Chapter 3 — PROVISIONS FOR ALL COMPLIANCE METHODS

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user.

See Chapter 1 for state agency authority and building applications.)

Adopting Agency	BSC	BSC- CG	SFM	HCD			DSA			OSHPD						BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting Agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
Adopt Entire Chapter													X
Adopt Entire Chapter as amended (amended sections listed below)
Adopt only those sections that are listed below	X		X	X	X	X		X	X		X	X		X	X
Chapter / Section
301.1 – 301.3.1			X								X	X		X	X
301.1				X	X
301.1_Exception 1_	X
301.1_Exception 2_								X
301.1_Exception 3_									X
301.1_Exception 4_				X	X
301.1_Exception 5_											X	X		X	X
301.1.1	X
301.3				X	X	X					X	X		X	X
301.3.1_Exception_											X	X		X	X
301.3.2				X	X
301.3.3				X	X
301.4				X	X
302			X								X	X		X	X
302.1.1	X
302.2				X	X
302.4				X
302.5	X
304.1	X							X	X
304.2	X							X	X
304 – 305											X	X		X	X
305.1	X							X	X
306													†
306.1_ Note_						X
306.7.7			X
307 – 308			X
308.2				X	X
310 –311											X	X			X
312											X
313 –316			X
317 –322	X							X	X
323								X	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.

Copyright © 2022 by, or licensed to, International Code Council, Inc. (ALL RIGHTS RESERVED); licensed to California Building Standards Commission pursuant to License Agreement. No further reproductions is authorized. Any unauthorized reproduction or distribution is a violation of the federal copyright act and the license agreement, and subject to civil and criminal penalties thereunder.

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CHAPTER 3

PROVISIONS FOR ALL COMPLIANCE METHODS

User note:

About this chapter: Chapter 3 explains the three compliance options for alterations and additions available in the code. In addition, this chapter also lays out the methods to be used for seismic design and evaluation throughout this code. Finally, this chapter clarifies that provi- sions in other I-Codes ^® related to repairs, alterations, additions, relocation and changes of occupancy must also be addressed unless they conflict with this code. In that case, this code takes precedence.

302.5 Occupancy and use.¶

Where determining the appropriate application of the referenced sections of this code, the occupancy and use of a building shall be determined in accordance with Chapter 3 of the California Building Code .

317.9 Any construction required by this chapter shall include¶

structural observation by the registered design professional who is responsible for the structural design in accordance with Section 319.10.

317.10 Where Method B of Section 321 is used or is required¶

by Section 319.7, the proposed method of building evaluation and design procedures must be accepted by the building offi- cial prior to the commencement of the work.

317.11 Voluntary lateral-force-resisting system modifica-¶

tions. Where the exception of Section 317.2 applies, modifi- cations of existing structural components and additions of new structural components that are initiated for the purpose of improving the seismic performance of an existing structure and that are not required by other portions of this chapter are permitted under the requirements of Section 319.12.

319.2 Existing conditions. The existing condition and prop-¶

erties of the entire structure must be determined and docu- mented by thorough inspection of the structure and site, review of all available related construction documents, review of geotechnical and engineering geologic reports, and performance of necessary testing and investigation. Where samples from the existing structure are taken or in situ tests are performed, they shall be selected and interpreted in a sta- tistically appropriate manner to ensure that the properties determined and used in the evaluation or design are repre- sentative of the conditions and structural circumstances likely to be encountered in the structure as a whole. Adjacent structures or site features that may affect the retrofit design shall be identified.

The entire load path of the seismic-force-resisting system shall be determined, documented and evaluated. The load path includes all the horizontal and vertical elements partici- pating in the structural response: such as diaphragms, dia- phragm chords, diaphragm collectors, vertical elements such as walls frames, braces; foundations and the connections between the components and elements of the load path. Repaired or retrofitted elements and the standards under which the work was constructed shall be identified.

Data collection in accordance with ASCE 41 Section 6.2 shall meet the following minimum levels:

1. [BSC] For state-owned buildings, the requirements shall be met following the data collection requirements of ASCE 41, Section 6.2. 2. [DSA-SS, DSA-SS/CC] For public schools and com- munity college buildings constructed in conformance with the Field Act, the “Usual” level as defined in ASCE 41, Section 6.2.2.

