Loads and environmental hazards

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

• CEBC § 0.3 High relevance — show source text

  [HCD 1 & HCD 2] [OSHPD 1, 1R, 2, 4 & 5] “Code Official” shall mean “Building Official” as defined in this code.

  CRITICAL CARE AREA. [OSHPD 1] See California Administrative Code Chapter 6.

  [BS] DANGEROUS. Any building, structure or portion thereof that meets any of the conditions described below shall be deemed dangerous:

  1. The building or structure has collapsed, has partially collapsed, has moved off its foundation or lacks the necessary support of the ground.
  2. There exists a significant risk of collapse, detachment or dislodgement of any portion, member, appurtenance or ornamentation of the building or structure under permanent, routine or frequent loads; under actual loads already in effect; or under snow, wind, rain, flood, earthquake aftershock or other environmental loads when such loads are imminent.

  [A] DEFERRED SUBMITTAL. Those portions of the design that are not submitted at the time of the application and that are to be submitted to the code official within a specified period.

  [BS] DISPROPORTIONATE EARTHQUAKE DAMAGE. A condition of earthquake-related damage where both of the following occur:

  1. The 0.3-second spectral acceleration at the building site for the earthquake in question, as estimated by one of the following, is less than 30 percent of the mapped acceleration parameter S S : 1.1. The United States Geological Survey’s algorithm for the data point closest to the site. 1.2. As determined from peer-reviewed seismograph records from the site or from locations closer to the site than the algorithm-provided data points.
  2. The vertical elements of the lateral force-resisting system have suffered damage such that the lateral load-carrying capacity of any story in any horizontal direction has been reduced by more than 10 percent from its pre-earthquake condition.

  [BE] EMERGENCY ESCAPE AND RESCUE OPENING. An operable exterior window, door or other similar device that provides for a means of escape and access for rescue in the event of an emergency.

  ENFORCEMENT AGENCY. [BSC, DSA-SS, DSA-SS/CC] The agency or organization charged with responsibility for agency or organization compliance with the requirements of this code, also known as the Authority Having Jurisdiction in ASCE 41.

  EQUIPMENT OR FIXTURE. Any plumbing, heating, electrical, ventilating, air conditioning, refrigerating and fire protection equipment; and elevators, dumbwaiters, escalators, boilers, pressure vessels and other mechanical facilities; or installations that are related to building services. Equipment or fixture shall not include manufacturing, production or process equipment, but shall include connections from building service to process equipment.

  [A] EXISTING BUILDING. A building erected prior to the date of adoption of the appropriate code, or one for which a legal building permit has been issued.

  [A] EXISTING STRUCTURE. A structure erected prior to the date of adoption of the appropriate code, or one for which a legal building permit has been issued.

  EXISTING STRUCTURE. [OSHPD 1, 1R, 2, 4 & 5] A structure that has a valid certificate of occupancy issued by the building official.

  EXTERIOR ELEVATED ELEMENT. See Government Code Section 17973(b)(2).

• CEBC § 405.2.4 High relevance — show source text

  [BS] 405.2.4 Substantial structural damage to gravity load-carrying components. Gravity load-carrying components that have sustained substantial structural damage shall be retrofitted to comply with the applicable provisions for dead, live and snow loads in the California Building Code . Undamaged gravity load-carrying components, including undamaged foundation components, that receive dead, live or snow loads from retrofitted components shall also be retrofitted if required to comply with these design loads.

  [BS] 405.2.4.1 Lateral force-resisting elements. Regardless of the level of damage to vertical elements of the lateral forceresisting system, if substantial structural damage to gravity load-carrying components was caused primarily by wind or seismic effects, then the building shall be evaluated in accordance with Section 405.2.3.1 and, if noncompliant, retrofitted in accordance with Section 405.2.3.3.

  Exceptions:

  1. Buildings assigned to Seismic Design Category A, B or C whose substantial structural damage was not caused by earthquake need not be evaluated or retrofitted for load combinations that include earthquake effects.
  2. One- and two-family dwellings need not be evaluated or retrofitted for load combinations that include earthquake effects.

  [BS] 405.2.5 Substantial structural damage to snow load-carrying components. Where substantial structural damage to any snow load-carrying components is caused by or related to snow load effects, any components required to carry snow loads on roof framing of similar construction shall be repaired, replaced or retrofitted to satisfy the requirements of Section 1608 of the California Building Code .

