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Earlier editions: 2026-09

Title 9 — BUILDING REGULATIONS

Manhattan Beach Municipal Code Ch. 9.01 Building Code

Manhattan Beach Municipal Code · 2026-10 edition · updated 2026-10-04 · Manhattan Beach

Cite as: Manhattan Beach Municipal Code Chapter 9.01 · Text as of 2026-10-04

Footnotes:

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Editor's note— Ord. No. 19-0015, eff. January 1, 2020, in effect repealed ch. 9.01, §§ 9.01.010—9.01.110 and enacted new ch. 9.01 as set out herein. Former ch. 9.01 pertained to similar subject matter and derived from § 2, Ord. 16-0032, eff. January 7, 2017 and § 2, Ord. 17-0021, eff. November 17, 2017.

9.01.010 - Adoption of the 2022 California Building Code.

Pursuant to the provisions of Section 50022.1 to 50022.10, inclusive, of the Government Code of the State and subject to the particular additions, deletions and amendments set forth in this chapter, the rules, regulations, provisions and conditions set forth in that certain Code entitled the "2022 California Building Code," including the Appendices F, J, and N and Standards (including Chapter/Section 1, Division 2; Chapter 31B and excluding all other Appendices) therein contained, promulgated and published by the International Code Council and the California Building Standards Commission, one (1) full printed copy of which, printed as a Code in book form were by the Council ordered filed and which have been filed in the office of the City Clerk, expressly incorporated herein and made a part hereof as fully and for all intents and purposes as though set forth herein at length, are hereby established and adopted as the rules, regulations, provisions and conditions to be observed and followed in the construction, alteration, improvements, movement, enlargement, replacement, repair, equipment, use and occupancy, location, maintenance, removal, demolition, conversion, area and height, of buildings or structures or any appurtenances connected or attached to such buildings or structures in the City; and subject to the additions, deletions and amendments set forth in this chapter, said Code with its Appendices F, J, and N and the said Standards containing said rules, regulations, standards, provisions and conditions is hereby established and adopted by reference, and the same shall be designated, known and referred to as the "Building Code" of and for the City.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Exceptions & meaning →

9.01.020 - Referenced codes.

Section [A] 101.4 is amended to add a second paragraph as follows:

The most recently adopted California State and Manhattan Beach Municipal Code will take precedence.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Exceptions & meaning →

9.01.030 - Work exempt from permit.

Section [A] 105.2, Building Item 2, is hereby amended to read as follows:

  1. Fences not over 6 feet (1829 mm) high.

Section [A] 105.2, Building Item 9, is hereby amended to read as follows:

  1. Prefabricated swimming pools accessory to Group R-3 occupancy that are less than 18 inches (457 mm) deep, do not exceed 5,000 gallons (18925 L) and are installed entirely above ground.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Exceptions & meaning →

9.01.040 - Expiration of plan review.

Section [A]105.3.2 is hereby amended to read as follows:

[A]105.3.2 Time limitation of application. Applications for which no permit is issued within 12 months following the date of application shall expire by limitation and plans and other data submitted for review may thereafter be returned to the applicant or destroyed by the Building Official. The Building Official may extend the time for action by applicant for periods not exceeding 180 days upon written request by the applicant and justifiable cause demonstrated. No application shall be extended more than two years from original submittal date. In order to renew action on an application after expiration, the applicant shall resubmit plans and pay a new plan review fee and plans shall be reviewed under the current codes and ordinances at the time of the new applications.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Exceptions & meaning →

9.01.050 - Permit expiration.

Section [A] 105.5 is hereby amended to read as follows:

[A]105.5 Expiration. Every permit issued shall become invalid unless the work on the site authorized by such permit is commenced within 12 months after its issuance, or if the work authorized on the site by such permit is suspended or abandoned for a period of 180 days after the work is commenced, or if the building or work authorized by such permit is not completed within 2 calendar years from the issuance date of the permit without the issuance of a permit renewal or extension.

Before such work can be recommenced, a new permit, or a renewed permit as specified below, shall be first obtained. No permit shall be valid for more than 4 years.

For permits where work has not commenced within 12 months from the date of such permit, a renewed permit may be obtained provided that: (1) no changes have been made or will be required in the original plans and specifications for such work; and (2) the expiration has not exceeded two years from the original issuance date.

For permits where work had commenced and was subsequently suspended or abandoned for a period exceeding 180 days, a renewed permit may be obtained provided that: (1) No changes have been made or will be required in the original plans and specifications for such work; and (2) the expiration has not exceeded four years from the issuance date, and/or (3) where construction has progressed and has been approved, to the point whereby only a final inspection(s) is required, a fee shall be determined based on the number of estimated inspections, estimated staff time, and required meetings as determined by the Building Official.

For permits that have exceeded two years beyond the issuance date and have not received an extension prior to expiring, a new permit is required. The applicant shall pay the fee based on the remaining amount of uncompleted work required for a plan check and a new permit and plans will be reviewed under the current codes and ordinances at the time of the new applications.

Any permittee holding an unexpired permit may apply for an extension of the time within which work under that permit may be continued when, for good and satisfactory reasons, the permittee is unable to continue work within the time required by this section. The Building Official may grant one or more extensions for periods not exceeding 180 days upon written request by the permittee showing that circumstances beyond the control of the permittee have prevented completion of the project. No permit shall be valid for more than 4 years.

If the owner or applicant fails to complete the construction work within the time required, the Building Official is authorized to obtain the abatement of any unsafe condition or nuisance created by such incomplete work. The City Attorney is authorized to file an action for the abatement of any such unsafe condition or nuisance if required to do so by the Building Official.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Exceptions & meaning →

9.01.060 - Fees.

Section [A] 109.2 is hereby amended to read as follows:

[A] 109.2 Schedule of permit fees. The fees shall be determined by the most current City Comprehensive User Fee Schedule.

Plan Review Fees. When submittal documents are required by the Building Official, a plan review fee shall be paid at the time of submitting the submittal documents for plan review. Said plan review fee shall be determined by the most current City Comprehensive User Fee Schedule.

The plan review fees specified in this section are separate and in addition to any permit fees required.

When submittal documents are incomplete or changed so as to require additional plan review or when the project involves deferred submittal items as defined in Section [A] 107.3.4.1, an additional plan review fee shall be charged as determined by the most current City Comprehensive User Fee Schedule.