PROVISIONS FOR ALL COMPLIANCE METHODS

3. [DSA-SS, DSA-SS/CC] For public schools and com- munity college buildings not constructed in confor- mance with the Field Act, the “Comprehensive” level as defined in ASCE 41, Section 6.2.3. Concrete material requirements and testing for public school and community college buildings shall also comply with Sections 1911A and 1909.5 of the California Building Code, respectively.

Qualified test data from the original construction may be accepted, in part or in whole, by the enforcement agency to fulfill the data collection requirements.

Exceptions:

1. The number of samples for data collection may be adjusted with approval of the enforcement agency when it has been determined that adequate informa- tion has been obtained or additional information is required.

2. Welded steel moment frame connections of buildings that may have experienced potentially damaging ground motions shall be inspected in accordance with Chapters 3 and 4, FEMA 352, Recommended Post Earthquake Evaluation and Repair Criteria for Welded Moment-Frame Construction for Seismic Applications (July 2000).

Where original building plans and specifications are not available, “as-built” plans shall be prepared that depict the existing vertical and lateral structural systems, exterior ele- ments, foundations and nonstructural systems in sufficient detail to complete the design.

Data collection shall be directed and observed by the proj- ect structural engineer or design professional in charge of the design.

319.3 Site geology and soil characteristics. Soil profile shall¶

be assigned in accordance with the requirements of Chapter 18 of the California Building Code.

319.4 Risk categories. Each structure shall be placed in one¶

of the Risk Categories in accordance with the requirements of the California Building Code.

319.5 Configuration requirements. Each structure shall be¶

designated structurally regular or irregular in accordance with the requirements of ASCE 41, Sections 7.3.1.1.1 to 7.3.1.1.4.

319.6 General selection of the design method. The require-¶

ments of Method B (Section 321) may be used for any existing building.

319.7 Prescriptive selection of the design method. The¶

requirements of Method A (Section 320) or the specific pro- cedures for applicable building types given in Section 319.1.1 are permitted to be used except under the following condi- tions, where the requirements of Method B (Section 321) must be used.

319.7.1 When the building contains prestressed or post- tensioned structural components (beams, columns, walls or slabs) or contains precast structural components (beams, columns, walls or flooring systems).

319.10 Structural observation, testing and inspection. Struc-¶

tural observation, testing and inspection as used in this sec- tion shall mean meeting the requirements of Chapter 17 of the California Building Code, with a minimum allowable level of investigation corresponding to seismic design cate- gory (SDC) D. Structural observation visits shall occur at significant construction stages and at the completion of the structural retrofit. Structural observation shall be provided for all structures.

Additional requirements: [DSA-SS, DSA-SS/CC] For public schools and community colleges, construction material testing, inspection and observation during con- struction shall also comply with the California Adminis- trative Code.

319.10.1 The requirement for structural observation shall be noted and prominently displayed on the front sheet of the approved plans and incorporated into the general notes on the approved plans.

319.10.2 Preconstruction meeting. A preconstruction meeting is mandatory for all projects which require struc- tural observation. The meeting shall include, but is not limited to, the registered design professional, structural observer, general constructor, affected subcontractors, the project inspector and a representative of the enforce- ment agency (designated alternates may attend if approved by the structural observer). The structural observer shall schedule and coordinate this meeting. The purpose of the meeting is to identify and clarify all essen- tial structural components and connections that affect the lateral and vertical load systems and to review scheduling of the required observations for the project’s structural system retrofit.

319.11 Temporary actions. When compatible with the build-¶

ing use, and the time phasing for both use and the retrofit program, temporary shoring or other structural support is permitted to be considered. Temporary bracing, shoring and prevention of falling hazards are permitted to be used to qualify for Item 1 in Section 319.12 that allows inadequate capability in some existing components, as long as the required performance levels given in Section 317 can be pro- vided by the permanent structure. The consideration for such temporary actions shall be noted in the design documents.

319.12 Voluntary modifications to the lateral-force resisting¶

system. Where modifications of existing structural compo- nents and additions of new structural components are initi- ated for the purpose of improving the lateral-force resisting strength or stiffness of an existing structure and they are not required by other sections of this code, then they are permit- ted to be designed to meet an approved seismic performance criteria provided that an engineering analysis is submitted that follows:

1. The capacity of existing structural components required to resist forces is not reduced, unless it can be demonstrated that reduced capacity meets the require- ments of Section 319.8.

