	10″ square columns; aggregate concrete (5370 psi); reinforcement: vertical, four1/2″ rebars; horizontal,5/16″ ties at 6″ pitch; cover: 1″.

• CEBC § 317.3.2 Medium relevance — show source text

  2. There are changes in risk category. 3. The modification to the structural components increases the seismic forces in or strength requirements of any structural component of the existing structure by more than 10 percent cumulative since the original construction, unless the component has the capacity to resist the increased forces determined in accordance with Section 319. If the building’s seismic base shear capacity has been increased since the original construction, the percent change in base shear may be calculated relative to the increased value.

  4. Structural elements need repair where the damage has reduced the lateral-load-resisting capacity of the structural system by more than 10 percent. 5. Changes in live or dead load increase story shear by more than 10 percent.

  317.3.2 Public school buildings. [DSA-SS] For public schools, the provisions of Section 317 apply when required in accordance with Sections 4-307 and 4-309(c) of the California Administrative Code.

  317.3.3 Community college buildings. [DSA-SS/CC] For community colleges, the provisions of Section 317 apply when required in accordance with Sections 4-307 and 4-309(c) of the California Administrative Code.

  317.4 Evaluation required. If the criteria in Section 317.3 apply to the project under consideration, the design professional of record shall provide an evaluation in accordance with Section 317 to determine the seismic performance of the building in its current configuration and condition. If the structure's seismic performance as required by Section 317.5 is evaluated as satisfactory and the peer reviewer(s), when Method B of Section 321 is used, concur, then no structural retrofit is required.

  317.5 Minimum seismic design performance levels for structural and nonstructural components. Following the notations of ASCE 41, the seismic requirements for design and assessment are based upon a prescribed Seismic Hazard Level (BSE-1N, BSE-2N, BSE-1E, BSE-R or BSE-C), a specified structural performance level (S-1 through S-5) and a nonstructural performance level (N-A through N-E). The minimum seismic performance criteria are given in Table 317.5 according to the Building Regulatory Authority and the Risk Category as determined in Chapter 16 of the California Building Code or by the regulatory authority. The building shall be evaluated in accordance with a Tier 3 Systematic Evaluation and Retrofit per ASCE 41 Chapter 6 for both the Level 1 and Level 2 performance levels, and the more restrictive requirements shall apply.

  Exception: If the floor area of an addition is greater than the larger of 50 percent of the floor area of the original building or 1,000 square feet (93 m [2] ), then the Table 317.5 entries for BSE-R (or BSE-1E) and BSE-C are replaced by BSE-1N and BSE-2N, respectively.

  |TABLE 317.5—SEISMIC PERFORMANCE REQUIREMENTS2,

• CEBC § 1.11. Medium relevance — show source text

  Agency|BSC|BSC-
  CG|SFM|1|2|1/AC|AC|SS|SS/CC|1|1R|2|3|4|5|6|6|6|6|6|6|6|6|6| |Adopt Entire Chapter|||||||||||||X|||X||||||||| |Adopt Entire Chapter as
  amended (amended
  sections listed below)|X||X|X|X|||X|X|X|X|X||X|X|||||||||| |Adopt only those sections
  that are listed below||||||||||||||||||||||||| |Chapter / Section||||||||||||||||||||||||| |ASCE/SEI 7—2016||||||||||X|X|X||X|X|||||||||| |ASCE/SEI 7—2022||||||||X|X|X|X|X||X|X|||||||||| |ASCE/SEI 41—2013||||||||||X||||||||||||||| |ASCE/SEI 41—2023|X|||X|X|||X|X|X|X|X||X|X|||||||||| |ASTM A615—15 22||||||||||X||||||||||||||| |ICC A117.1—2017||||†|†|†||||||||||||||||||| |ICC CBC—25||||||||||X||||||||||||||| |NFPA 72—24|||X||||||||||||||||||||||

  The state agency does not adopt sections identified with 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.

  2025 CALIFORNIA EXISTING BUILDING CODE 16-1

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

  16-2 2025 CALIFORNIA EXISTING BUILDING CODE

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

  16 REFERENCED STANDARDS

  User notes:

  About this chapter: This code contains numerous references to standards that are used to regulate materials and methods of construction. Chapter 16 contains a comprehensive list of all standards that are referenced in the code, including the appendices. The standards are part of the code to the extent of the reference to the standard. Compliance with the referenced standard is necessary for compliance with this code. By providing specifically adopted standards, the construction and installation requirements necessary for compliance with the code can be readily determined. The basis for code compliance is, therefore, established and available on an equal basis to the building code official, contractor, designer and owner.