Section [A] 109.4 is amended to read as follows:

[A] 109.4 Work commencing before permit issuance. Any person who commences any work on a building, structure, electrical, gas, mechanical or plumbing system before obtaining the necessary permits shall be subject to a fee established by the Building Official and the most current City Comprehensive User Fee Schedule in addition to the required permit fees.

Investigation. Whenever any work for which a permit is required by this code has been commenced without first obtaining said permit, a special investigation may be required before a permit may be issued for such work.

Investigation Fee. An investigation fee, in addition to the permit fee, shall be collected whether or not a permit is then or subsequently issued. The investigation fee shall be equal up to the amount of the permit fee required by this code as determined by the Building Official. The investigation fee shall be determined by the most current City Comprehensive User Fee Schedule. The payment of such investigation fee shall not exempt any person from compliance with all other provisions of this code nor from any penalty prescribed by law.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Exceptions & meaning →

9.01.070 - Definitions.

Section 202 is amended by adding two definitions to read as follows:

ABANDONED OR SUSPENDED WORK. Work that has been stopped or no progress in construction and no inspection is required or performed for a period of 180 days.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Exceptions & meaning →

9.01.080 - Fire sprinkler requirements.

Section [F] 903.2 is hereby amended to read as follows:

[F] 903.2 Where required. An approved automatic sprinkler system is required to be installed in all newly constructed buildings, without regard to floor area or area separation walls except in residential occupancies.

An approved automatic sprinkler systems in existing building and structures shall be provided under the following conditions:

  1. Throughout any existing building, whenever an additional story is added.

  2. A remodel causes the tenant space to exceed 2,000 square feet in area and the remodel is over fifty percent of the existing building footprint.

  3. The building is 2,000 square feet or greater in gross floor area and a remodel or addition causes more than twenty-five percent of the walls or roof system to be structurally altered.

  4. The building is 2,000 square feet or greater in gross floor area and the addition increases the existing floor area by more than fifty percent.

(§ 2, Ord. 22-0008, eff. January 1, 2023)

Editor's note— Ord. 22-0008, § 2, eff. January 1, 2023, renumbered §§ 9.01.080 and 9.01.090 as §§ 9.01.090 and 9.01.100.

Exceptions & meaning →

9.01.090 - Roofing and re-roofing.

Table 1505.1 is amended by replacing all roof classifications of "C" with class "B" roof classifications. Sections 1505.1 is amended by adding a sentence to the end of each section that reads as follows:

Fire-retardant roofs are roofing assemblies complying with California Building Code Standards and listed as Class A or B roofs. The use of fire-retardant wood shakes or fire retardant wood shingles is prohibited.

Section 1505.5 is amended to read as follows:

[BF] 1505.5 Nonclassified Roofing. Non-classified roofing is approved material that is not listed as a Class A or B roofing assembly. The use of wood shakes or wood shingles is prohibited.

Sections 1505.4, 1505.6, 1507.8, 1507.9 are deleted.

Section 1507.1 is amended by adding a sentence to the end of the section to read as follows:

Fire-retardant roofs are roofing assemblies complying with California Building Code Standards and listed as Class A or B roofs. The use of fire-retardant wood shakes or fire retardant wood shingles is prohibited.

Section 1507.3.1 is amended to read as follows:

1507.3.1 Deck requirements. Concrete and clay tile shall be installed only over solid sheathing.

Exception: Spaced lumber shall be permitted in Seismic Design Categories A, B, and C.

Section 1511.1 is amended by adding Exception 3 to read as follows:

Exception 3. Wood shakes and wood shingles re-roofs of entire structure are prohibited unless approved by the building official because of special circumstances.

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Editor's note— See editor's note, § 9.01.080.

Exceptions & meaning →

9.01.100 - General structural design provisions.

The following sections are hereby amended to read as follows:

Sections 1613.5 and 1613.5.1 are added to Chapter 16 of the 2022 Edition of the California Building Code to read as follows:

1613.5 Amendments to ASCE 7. The provisions of Section 1613.5 shall be permitted as an amendment to the relevant provisions of ASCE 7.

1613.5.1 Values for vertical combinations. Modify ASCE 7 Section 12.2.3.1 Exception 3 as follows:

  1. Detached one- and two-family dwellings up to two stories in height of light frame construction.

Section 1613.5.2 is added to Chapter 16 of the 2022 Edition of the California Building Code to read as follows:

1613.5.2 Wood diaphragms. Modify ASCE 7 Section 12.11.2.2.3 as follows:

12.11.2.2.3 Wood diaphragms. The anchorage of concrete or masonry structural walls to wood diaphragms shall be in accordance with AWC SDPWS 4.1.5.1 and this section. Continuous ties required by this section shall be in addition to the diaphragm sheathing. Anchorage shall not be accomplished by use of toenails or nails subject to withdrawal, nor shall wood ledgers or framing be used in cross-grain bending or cross-grain tension. The diaphragm sheathing shall not be considered effective for providing the ties or struts required by this section

For structures assigned to Seismic Design Category D, E or F, wood diaphragms supporting concrete or masonry walls shall comply with the following:

  1. The spacing of continuous ties shall not exceed 40 feet. Added chords of diaphragms may be used to form subdiaphragms to transmit the anchorage forces to the main continuous crossties.

  2. The maximum diaphragm shear used to determine the depth of the subdiaphragm shall not exceed 75% of the maximum diaphragm shear.

Section 1613.5.3 is added to Chapter 16 of the 2022 Edition of the California Building Code to read as follows:

1613.5.3 Structural separation. Modify ASCE 7 Section 12.12.3 Equation 12.12-1 as follows:

[Figure]

Section 1613.7 is added to Chapter 16 of the 2022 Edition of the California Building Code to read as follows:

1613.7 Suspended ceilings. Minimum design and installation standards for suspended ceilings shall be determined in accordance with the requirements of Section 2506.2.1 of this Code and this section.

1613.7.1 Scope. This part contains special requirements for suspended ceilings and lighting systems. Provisions of Section 13.5.6 of ASCE 7 shall apply except as modified herein.

1613.7.2 General. The suspended ceilings and lighting systems shall be limited to 6 feet (1828 mm) below the structural deck unless the lateral bracing is designed by a licensed engineer or architect.