  [BS] 405.2.6 Flood hazard areas. In flood hazard areas, buildings that have sustained substantial damage shall be brought into compliance with Section 1612 of the California Building Code or Section R306 of the California Residential Code, as applicable.

  SECTION 406—ELECTRICAL

  [OSHPD 1R, 2, 4 & 5] Not adopted by OSHPD. Existing electrical wiring and equipment undergoing repair shall be in accordance with Title 24 Part 3 California Electrical Code (CEC).

  406.1 General. Repairs to existing electrical wiring and equipment shall be in accordance with the California Electrical Code.

  406.1.1 Reconditioned electrical equipment. Reconditioned electrical equipment shall comply with the California Electrical Code . Electrical equipment prohibited from being reconditioned by the applicable sections of the California Electrical Code shall not be reconditioned unless permitted by NFPA 99.

  406.1.2 Health care facilities. Portions of electrical systems being repaired in Group I-2, ambulatory care facilities and outpatient clinics shall comply with NFPA 99 requirements for repairs.

  SECTION 407—MECHANICAL

  407.1 General. Existing mechanical systems undergoing repair shall not make the building less complying than it was before the damaged occurred. [HCD 1, HCD 2 & BSC] Existing mechanical systems undergoing repair shall comply with the California Mechanical Code.

  SECTION 408—PLUMBING

  408.1 Materials. Plumbing materials and supplies shall not be used for repairs that are prohibited in the California Plumbing Code .

• CEBC § 1.11. High relevance — show source text

  Note: Building shall have the same meaning as defined in Health and Safety Code Sections 17920 and 18908 for the applications speci- fied in Section 1.11.

  BUILDING OFFICIAL. [BSC, DSA-SS, DSA-SS/CC] The individual within the agency or organization charged with responsibility for compliance with the requirements of this code. For some agencies this person is termed the “enforcement agent.”

  BUILDING OFFICIAL. [HCD 1, HCD 2] [OSHPD 1, 1R, 2, 4 & 5] The officer or other designated authority charged with the administration and enforcement of this code, or a duly authorized representative.

  CHANGE IN FUNCTION. [OSHPD 1, 1R, 2, 4 & 5] See California Building Code Section 1224.3.

  [A] CHANGE OF OCCUPANCY. Any of the following shall be considered as a change of occupancy where the current California Building Code requires a greater degree of safety, accessibility, structural strength, fire protection, means of egress, ventilation or sanitation than is existing in the current building or structure:

  1. Any change in the occupancy classification of a building or structure.
  2. Any change in the purpose of, or a change in the level of activity within, a building or structure.
  3. A change of use.

  [A] CHANGE OF USE. A change in the use of a building or a portion of a building, within the same group classification, for which there is a change in application of the code requirements.

  [A] CODE OFFICIAL. The officer or other designated authority charged with the administration and enforcement of this code.

  [HCD 1 & HCD 2] [OSHPD 1, 1R, 2, 4 & 5] “Code Official” shall mean “Building Official” as defined in this code.

  CRITICAL CARE AREA. [OSHPD 1] See California Administrative Code Chapter 6.

  [BS] DANGEROUS. Any building, structure or portion thereof that meets any of the conditions described below shall be deemed dangerous:

  1. The building or structure has collapsed, has partially collapsed, has moved off its foundation or lacks the necessary support of the ground.
  2. There exists a significant risk of collapse, detachment or dislodgement of any portion, member, appurtenance or ornamentation of the building or structure under permanent, routine or frequent loads; under actual loads already in effect; or under snow, wind, rain, flood, earthquake aftershock or other environmental loads when such loads are imminent.

  [A] DEFERRED SUBMITTAL. Those portions of the design that are not submitted at the time of the application and that are to be submitted to the code official within a specified period.

  [BS] DISPROPORTIONATE EARTHQUAKE DAMAGE. A condition of earthquake-related damage where both of the following occur:

  1. The 0.3-second spectral acceleration at the building site for the earthquake in question, as estimated by one of the following, is less than 30 percent of the mapped acceleration parameter S S : 1.1. The United States Geological Survey’s algorithm for the data point closest to the site. 1.2. As determined from peer-reviewed seismograph records from the site or from locations closer to the site than the algorithm-provided data points.
• CEBC § 16-33 High relevance — show source text

