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Chapter 4 — REPAIRS

Section 405A

California Existing Building Code (Title 24, Part 10) · 2019 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

STRUCTURAL

[BS] 405 A .1 General. Buildings and structures, and parts thereof, shall be repaired in conformance with Section 405A.2. Work on nondamaged components that is necessary for the required repair of damaged components shall be con- sidered part of the repair and shall not be subject to the requirements for alterations in Chapter 5A. Routine mainte- nance required by Chapter 3A, ordinary repairs exempt from permit in accordance with California Building Code Section 105.2, and abatement of wear due to normal service condi- tions shall not be subject to the requirements for repairs in this section.

[BS] 405 A .2 Repairs to damaged buildings. Repairs to damaged buildings shall comply with this section.

[BS] 405 A .2.1 Repairs for less than substantial struc- tural damage. For damage less than substantial struc- tural damage, repairs shall be allowed that restore the building to its predamage state. New structural members and connections used for this repair shall comply with the detailing provisions of this code for new buildings of simi- lar structure, purpose and location.

[BS] 405 A .2.1.1 Snow damage. Structural components whose damage was caused by or related to snow load effects shall be repaired, replaced or altered to satisfy the requirements of Section 1608 A of the California Building Code .

[BS] 405 A .2.2 Disproportionate earthquake damage. A building assigned to Seismic Design Category D, E or F that has sustained disproportionate earthquake damage shall be subject to the requirements for buildings with substantial structural damage to vertical elements of the lateral force-resisting system.

[BS] 405 A .2.3 Substantial structural damage to vertical elements of the lateral force-resisting system. A build- ing that has sustained substantial structural damage to the vertical elements of its lateral force-resisting system shall be evaluated and repaired in accordance with the applica- ble provisions of Sections 405A.2.3.1 through 405A.2.3.3.

[BS] 405 A .2.3.1 Evaluation. The building shall be evaluated by a registered design professional, and the evaluation findings shall be submitted to the building official. The evaluation shall establish whether the damaged building, if repaired to its predamage state, would comply with the provisions of this code for wind and earthquake loads. Wind loads for this evaluation

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401 A .1 Scope. Repairs shall comply with the requirements of this chapter. The provisions of this chapter shall apply to existing structures for applications listed in Section 1.10.1

[OSHPD 1] regulated by the Office of Statewide Health Planning and Development (OSHPD).

401 A .2 Compliance. The work shall not make the building less complying than it was before the repair was undertaken.

[BS] 401 A .3 Flood hazard areas. For buildings and struc- tures in flood hazard areas established in California Building Code Section 1612A.3, any repair that constitutes substantial improvement of the existing structure, as defined in Chapter 2 shall comply with the flood design requirements for new con- struction, and all aspects of the existing structure shall be brought into compliance with the requirements for new con- struction for flood design.

For buildings and structures in flood hazard areas estab- lished in California Building Code Section 1612A.3, any repairs that do not constitute substantial improvement or repair of substantial damage of the existing structure, as defined in Chapter 2, are not required to comply with the flood design requirements for new construction.

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▸Contents — California Existing Building Code (Title 24, Part 10)
California Existing Building Code (Title 24, Part 10)
  1. Chapter 2 — DEFINITIONS
  2. Appendix A — GUIDELINES FOR
  3. Appendix B — SUPPLEMENTARY
  4. Appendix C — GUIDELINES FOR THE
  5. Chapter 1 — SCOPE AND ADMINISTRATION
  6. Chapter 3 — PROVISIONS FOR ALL COMPLIANCE METHODS
  7. ▸Chapter 4 — REPAIRS
    Overview
    1. Section 401
    2. Section 404
    3. Section 405
    4. Section 402
    5. Section 403
    6. Section 406
    7. Section 407
    8. Section 408
    9. Section 401A
    10. Section 405A
    11. Section 402A
    12. Section 403A
    13. Section 404A
    14. Section 406A
    15. Section 407A
    16. Section 408A
  8. Chapter 5 — PRESCRIPTIVE COMPLIANCE METHOD
  9. Chapter 6 — CLASSIFICATION OF WORK
  10. Chapter 7 — ALTERATIONS - LEVEL 1
  11. Chapter 8 — ALTERATIONS - LEVEL 2
  12. Chapter 9 — ALTERATIONS - LEVEL 3
  13. Chapter 10 — CHANGE OF OCCUPANCY
  14. Chapter 11 — ADDITIONS
  15. Chapter 12 — HISTORIC BUILDINGS
  16. Chapter 13 — PERFORMANCE COMPLIANCE METHODS
  17. Chapter 14 — RELOCATED OR MOVED BUILDINGS
  18. Chapter 15 — CONSTRUCTION SAFEGUARDS
  19. Chapter 16 — REFERENCED STANDARDS

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