1613.7.3 Sprinkler heads. All sprinkler heads (drops) except fire-resistance-rated floor/ceiling or roof/ceiling assemblies, shall be designed to allow for free movement of the sprinkler pipes with oversize rings, sleeves or adaptors through the ceiling tile. Sprinkler heads and other penetrations shall have a 2 inch (50mm) oversize ring, sleeve, or adapter through the ceiling tile to allow for free movement of at least 1 inch (25mm) in all horizontal directions. Alternatively, a swing joint that can accommodate 1 inch (25 mm) of ceiling movement in all horizontal directions is permitted to be provided at the top of the sprinkler head extension.

Sprinkler heads penetrating fire-resistance-rated floor/ceiling or roof/ceiling assemblies shall comply with Section 714 of this Code.

1613.7.4 Special requirements for means of egress. Suspended ceiling assemblies located along means of egress serving an occupant load of 30 or more and at lobbies accessory to Group A Occupancies shall comply with the following provisions.

1613.7.4.1 General. Ceiling suspension systems shall be connected and braced with vertical hangers attached directly to the structural deck along the means of egress serving an occupant load of 30 or more and at lobbies accessory to Group A Occupancies. Spacing of vertical hangers shall not exceed 2 feet (610 mm) on center along the entire length of the suspended ceiling assembly located along the means of egress or at the lobby.

1613.7.4.2 Assembly device. All lay-in panels shall be secured to the suspension ceiling assembly with two hold-down clips minimum for each tile within a 4-foot (1219 mm) radius of the exit lights and exit signs.

1613.7.4.3 Emergency systems. Independent supports and braces shall be provided for light fixtures required for exit illumination. Power supply for exit illumination shall comply with the requirements of Section 1008.3 of this Code.

1613.7.4.4 Supports for appendage. Separate support from the structural deck shall be provided for all appendages such as light fixtures, air diffusers, exit signs, and similar elements.

Section 1704.6 of the 2022 Edition of the California Building Code is amended to read as follows:

1704.6 Structural observations. Where required by the provisions of Section 1704.6.1, the owner or the owner's authorized agent shall employ a structural observer to perform structural observations. The structural observer shall visually observe representative locations of structural systems, details and load paths for general conformance to the approved construction documents. Structural observation does not include or waive the responsibility for the inspections in Section 110 or the special inspections in Section 1705 or other sections of this code. The structural observer shall be one of the following individuals:

  1. The registered design professional responsible for the structural design, or

  2. A registered design professional designated by the registered design professional responsible for the structural design.

Prior to the commencement of observations, the structural observer shall submit to the building official a written statement identifying the frequency and extent of structural observations.

The owner or owner's authorized agent shall coordinate and call a preconstruction meeting between the structural observer, contractors, affected subcontractors and special inspectors. The structural observer shall preside over the meeting. The purpose of the meeting shall be to identify the major structural elements and connections that affect the vertical and lateral load resisting systems of the structure and to review scheduling of the required observations. A record of the meeting shall be included in the report submitted to the building official. Observed deficiencies shall be reported in writing to the owner or owner's authorized agent, special inspector, contractor and the building official. Upon the form prescribed by the building official, the structural observer shall submit to the building official a written statement at each significant construction stage stating that the site visits have been made and identifying any reported deficiencies which, to the best of the structural observer's knowledge, have not been resolved. A final report by the structural observer which states that all observed deficiencies have been resolved is required before acceptance of the work by the building official.

Section 1704.6.1 of the 2022 Edition of the California Building Code is amended to read as follows:

1704.6.1 Structural observations for structures. Structural observations shall be provided for those structures where one or more of the following conditions exist:

  1. The structure is classified as Risk Category III or IV.

  2. The structure is a high-rise building.

  3. A lateral design is required for the structure or portion thereof.

Exception: One-story wood framed Group R-3 and Group U Occupancies less than 2,000 square feet in area, provided the adjacent grade is not steeper than 1 unit vertical in 10 units horizontal (10% sloped), assigned to Seismic Design Category D.

  1. Such observation is required by the registered design professional responsible for the structural design.

  2. Such observation is specifically required by the building official.

Section 1705.3 of the 2022 Edition of the California Building Code is amended to read as follows:

1705.3 Concrete construction. Special inspections and tests of concrete construction shall be performed in accordance with this section and Table 1705.3.

Exceptions: Special inspections and tests shall not be required for:

  1. Isolated spread concrete footings of buildings three stories or less above grade plane that are fully supported on earth or rock where the structural design of the footing is based on a specified compressive strength, f'c, not more than 2,500 pounds per square inch (psi) (17.2 Mpa) regardless of the compressive strength specified in the construction documents or used in the footing construction.

  2. Continuous concrete footings supporting walls of buildings three stories or less above grade plane that are fully supported on earth or rock where:

2.1.

The footings support walls of light-frame construction;

2.2.

The footings are designed in accordance with Table 1809.7; or

2.3.

The structural design of the footing is based on a specified compressive strength, f'c, not more than 2,500 pounds per square inch (psi) (17.2 Mpa), regardless of the compressive strength specified in the construction documents or used in the footing construction.

  1. Nonstructural concrete slabs supported directly on the ground, including prestressed slabs on grade, where the effective prestress in the concrete is less than 150 psi (1.03 Mpa).

  2. Concrete patios, driveways and sidewalks, on grade.

Section 1705.13 of the 2022 Edition of the California Building Code is amended to read as follows:

1705.13 Special inspections for seismic resistance. Special inspections for seismic resistance shall be required as specified in Sections 1705.13.1 through 1705.13.9, unless exempted by the exceptions of Section 1704.2.

Exception: The special inspections specified in Sections 1705.13.1 through 1705.13.9 are not required for structures designed and constructed in accordance with one of the following:

  1. The structure consists of light-frame construction; the design spectral response acceleration at short periods, SDS, as determined in Section 1613.2.4, does not exceed 0.5; and the building height of the structure does not exceed 35 feet (10 668 mm).

  2. The seismic force-resisting system of the structure consists of reinforced masonry or reinforced concrete; the design spectral response acceleration at short periods, SDS, as determined in Section 1613.2.4, does not exceed 0.5; and the building height of the structure does not exceed 25 feet (7620 mm)

  3. The structure is a detached one- or two-family dwelling not exceeding two stories above grade plane, is not assigned to Seismic Design Category D, E or F, and does not have any of the following horizontal or vertical irregularities in accordance with Section 12.3 of ASCE 7:

3.1

Torsional or extreme torsional irregularity.