  1612 Flood Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-33

  1613 Earthquake Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-34

  1614 Atmospheric Ice Loads . . . . . . . . . . . . . . . . . . . . . . . .16-36

  1615 Tsunami Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16-36

  1616 Structural Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . .16-36

  1617 Additional Requirements for Community Colleges [DSA-SS/CC] . . . . . . . . . . . . . 16-38

  CHAPTER 16A STRUCTURAL DESIGN. . . . . . . . . . . . . . . . . 16A-1

  1601A General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-3

  1602A Notations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-3

  1603A Construction Documents . . . . . . . . . . . . . . . . . . . . . . . 16A-4

  1604A General Design Requirements. . . . . . . . . . . . . . . . . . . 16A-5

  1605A Load Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-10

  1606A Dead Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-10

  1607A Live Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-11

  1608A Snow Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-19

  1609A Wind Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-24

  1610A Soil Loads and Hydrostatic Pressure. . . . . . . . . . . . 16A-31

  1611A Rain Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-32

  1612A Flood Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-33

• CEBC § 16A-5 High relevance — show source text

  1604A General Design Requirements. . . . . . . . . . . . . . . . . . . 16A-5

  1605A Load Combinations . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-10

  1606A Dead Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-10

  1607A Live Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-11

  1608A Snow Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-19

  1609A Wind Loads. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-24

  1610A Soil Loads and Hydrostatic Pressure. . . . . . . . . . . . 16A-31

  1611A Rain Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-32

  1612A Flood Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-33

  1613A Earthquake Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-34

  1614A Atmospheric Ice Loads . . . . . . . . . . . . . . . . . . . . . . . . 16A-34

  1615A Tsunami Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-34

  1616A Structural Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . 16A-34

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  1617A Modifications to ASCE 7 . . . . . . . . . . . . . . . . . . . . . . . .16A-36

  CHAPTER 17 SPECIAL INSPECTIONS AND TESTS . . . . . . 17-1

  1701 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-3

  1702 New Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-3

  1703 Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17-3

• CEBC § 1604.8.3 High relevance — show source text

  See Sections 1609 for wind design requirements and 1613 for earthquake design requirements. 1604.8.3 Decks. Where supported by attachment to an exterior wall, decks shall be positively anchored to the primary structure and designed for both vertical and lateral loads as applicable. Such attachment shall not be accomplished by the use of toenails or nails subject to withdrawal. Where positive connection to the primary building structure cannot be verified during inspection, decks shall be self-supporting. Connections of decks with cantilevered framing members to exterior walls or other framing members shall be designed for both of the following:

  1. The reactions resulting from the dead load and live load specified in Table 1607.1, or the snow load specified in Section 1608, in accordance with Section 1605, acting on all portions of the deck.
  2. The reactions resulting from the dead load and live load specified in Table 1607.1, or the snow load specified in Section 1608, in accordance with Section 1605, acting on the cantilevered portion of the deck, and no live load or snow load on the remaining portion of the deck. 1604.9 Wind and seismic detailing. Lateral force-resisting systems shall meet seismic detailing requirements and limitations prescribed in this code and ASCE 7 Chapters 11, 12, 13, 15, 17 and 18 as applicable, even where wind load effects are greater than seismic load effects.

  Exception: References within ASCE 7 to Chapter 14 shall not apply, except as specifically required herein.

  1604.10 Loads on storm shelters. Loads and load combinations on storm shelters shall be determined in accordance with ICC 500.

  SECTION 1605—LOAD COMBINATIONS

  1605.1 General. Buildings and other structures and portions thereof shall be designed to resist the strength load combinations specified in ASCE 7, Section 2.3, the allowable stress design load combinations specified in ASCE 7, Section 2.4, or the alternative allowable stress design load combinations of Section 1605.2.

  Exceptions:

  1. The modifications to load combinations of ASCE 7, Section 2.3, ASCE 7, Section 2.4 and Section 1605.2 specified in ASCE 7 Chapters 18 and 19 shall apply.

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  STRUCTURAL DESIGN

  2. Where the allowable stress design load combinations of ASCE 7, Section 2.4 are used, flat roof snow loads of 45 pounds per square foot (2.15 kN/m [2] ) and roof live loads of 30 pounds per square foot (1.44 kN/m [2] ) or less need not be combined with seismic load. Where flat roof snow loads exceed 45 pounds per square foot (2.15 kN/m [2] ), 15 percent shall be combined with seismic loads.

  3. Where the allowable stress design load combinations of ASCE 7 Section 2.4 are used, crane hook loads need not be combined with roof live loads or with more than three-fourths of the snow load or one-half of the wind loads.

  4. Where design for tornado loads is required, the alternative allowable stress design load combinations of Section 1605.2 shall not apply when tornado loads govern the design.