2. The lateral loading to or strength requirement of exist- ing structural components is not increased beyond their capacity.

PROVISIONS FOR ALL COMPLIANCE METHODS

319.7.2 When the building is classified as irregular in ver- tical or horizontal plan. If the evaluation and retrofit is in accordance with Table 317.5 Footnote 2 or 3, the building shall be classified by application of ASCE 7, Section 12.3.2. If the evaluation and retrofit is in accordance with ASCE 41, the building shall be classified as irregular when an irregularity defined in ASCE 41, Sections 7.3.1.1.1 to 7.3.1.1.4 exists.

Exception: Section 319.7.2 does not apply in the fol- lowing conditions:

1. The retrofit design removes the configurational attributes that caused the building to be classified as irregular.

2. The irregularity is demonstrated not to affect the seismic performance of the building.

319.7.3 For any building that is assigned to Risk Category IV.

319.7.4 For any building using undefined or hybrid struc- tural systems.

319.7.5 When seismic isolation or energy dissipation sys- tems are used in the retrofit or repair, either as part of the existing structure or as part of the modifications.

319.7.6 When the height of the structure exceeds 240 feet (73 152 mm).

319.7.7 When ASCE 41 is the evaluation standard and its application requires the use of nonlinear procedures.

319.8 Strength requirements. All components of the lateral-¶

force-resisting system must have the strength to meet the accep- tance criteria prescribed in ASCE 41, Chapter 7 or as pre- scribed in the applicable Appendix A chapter of this code if a specific procedure in Section 319.1.1 is used. Any component not having this strength shall have its capacity increased by modifying or supplementing its strength so that it exceeds the demand, or the demand is reduced to less than the existing strength by making other modifications to the structural system.

Exception: A component’s strength is permitted to be less than that required by the specified seismic load combina- tions if it can be demonstrated that the associated reduc- tion in seismic performance of the component or its removal due to the failure does not result in a structural system that does not comply with the required perfor- mance objectives of Section 317. If this exception is taken for a component, then it cannot be considered part of the primary lateral-load-resisting system.

319.9 Nonstructural component requirements. Where the¶

nonstructural performance levels required by Section 317, Table 317.5 are N-D or higher, mechanical, electrical and plumbing components shall comply with the provisions of ASCE 41, Chapter 13, Section 13.2.

Exception: Modifications to the procedures and criteria may be made subject to approval by the building official, and concurrence of the peer reviewer if applicable. All reports and correspondence shall also be forwarded to the building official.

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3. New structural components are detailed and connected to the existing structural components as required by the California Building Code.

4. New or relocated nonstructural components are detailed and connected to existing or new structural components as required by the California Building Code.

5. A dangerous condition is not created. Use of ASCE 41 Tier 1 and Tier 2 deficiency only retrofit procedures are pre-approved for use where Section 317.3 does not require an assessment.

319.12.1 State-owned buildings. [BSC] Voluntary modifi- cations to lateral force-resisting systems conducted in accordance with Appendix A of this code and the refer- enced standards of the California Building Code shall be permitted.

319.12.1.1 Design documents. [BSC] When Section 319.12 is the basis for structural modifications, the approved design documents must clearly state the scope of the seismic modifications and the accepted cri- teria for the design. The approved design documents must clearly have the phrase “The seismic require- ments of the California Existing Building Code have not been checked to determine if these structural modi- fications meet the full seismic evaluation and strength- ening requirements of Sections 317-322: the modifications proposed are to a different seismic per- formance standard than would be required in Section 319 if they were not voluntary as allowed in Section 319.12.” 319.12.2 Public schools and community colleges. [DSA- SS, DSA-SS/CC] When Section 319.12 is the basis for structural modifications, the approved design documents must clearly indicate the scope of modifications and the acceptance criteria for the design.

312A.6 Vacated space. Vacated spaces intended to remain¶

vacant while under the jurisdiction of OSHPD shall be sub- ject to the provisions of Section 312.3.5.

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CALIFORNIA EXISTING BUILDING CODE – MATRIX ADOPTION TABLE