3.2

Nonparallel systems irregularity.

3.3

Stiffness-soft story or stiffness-extreme soft story irregularity.

3.4

Discontinuity in lateral strength-weak story irregularity.

Section 1807.1.4 of the 2022 Edition of the California Building Code is amended to read as follows:

1807.1.4 Permanent wood foundation systems. Permanent wood foundation systems shall be designed and installed in accordance with AWC PWF. Lumber and plywood shall be treated in accordance with AWPA U1 (Commodity Specification A, Special Requirement 4.2) and shall be identified in accordance with Section 2303.1.9.1. Permanent wood foundation systems shall not be used for structures assigned to Seismic Design Category D, E or F.

Section 1807.1.6 of the 2022 Edition of the California Building Code is amended to read as follows:

1807.1.6 Prescriptive design of concrete and masonry foundation walls. Concrete and masonry foundation walls that are laterally supported at the top and bottom shall be permitted to be designed and constructed in accordance with this section. Prescriptive design of foundation walls shall not be used for structures assigned to Seismic Design Category D, E or F.

Section 1807.2 of the 2022 Edition of the California Building Code is amended to read as follows:

1807.2 Retaining walls. Retaining walls shall be designed in accordance with Section 1807.2.1 through 1807.2.4. Retaining walls assigned to Seismic Design Category D, E or F shall not be partially or wholly constructed of wood.

Section 1807.3.1 of the 2022 Edition of the California Building Code is amended to read as follows:

1807.3.1 Limitations. The design procedures outlined in this section are subject to the following limitations:

  1. The frictional resistance for structural walls and slabs on silts and clays shall be limited to one-half of the normal force imposed on the soil by the weight of the footing or slab.

  2. Posts embedded in earth shall not be used to provide lateral support for structural or nonstructural materials such as plaster, masonry or concrete unless bracing is provided that develops the limited deflection required.

Wood poles shall be treated in accordance with AWPA U1 for sawn timber posts (Commodity Specification A, Use Category 4B) and for round timber posts (Commodity Specification B, Use Category 4B). Wood poles and posts embedded in direct contact with soil shall not be used for structures assigned to Seismic Design Category D, E or F.

Exception: Wood poles and posts embedded in direct contact with soil may be used to support nonhabitable, nonoccupiable structures such as fences when approved by the building official.

Section 1809.3 of the 2022 Edition of the California Building Code is amended to read as follows:

1809.3 Stepped footings. The top surface of footings shall be level. The bottom surface of footings shall be permitted to have a slope not exceeding one unit vertical in 10 units horizontal (10-percent slope). Footings shall be stepped where it is necessary to change the elevation of the top surface of the footing or where the surface of the ground slopes more than one unit vertical in 10 units horizontal (10-percent slope).

For structures assigned to Seismic Design Category D, E or F, the stepping requirement shall also apply to the top surface of continuous footings supporting walls. Footings shall be reinforced with four No. 4 deformed reinforcing bars. Two bars shall be placed at the top and bottom of the footings as shown in Figure 1809.3.

[Figure: FIGURE 1809.3 STEPPED FOOTING]

FIGURE 1809.3 STEPPED FOOTING

Section 1809.7 and Table 1809.7 of the 2022 Edition of the California Building Code are amended to read as follows:

1809.7 Prescriptive footings for light-frame construction. Where a specific design is not provided, concrete or masonry-unit footings supporting walls of light-frame construction shall be permitted to be designed in accordance with Table 1809.7. Light-frame construction using prescriptive footings in Table 1809.7 shall not exceed one story above grade plane for structures assigned to Seismic Design Category D, E or F.

TABLE 1809.7 PRESCRIPTIVE FOOTINGS SUPPORTING WALLS OF LIGHT-FRAME CONSTRUCTIONa, b, c, d, e

Number of floors supported by the footing f Width of footing (inches) Thickness of footing (inches)
1 12 6
2 15 6
3 18 8

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm

a. Depth of footings shall be in accordance with Section 1809.4.

b. The ground under the floor shall be permitted to be excavated to the elevation of the top of the footing.

c. Not Adopted.

d. See Section 1905 for additional requirements for concrete footings of structures assigned to Seismic Design Category C, D, E or F.

e. For thickness of foundation walls, see Section 1807.1.6.

f. Footings shall be permitted to support a roof addition to the stipulated number of floors. Footings supporting roof only shall be as required for supporting one floor.

Section 1809.12 of the 2022 Edition of the California Building Code is amended to read as follows:

1809.12 Timber footings. Timber footings shall be permitted for buildings of Type V construction and as otherwise approved by the Building Official. Such footings shall be treated in accordance with AWPA U1 (Commodity Specification A, Use Category 4B). Treated timbers are not required where placed entirely below permanent water level, or where used as capping for wood piles that project above the water level over submerged or marsh lands. The compressive stresses perpendicular to grain in untreated timber footings supported on treated piles shall not exceed 70 percent of the allowable stresses for the species and grade of timber as specified in the ANSI/AWC NDS. Timber footings shall not be used in structures assigned to Seismic.

Section 1810.3.2.4 of the 2022 Edition of the California Building Code is amended to read as follows:

1810.3.2.4 Timber. Timber deep foundation elements shall be designed as piles or poles in accordance with ANSI/AWC NDS. Round timber elements shall conform to ASTM D 25. Sawn timber elements shall conform to DOC PS-20. Timber deep foundation elements shall not be used in structures assigned to Seismic Design Category D, E or F.

Section 1905.1.7 of the 2022 Edition of the California Building Code is amended to read as follows:

1905.1.7 ACI 318, Section 14.1.4. Delete ACI 318, Section 14.1.4, and replace with the following:

14.1.4 - Plain concrete in structures assigned to Seismic Design Category C, D, E or F.

14.1.4.1 - Structures assigned to Seismic Design Category C, D, E or F shall not have elements of structural plain concrete, except as follows:

(a) Concrete used for fill with a minimum cement content of two (2) sacks of Portland cement or cementious material per cubic yard.