• CEBC § 31-6 High relevance — show source text

  Any loads in excess of the design snow or ice load shall be removed prior to its occupancy, or the public-occupancy temporary structure shall be vacated in the event that either the design snow or ice load is exceeded during its occupancy.

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  SPECIAL CONSTRUCTION

  2. Wind speeds associated with the design wind loads shall be monitored before and during occupancy of the public-occupancy temporary structure. The public-occupancy temporary structure shall be vacated in the event that the design wind speed is expected to be exceeded during its occupancy.
  3. Criteria for initiating occupant evacuation procedures for flood and tsunami events.
  4. Occupant evacuation procedures shall be specified for each environmental hazard where the occupant management plan specifies the public-occupancy temporary structure is to be evacuated.
  5. Procedures for anchoring or removal of the public-occupancy temporary structure, or other additional measures or procedures to be implemented to mitigate hazards in snow, wind, flood, ice or tsunami events.

  SECTION 3104—PEDESTRIAN WALKWAYS AND TUNNELS

  3104.1 General. This section shall apply to connections between buildings such as pedestrian walkways or tunnels, located at, above or below grade level, that are used as a means of travel by persons. The pedestrian walkway shall not contribute to the building area or the number of stories or height of connected buildings.

  3104.1.1 Application. Pedestrian walkways shall be designed and constructed in accordance with Sections 3104.2 through 3104.9. Tunnels shall be designed and constructed in accordance with Sections 3104.2 and 3104.10.

  3104.2 Separate structures. Buildings connected by pedestrian walkways or tunnels shall be considered to be separate structures.

  Exceptions:

  1. Buildings that are on the same lot and considered as portions of a single building in accordance with Section 503.1.2.
  2. [DSA-AC and HCD 1-AC] For purposes of accessibility in residential facilities as required by Chapters 11A and 11B, structur- ally connected buildings, buildings connected by stairs, walkways or roofs, and buildings with multiple wings shall be considered one structure.

  3104.3 Construction. The pedestrian walkway shall be of noncombustible construction.

  Exceptions:

  1. Combustible construction shall be permitted where connected buildings are of combustible construction.
  2. Fire-retardant-treated wood, in accordance with Section 603.1, Item 1.3, shall be permitted for the roof construction of the pedestrian walkway where connected buildings are not less than Type I or II construction.

  3104.4 Contents. Only materials and decorations approved by the building official shall be located in the pedestrian walkway.

  3104.5 Connections of pedestrian walkways to buildings. The connection of a pedestrian walkway to a building shall comply with Section 3104.5.1, 3104.5.2, 3104.5.3 or 3104.5.4.

  Exception: Buildings that are on the same lot and considered as portions of a single building in accordance with Section 503.1.2.

  3104.5.1 Fire barriers. Pedestrian walkways shall be separated from the interior of the building by not less than 2-hour fire barriers constructed in accordance with Section 707 and Sections 3104.5.1.1 through 3104.5.1.3.

• CEBC § 304A.3.4.5 High relevance — show source text

  Use_ of Section 304A.3.4.5 to rehabilitate SPC-3, SPC-4D and SPC-4 buildings will result in re-classification of the building to SPC-4D. Noncompliant SPC-4 buildings may be rehabilitated to SPC-5 in accordance with Section 304A.3.4.6 using the reduced seismic hazard. New structural members and connections required by this rehabilitation design shall comply with the detailing provisions of this code for new buildings of similar structure, purpose and location.

  405 A .2.4 Substantial structural damage to gravity load-carrying components. Gravity load-carrying components that have sustained substantial structural damage shall be retrofitted to comply with the applicable provisions for dead, live and snow loads in the California Building Code . Undamaged gravity load-carrying components, including undamaged foundation components, that receive dead, live or snow loads from retrofitted components shall also be retrofitted if required to comply with these design loads. New structural members and connections required by this rehabilitation design shall comply with the detailing provi- sions of this code for new buildings of similar structure, purpose and location.

  405 A .2.4.1 Lateral force-resisting elements. Regardless of the level of damage to vertical elements of the lateral force-resisting system, if substantial structural damage to gravity load-carrying components was caused primarily by wind or seismic effects, then the building shall be evaluated in accordance with Section 405 A .2.3.1 and, if noncompliant, retrofitted in accordance with Section 405 A .2.3.3.

  Exceptions:

  1. Buildings assigned to Seismic Design Category A, B or C whose substantial structural damage was not caused by earthquake need not be evaluated or retrofitted for load combinations that include earthquake effects.
  2. One- and two-family dwellings need not be evaluated or retrofitted for load combinations that include earthquake effects.