(b) Isolated footings of plain concrete supporting pedestals or columns are permitted, provided the projection of the footing beyond the face of the supported member does not exceed the footing thickness.

(c) Plain concrete footings supporting walls are permitted, provided the footings have at least two continuous longitudinal reinforcing bars. Bars shall not be smaller than No. 4 and shall have a total area of not less than 0.002 times the gross cross-sectional area of the footing. A minimum of one bar shall be provided at the top and bottom of the footing. Continuity of reinforcement shall be provided at corners and intersections.

Exception:

Detached one- and two-family dwellings three stories or less in height and constructed with stud-bearing walls, are permitted to have plain concrete footings with at least two continuous longitudinal reinforcing bars not smaller than No. 4 and are permitted to have a total area of longitudinal reinforcement less than 0.002 times the gross cross-sectional area of the footing.

Section 1905.1 is amended and Sections 1905.1.9 thru 1905.1.11 are added to Chapter 19 of the 2022 Edition of the California Building Code to read as follows:

1905.1 General. The text of ACI 318 shall be modified as indicated in Sections 1905.1.1 through 1905.1.11.

1905.1.9 ACI 318, Section 18.7.5. Modify ACI 318, Section 18.7.5, by adding Section 18.7.5.8 and 18.7.5.9 as follows:

18.7.5.8 Where the calculated point of contraflexure is not within the middle half of the member clear height, provide transverse reinforcement as specified in ACI 318 Sections 18.7.5.1, Items (a) through (c), over the full height of the member.

18.7.5.9 At any section where the design strength, ØPn, of the column is less than the sum of the shears Vecomputed in accordance with ACI 318 Sections 18.7.6.1 and 18.6.5.1 for all the beams framing into the column above the level under consideration, transverse reinforcement as specified in ACI 318 Sections 18.7.5.1 through 18.7.5.3 shall be provided. For beams framing into opposite sides of the column, the moment components are permitted to be assumed to be of opposite sign. For the determination of the design strength, ØPn, of the column, these moments are permitted to be assumed to result from the deformation of the frame in any one principal axis.

1905.1.10 ACI 318, Section 18.10.4. Modify ACI 318, Section 18.10.4, by adding Section 18.10.4.7 as follows:

18.10.4.7 - Walls and portions of walls with Pu> 0.35Poshall not be considered to contribute to the calculated shear strength of the structure for resisting earthquake-induced forces. Such walls shall conform to the requirements of ACI 318 Section 18.14.

1905.1.11 ACI 318, Section 18.12.6. Modify ACI 318, by adding Section 18.12.6.2 as follows:

18.12.6.2 Collector and boundary elements in topping slabs placed over precast floor and roof elements shall not be less than 3 inches (76 mm) or 6 dbin thickness, where dbis the diameter of the largest reinforcement in the topping slab.

Section 2304.10.2 of the 2022 Edition of the California Building Code is amended to read as follows:

2304.10.2 Fastener requirements. Connections for wood members shall be designed in accordance with the appropriate methodology in Section 2302.1. The number and size of fasteners connecting wood members shall not be less than that set forth in Table 2304.10.2. Staple fasteners in Table 2304.10.2 shall not be used to resist or transfer seismic forces in structures assigned to Seismic Design Category D, E or F.

Exception: Staples may be used to resist or transfer seismic forces when the allowable shear values are substantiated by cyclic testing and approved by the building official.

Section 2304.10.3.1 is added to Chapter 23 of the 2022 Edition of the California Building Code to read as follows:

2304.10.3.1 Quality of nails. In Seismic Design Category D, E or F, mechanically driven nails used in wood structural panel shear walls shall meet the same dimensions as that required for hand-driven nails, including diameter, minimum penetration and minimum head diameter. Clipped head or box nails are not permitted in new construction. The allowable design value for clipped head nails in existing construction shall be multiplied by the nail-head-area ratio of clipped head nails to that of the same size hand-driven nails.

Section 2304.12.2.8 of the 2022 Edition of the California Building Code is amended to read as follows:

2304.12.2.8 Wood used in retaining walls and cribs. Wood installed in retaining or crib walls shall be preservative treated in accordance with AWPA U1 for soil and fresh water use. Wood shall not be used in retaining or crib walls for structures assigned to Seismic Design Category D, E or F.

Section 2305.4 is added to Chapter 23 of the 2022 Edition of the California Building Code to read as follows:

2305.4 Hold-down connectors. In Seismic Design Category D, E or F, hold-down connectors shall be designed to resist shear wall overturning moments using approved cyclic load values or 75 percent of the allowable seismic load values that do not consider cyclic loading of the product. Connector bolts into wood framing shall require steel plate washers on the post on the opposite side of the anchorage device. Plate size shall be a minimum of 0.229 inch by 3 inches by 3 inches (5.82 mm by 76 mm by 76 mm) in size. Hold-down connectors shall be tightened to finger tight plus one half (½) wrench turn just prior to covering the wall framing.

Section 2306.2 of the 2022 Edition of the California Building Code is amended to read as follows:

2306.2 Wood-frame diaphragms. Wood-frame diaphragms shall be designed and constructed in accordance with AWC SDPWS. Where panels are fastened to framing members with staples, requirements and limitations of AWC SDPWS shall be met and the allowable shear values set forth in Table 2306.2(1) or 2306.2(2) shall only be permitted for structures assigned to Seismic Design Category A, B, or C.

Exception: Allowable shear values where panels are fastened to framing members with staples may be used if such values are substantiated by cyclic testing and approved by the building official.

The allowable shear values in Tables 2306.2(1) and 2306.2(2) are permitted to be increased 40 percent for wind design.

Wood structural panels used to resist seismic diaphragm forces in structures assigned to Seismic Design Category D, E or F shall be applied directly to the framing members.

Exception: Wood structural panels are permitted to be fastened over solid lumber planking or laminated decking, provided the panel joints and lumber planking or laminated decking joints do not coincide.

Section 2306.3 of the 2022 Edition of the California Building Code is amended to read as follows:

2306.3 Wood-frame shear walls. Wood-frame shear walls shall be designed and constructed in accordance with ANSI/AWC SDPWS. For structures assigned to Seismic Design Category D, E, or F, application of Table 4.3A of ANSI/AWC SDPWS shall include the following:

  1. Wood structural panel thickness for shear walls shall not be less than ⅜ inch thick and studs shall not be spaced at more than 16 inches on center.

  2. The maximum nominal unit shear capacities for ⅜ inch wood structural panels resisting seismic forces in structures assigned to Seismic Design Category D, E or F is 400 pounds per linear foot (plf).

Exception: Other nominal unit shear capacities may be permitted if such values are substantiated by cyclic testing and approved by the building official.

  1. Nails shall be placed not less than ½ inch in from the panel edges and not less than ⅜ inch from the edge of the connecting members for shear greater than 350 plf using ASD or 500 plf using LRFD. Nails shall be placed not less than ⅜ inch from panel edges and not less than ¼ inch from the edge of the connecting members for shears of 350 plf or less using ASD or 500 plf or less using LRFD.

For structures assigned to Seismic Design Category D, E or F, application of Table 4.3B of ANSI/AWC SDPWS shall not be allowed.

For structures assigned to Seismic Design Category D, E or F, application of Table 4.3C of ANSI/AWC SDPWS shall not be used below the top level in a multi-level building.

Where panels are fastened to framing members with staples, requirements and limitations of AWC SDPWS shall be met and the allowable shear values set forth in Table 2306.3(1), 2306.3(2) or 2306.3(3) shall only be permitted for structures assigned to Seismic Design Category A, B, or C.

Exception: Allowable shear values where panels are fastened to framing members with staples may be used if such values are substantiated by cyclic testing and approved by the building official.

The allowable shear values in Tables 2306.3(1) and 2306.3(2) are permitted to be increased 40 percent for wind design. Panels complying with ANSI/APA PRP-210 shall be permitted to use design values for Plywood Siding in the ANSI/AWC SDPWS.

Section 2307.2 is added to the 2022 Edition of the California Building Code to read as follows:

2307.2 Wood-frame shear walls. Wood-frame shear walls shall be designed and constructed in accordance with Section 2306.3 as applicable.

Table 2308.6.1 of the 2022 Edition of the California Building Code is amended to read as follows:

TABLE 2308.6.1 a WALL BRACING REQUIREMENTS

Seismic design category Story condition (see section 2308.2) Maximum spacing of braced wall lines Braced panel location, spacing (o.c.) and minimum percentage (X) Braced panel location, spacing (o.c.) and minimum percentage (X) Braced panel location, spacing (o.c.) and minimum percentage (X) Maximum distance of braced wall panels from each end of braced wall line
Seismic design category Story condition (see section 2308.2) Maximum spacing of braced wall lines Bracing method b Bracing method b Bracing method b Maximum distance of braced wall panels from each end of braced wall line
Seismic design category Story condition (see section 2308.2) Maximum spacing of braced wall lines LIB DWB, WSP SFB, PBS, PCP, HPS, GB c,d Maximum distance of braced wall panels from each end of braced wall line
A, B 35'-0" Each end and ≤25'-0" o.c. Each end and ≤ 25'-0" o.c. Each end and ≤ 25'-0" o.c. 12'-6"
A, B 35'-0" Each end and ≤ 25'-0" o.c. Each end and ≤ 25'-0" o.c. Each end and ≤ 25'-0" o.c. 12'-6"
A, B 35'-0" NP Each end and ≤ 25'-0" o.c. Each end and ≤ 25'-0" o.c. 12'-6"
C 35'-0" NP Each end and ≤ 25'-0" o.c. Each end and ≤ 25'-0" o.c. 12'-6"
C 35'-0" NP Each end and ≤ 25'-0" o.c. (minimum 25% of wall length) e Each end and ≤ 25'-0" o.c. (minimum 25% of wall length) e 12'-6"
D, E f, g, h 25'-0" NP S DS < 0.50: Each end and ≤ 25'-0" o.c. (minimum 21% of wall length) e S DS < 0.50: Each end and ≤ 25'-0" o.c. (minimum 43% of wall length) e 8'-0"
D, E f, g, h 25'-0" NP 0.5 ≤ S DS < 0.75: Each end and ≤ 25'-0" o.c. (minimum 32% of wall length) e 0.5 ≤ S DS < 0.75: Each end and ≤ 25'-0" o.c. (minimum 59% of wall length) e 8'-0"
D, E f, g, h 25'-0" NP 0.75 ≤ S DS ≤ 1.00: Each end and ≤ 25'-0" o.c. (minimum 37% of wall length) e 0.75 ≤ S DS ≤ 1.00: Each end and ≤ 25'-0" o.c. (minimum 75% of wall length) 8'-0"
D, E f, g, h 25'-0" NP S DS > 1.00: Each end and ≤ 25'-0" o.c. (minimum 48% of wall length) e S DS > 1.00: Each end and ≤ 25'-0" o.c. (minimum 100% of wall length) e 8'-0"
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. NP = Not Permitted. a This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines. b See Section 2308.6.3 for full description of bracing methods. c For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center. d The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel. e Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape). f DWB, SFB, PBS, and HPS wall braces are not permitted in Seismic Design Categories D or E. g Minimum length of panel bracing of one face of the wall for WSP sheathing shall be at least 4'-0" long or both faces of the wall for GB or PCP sheathing shall be at least 8'-0" long; h/w ratio shall not exceed 2:1. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [actual 1½ inch (38 mm) or larger members and spaced a maximum of 16 inches on center. Braced wall panel construction types shall not be mixed within a braced wall line. h WSP sheathing shall be a minimum of 15/32 " thick nailed with 8d common placed ⅜ inches from panel edges and spaced not more than 6 inches on center and 12 inches on center along intermediate framing members. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. NP = Not Permitted. a This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines. b See Section 2308.6.3 for full description of bracing methods. c For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center. d The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel. e Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape). f DWB, SFB, PBS, and HPS wall braces are not permitted in Seismic Design Categories D or E. g Minimum length of panel bracing of one face of the wall for WSP sheathing shall be at least 4'-0" long or both faces of the wall for GB or PCP sheathing shall be at least 8'-0" long; h/w ratio shall not exceed 2:1. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [actual 1½ inch (38 mm) or larger members and spaced a maximum of 16 inches on center. Braced wall panel construction types shall not be mixed within a braced wall line. h WSP sheathing shall be a minimum of 15/32 " thick nailed with 8d common placed ⅜ inches from panel edges and spaced not more than 6 inches on center and 12 inches on center along intermediate framing members. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. NP = Not Permitted. a This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines. b See Section 2308.6.3 for full description of bracing methods. c For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center. d The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel. e Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape). f DWB, SFB, PBS, and HPS wall braces are not permitted in Seismic Design Categories D or E. g Minimum length of panel bracing of one face of the wall for WSP sheathing shall be at least 4'-0" long or both faces of the wall for GB or PCP sheathing shall be at least 8'-0" long; h/w ratio shall not exceed 2:1. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [actual 1½ inch (38 mm) or larger members and spaced a maximum of 16 inches on center. Braced wall panel construction types shall not be mixed within a braced wall line. h WSP sheathing shall be a minimum of 15/32 " thick nailed with 8d common placed ⅜ inches from panel edges and spaced not more than 6 inches on center and 12 inches on center along intermediate framing members. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. NP = Not Permitted. a This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines. b See Section 2308.6.3 for full description of bracing methods. c For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center. d The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel. e Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape). f DWB, SFB, PBS, and HPS wall braces are not permitted in Seismic Design Categories D or E. g Minimum length of panel bracing of one face of the wall for WSP sheathing shall be at least 4'-0" long or both faces of the wall for GB or PCP sheathing shall be at least 8'-0" long; h/w ratio shall not exceed 2:1. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [actual 1½ inch (38 mm) or larger members and spaced a maximum of 16 inches on center. Braced wall panel construction types shall not be mixed within a braced wall line. h WSP sheathing shall be a minimum of 15/32 " thick nailed with 8d common placed ⅜ inches from panel edges and spaced not more than 6 inches on center and 12 inches on center along intermediate framing members. For SI: 1 inch = 25.4 mm, 1 foot = 3
04.8 mm. NP = Not Permitted. a This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines. b See Section 2308.6.3 for full description of bracing methods. c For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center. d The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel. e Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape). f DWB, SFB, PBS, and HPS wall braces are not permitted in Seismic Design Categories D or E. g Minimum length of panel bracing of one face of the wall for WSP sheathing shall be at least 4'-0" long or both faces of the wall for GB or PCP sheathing shall be at least 8'-0" long; h/w ratio shall not exceed 2:1. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [actual 1½ inch (38 mm) or larger members and spaced a maximum of 16 inches on center. Braced wall panel construction types shall not be mixed within a braced wall line. h WSP sheathing shall be a minimum of 15/32 " thick nailed with 8d common placed ⅜ inches from panel edges and spaced not more than 6 inches on center and 12 inches on center along intermediate framing members. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. NP = Not Permitted. a This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines. b See Section 2308.6.3 for full description of bracing methods. c For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center. d The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel. e Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape). f DWB, SFB, PBS, and HPS wall braces are not permitted in Seismic Design Categories D or E. g Minimum length of panel bracing of one face of the wall for WSP sheathing shall be at least 4'-0" long or both faces of the wall for GB or PCP sheathing shall be at least 8'-0" long; h/w ratio shall not exceed 2:1. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [actual 1½ inch (38 mm) or larger members and spaced a maximum of 16 inches on center. Braced wall panel construction types shall not be mixed within a braced wall line. h WSP sheathing shall be a minimum of 15/32 " thick nailed with 8d common placed ⅜ inches from panel edges and spaced not more than 6 inches on center and 12 inches on center along intermediate framing members. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. NP = Not Permitted. a This table specifies minimum requirements for braced wall panels along interior or exterior braced wall lines. b See Section 2308.6.3 for full description of bracing methods. c For Method GB, gypsum wallboard applied to framing supports that are spaced at 16 inches on center. d The required lengths shall be doubled for gypsum board applied to only one face of a braced wall panel. e Percentage shown represents the minimum amount of bracing required along the building length (or wall length if the structure has an irregular shape). f DWB, SFB, PBS, and HPS wall braces are not permitted in Seismic Design Categories D or E. g Minimum length of panel bracing of one face of the wall for WSP sheathing shall be at least 4'-0" long or both faces of the wall for GB or PCP sheathing shall be at least 8'-0" long; h/w ratio shall not exceed 2:1. Wall framing to which sheathing used for bracing is applied shall be nominal 2 inch wide [actual 1½ inch (38 mm) or larger members and spaced a maximum of 16 inches on center. Braced wall panel construction types shall not be mixed within a braced wall line. h WSP sheathing shall be a minimum of 15/32 " thick nailed with 8d common placed ⅜ inches from panel edges and spaced not more than 6 inches on center and 12 inches on center along intermediate framing members.

Sections 2308.6.5.1 and 2308.6.5.2 and Figures 2308.6.5.1 and 2308.6.5.2 of the 2022 Edition of the California Building Code are amended to read as follows:

2308.6.5.1 Alternate braced wall (ABW). An ABW shall be constructed in accordance with this section and Figure 2308.6.5.1. In one-story buildings, each panel shall have a length of not less than 2 feet 8 inches (813 mm) and a height of not more than 10 feet (3048 mm). Each panel shall be sheathed on one face with ⅜-inch (3.2 mm) minimum-thickness wood structural panel sheathing nailed with 8d common or galvanized box nails in accordance with Table 2304.10.1 and blocked at wood structural panel edges. For structures assigned to Seismic Design Category D or E, each panel shall be sheathed on one face with 15/32 -inch-minimum-thickness (11.9 mm) wood structural panel sheathing nailed with 8d common nails spaced 3 inches on panel edges, 3 inches at intermediate supports. Two anchor bolts installed in accordance with Section 2308.3.1 shall be provided in each panel. Anchor bolts shall be placed at each panel outside quarter points. Each panel end stud shall have a hold-down device fastened to the foundation, capable of providing an approved uplift capacity of not less than 1,800 pounds (8006 N). The hold-down device shall be installed in accordance with the manufacturer's recommendations. The ABW shall be supported directly on a foundation or on floor framing supported directly on a foundation that is continuous across the entire length of the braced wall line. This foundation shall be reinforced with not less than one No. 4 bar top and bottom. Where the continuous foundation is required to have a depth greater than 12 inches (305 mm), a minimum 12-inch by 12-inch (305 mm by 305 mm) continuous footing or turned down slab edge is permitted at door openings in the braced wall line. This continuous footing or turned down slab edge shall be reinforced with not less than one No. 4 bar top and bottom. This reinforcement shall be lapped 15 24 inches (381 610 mm) with the reinforcement required in the continuous foundation located directly under the braced wall line.