  405 A .2.5 Substantial structural damage to snow load-carrying components. Where substantial structural damage to any snow load-carrying components is caused by or related to snow load effects, any components required to carry snow loads on roof framing of similar construction shall be repaired, replaced or retrofitted to satisfy the requirements of Section 1608 of the California Building Code .

  405 A .2.6 Flood hazard areas. In flood hazard areas, buildings that have sustained substantial damage shall be brought into compliance with Section 1612 A of the California Building Code .

  SECTION 406 A —ELECTRICAL

  406 A .1 General. Existing electrical wiring and equipment undergoing repair shall be in accordance with Title 24 Part 3 California Electri- cal Code (CEC).

  406 A .1.1 Reconditioned electrical equipment. Reconditioned electrical equipment shall comply with the California Electrical Code . Electrical equipment prohibited from being reconditioned by the applicable sections of the California Electrical Code shall not be reconditioned unless permitted by NFPA 99.

  406 A .1.2 Health care facilities. Portions of electrical systems being repaired in Group I-2, ambulatory care facilities and outpatient clinics shall comply with NFPA 99 requirements for repairs.

  SECTION 407 A —MECHANICAL

• CEBC § 906.3 High relevance — show source text

  2, 906.3, 906.6, 1001.2, 1001.3, 1002.1, 1002.2, 1002.3, 1002.4, 1004.1, 1006.1, 1006.2, 1006.3, 1006.4, 1010.1, 1011.1, 1011.2.1, 1011.2.2, 1011.3, 1011.5.1, 1011.5.2, 1011.5.3, 1011.5.6, 1011.6.1, 1011.6.1.1, 1011.6.3, 1011.7.1, 1011.7.2, 1011.7.3, 1011.8.1, 1011.8.2, 1011.8.3, 1101.2, 1101.3, 1101.5, 1101.7, 1102.1, 1102.2, 1102.3, 1103.1, 1103.2, 1103.3, 1201.4, 1202.2, 1203.12, 1204.2, 1204.9, 1206.1, 1302.1.2, 1302.1.3, 1302.1.4, 1303.1.3, 1304.1.1, 1305.2.1, 1305.2.1.1, 1305.2.2, 1305.2.2.1, 1305.2.3.2, 1305.2.3.3, 1305.2.4.1, 1305.2.5, 1305.2.5.1, 1305.2.6, 1305.2.7.1, 1305.2.8, 1305.2.9, 1305.2.9.1, 1305.2.10, 1305.2.10.1, 1305.2.11, 1305.2.11.1, 1305.2.12.1, 1305.2.13, Table 1305.2.15, 1305.2.15.1, 1305.2.16.1, 1305.2.17, 1305.2.17.1, 1305.2.18, 1305.2.18.1, 1305.2.19, Table 1305.2.19, 1305.2.20, 1305.2.20.1, 1307.1.1, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6, 1501.5, 1504.1.1, 1504.1.4.1, 1504.1.7, 1509.1, 1509.3, 1510.1

  CEC — 25 : California Energy Code

  302.2, 702.7, 708.1, 809.1, 907.1, 1104.1

• CEBC § 1305.2.3.3 Medium relevance — show source text

  2, 1305.2.3.3, 1305.2.4.1, 1305.2.5, 1305.2.5.1, 1305.2.6, 1305.2.7.1, 1305.2.8, 1305.2.9, 1305.2.9.1, 1305.2.10, 1305.2.10.1, 1305.2.11, 1305.2.11.1, 1305.2.12.1, 1305.2.13, Table 1305.2.15, 1305.2.15.1, 1305.2.16.1, 1305.2.17, 1305.2.17.1, 1305.2.18, 1305.2.18.1, 1305.2.19, Table 1305.2.19, 1305.2.20, 1305.2.20.1, 1307.1.1, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6, 1501.5, 1504.1.1, 1504.1.4.1, 1504.1.7, 1509.1, 1509.3, 1510.1

  CEC — 25 : California Energy Code

  302.2, 702.7, 708.1, 809.1, 907.1, 1104.1

  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

• CEBC § 2.2 Medium relevance — show source text

  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.

  405 A .2.3 Substantial structural damage to vertical elements of the lateral force-resisting system. A building that has sustained substantial structural damage to the vertical elements of its lateral force-resisting system shall be evaluated in accordance with Section 405 A .2.3.1, and either repaired in accordance with Section 405 A .2.3.2 or repaired and retrofitted in accordance with Section 405 A .2.3.3, depending on the results of the evaluation.

  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 lateral force-resisting system of the damaged building, including its foundation, if repaired to its predamage state, would comply with the provisions of the California Build- ing Code for load combinations that include wind and earthquake effects. Earthquake loads for this evaluation, if required, shall

  2025 CALIFORNIA EXISTING BUILDING CODE 4A-3

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  �

  REPAIRS

  be permitted to be 75 percent of those prescribed in California Building Code Section 1613A. Alternatively, where the earthquake damage has not resulted in disproportionate earthquake damage or did not result in collapse, the earthquake load evaluation shall be permitted to be performed in accordance with Section 304A.3.4.4 for SPC-2 buildings and Section 304A.3.4.5 for buildings rated SPC-3, SPC-4D and SPC-4. SPC-5 buildings shall be permitted to be evaluated in accordance with Section 304A.3.4.6, except that the seismic hazard shall be permitted to be reduced to BSE-1E and BSE-2E.

  405 A .2.3.2 Extent of repair for compliant buildings. If the evaluation establishes that the building in its predamage condition complies with the provisions of Section 405.2.3.1, then the damaged elements shall be permitted to be restored to their predamage condition.

  405 A .2.3.3 Extent of repair for noncompliant buildings. If the evaluation does not establish that the lateral force-resisting system of the building in its predamage condition complies with the provisions of Section 405.2.3.1, then the lateral forceresisting system, and its foundation, shall be retrofitted to comply with the provisions of this section. The wind loads for the repair and retrofit shall be those required by the building code in effect at the time of original construction, unless the damage was caused by wind, in which case the wind loads shall be in accordance with the California Building Code . The earthquake loads shall not be less than those required by the building code in effect at the time of original construction but not less than 75 _percent of those prescribed in California Building Code Section 1613A.

• CEBC § 5A-5 Medium relevance — show source text

  503 A .3 Existing structural elements carrying gravity load. Any existing gravity load-carrying structural element for which an alteration causes an increase in design dead, live or snow load, including snow drift effects, of more than 5 percent shall be replaced or altered as needed to carry the gravity loads required by the California Building Code for new structures. Any existing gravity loadcarrying structural element whose gravity load-carrying capacity is decreased as part of the alteration shall be shown to have the capacity to resist the applicable design dead, live and snow loads including snow drift effects required by the California Building Code for new structures.

  503 A .4 Existing structural elements carrying lateral load. Except as permitted by Section 503 A .13, where the alteration increases design lateral loads, results in a prohibited structural irregularity as defined in the California Building Code, ASCE 7, or decreases the

  2025 CALIFORNIA EXISTING BUILDING CODE 5A-5

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

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  PRESCRIPTIVE COMPLIANCE METHOD

  capacity of any existing lateral load-carrying structural element, the lateral force-resisting system of the altered building or structure shall meet the requirements of Section s 1609 A and 1613A of the California Building Code .

  Exceptions: For incidental and minor alterations:

  1. Any existing lateral load-carrying structural element whose demand-capacity ratio with the alteration considered is not more than 10 percent greater than its demand-capacity ratio with the alteration ignored shall be permitted to remain unaltered. For purposes of calculating demand-capacity ratios, the demand shall consider applicable load combinations with design lateral loads or forces in accordance with Section s 1609 A and 1613A of the California Building Code . Reduced seismic forces, to 75 percent of those in Section 1613A, shall be permitted. The same methodology shall be used for the altered and unaltered structures. For purposes of this exception, comparisons of demand-capacity ratios and calculation of design lateral loads, forces and capacities shall account for the cumulative effects of additions and alterations since original construction. When calculating demand-capacity ratios for wind, the date of original construction shall be permitted to be taken as the date of completion of a prior addition, alteration or repair in compliance with Section 1609 A of the California Building Code or the code wind forces in effect at the time. When calculating demand-capacity ratios for earthquake, the date of original construction shall be permitted to be taken as the date of completion of a prior addition, alteration or repair in compliance with Section 304A.3.4 of this code, or the full or reduced seismic forces in effect at the time.

  2. Buildings in which the increase in the demand-capacity ratio is due entirely to the addition of rooftop-supported mechanical equipment individually having an operating weight less than 400 pounds (181.4 kg) and where the total additional weight of all rooftop equipment placed after initial construction of the building is less than 10 percent of the roof dead load. For purposes of this exception, “roof” shall mean the roof level above a particular story.