Where the ABW is installed at the first story of two-story buildings, the wood structural panel sheathing shall be provided on both faces, three anchor bolts shall be placed at one-quarter points and tie-down device uplift capacity shall be not less than 3,000 pounds (13 344 N).

[Figure: FIGURE 2308.6.5.1 ALTERNATE BRACED WALL PANEL (ABW)]

FIGURE 2308.6.5.1 ALTERNATE BRACED WALL PANEL (ABW)

2308.6.5.2 Portal frame with hold-downs (PFH). A PFH shall be constructed in accordance with this section and Figure 2308.6.5.2. The adjacent door or window opening shall have a full-length header.

In one-story buildings, each panel shall have a length of not less than 16 inches (406 mm) and a height of not more than 10 feet (3048 mm). Each panel shall be sheathed on one face with a single layer of ⅜-inch (9.5 mm) minimum-thickness wood structural panel sheathing nailed with 8d common or galvanized box nails in accordance with Figure 2308.6.5.2. For structures assigned to Seismic Design Category D or E, each panel shall be sheathed on one face with 15/32 -inch-minimum-thickness (11.9 mm) wood structural panel sheathing nailed with 8d common nails spaced 3 inches on panel edges, 3 inches at intermediate supports and in accordance with Figure 2308.6.5.2. The wood structural panel sheathing shall extend up over the solid sawn or glued-laminated header and shall be nailed in accordance with Figure 2308.6.5.2. A built-up header consisting of at least two 2-inch by 12-inch (51 mm by 305 mm) boards, fastened in accordance with Item 26 of Table 2304.10.2 shall be permitted to be used. A spacer, if used, shall be placed on the side of the built-up beam opposite the wood structural panel sheathing. The header shall extend between the inside faces of the first full-length outer studs of each panel. The clear span of the header between the inner studs of each panel shall be not less than 6 feet (1829 mm) and not more than 18 feet (5486 mm) in length. A strap with an uplift capacity of not less than 1,000 pounds (4,400 N) shall fasten the header to the inner studs opposite the sheathing. One anchor bolt not less than 5/8 inch (15.9 mm) diameter and installed in accordance with Section 2308.3.1 shall be provided in the center of each sill plate. The studs at each end of the panel shall have a hold-down device fastened to the foundation with an uplift capacity of not less than 3,500 pounds (15 570 N).

Where a panel is located on one side of the opening, the header shall extend between the inside face of the first full-length stud of the panel and the bearing studs at the other end of the opening. A strap with an uplift capacity of not less than 1,000 pounds (4400 N) shall fasten the header to the bearing studs. The bearing studs shall also have a hold-down device fastened to the foundation with an uplift capacity of not less than 1,000 pounds (4400 N). The hold-down devices shall be an embedded strap type, installed in accordance with the manufacturer's recommendations. The PFH panels shall be supported directly on a foundation that is continuous across the entire length of the braced wall line. This foundation shall be reinforced with not less than one No. 4 bar top and bottom. Where the continuous foundation is required to have a depth greater than 12 inches (305 mm), a minimum 12-inch by 12-inch (305 mm by 305 mm) continuous footing is permitted at door openings in the braced wall line. This continuous footing shall be reinforced with not less than one No. 4 bar top and bottom. This reinforcement shall be lapped not less than 24 inches (610 mm) with the reinforcement required in the continuous foundation located directly under the braced wall line.

Where a PFH is installed at the first story of two-story buildings, each panel shall have a length of not less than 24 inches (610 mm).

[Figure: FIGURE 2308.6.5.2 PORTAL FRAME WITH HOLD-DOWNS (PFH)]

FIGURE 2308.6.5.2 PORTAL FRAME WITH HOLD-DOWNS (PFH)

Section 2308.6.8.1 of the 2022 Edition of the California Building Code is amended to read as follows:

2308.6.8.1 Foundation requirements. Braced wall lines shall be supported by continuous foundations.

Exception: For structures with a maximum plan dimension not more than 50 feet (15240 mm), continuous foundations are required at exterior walls only for structures assigned to Seismic Design Category A, B, or C.

For structures in Seismic Design Categories D and E, exterior braced wall panels shall be in the same plane vertically with the foundation or the portion of the structure containing the offset shall be designed in accordance with accepted engineering practice and Section 2308.1.1.

Section 2308.6.9 of the 2022 Edition of the California Building Code is amended to read as follows:

2308.6.9 Attachment of sheathing. Fastening of braced wall panel sheathing shall not be less than that prescribed in Tables 2308.6.1 or 2304.10.2. Wall sheathing shall not be attached to framing members by adhesives. Staple fasteners in Table 2304.10.2 shall not be used to resist or transfer seismic forces in structures assigned to Seismic Design Category D, E or F.

Exception: Staples may be used to resist or transfer seismic forces when the allowable shear values are substantiated by cyclic testing and approved by the building official.

All braced wall panels shall extend to the roof sheathing and shall be attached to parallel roof rafters or blocking above with framing clips (18 gauge minimum) spaced at a maximum of 24 inches (6096 mm) on center with four 8d nails per leg (total eight 8d nails per clip, minimum). Braced wall panels shall be laterally braced at each top corner and at intervals not to exceed 24 inches (6096 mm) along the top plate of discontinuous vertical framing.

Section 3115 of the 2022 Edition of the California Building Code is amended to read as follows:

SECTION 3115 INTERMODAL SHIPPING CONTAINERS

3115.1 General. The provisions of Section 3115 and other applicable sections of this code shall apply to intermodal shipping containers that are repurposed for use as buildings or structures or as a part of buildings or structures.

Exceptions:

  1. Intermodal shipping containers previously approved as existing relocatable buildings complying with Chapter 14 of the California Existing Building Code.

  2. Stationary battery storage arrays located in intermodal shipping containers complying with Chapter 12 of the California Fire Code.

  3. Intermodal shipping containers that are listed as equipment complying with the standard for equipment, such as air chillers, engine generators, modular data centers, and other similar equipment.

  4. Intermodal shipping containers housing or supporting experimental equipment are exempt from the requirements of Section 3115, provided they comply with all of the following:

4.1.

Such units will be single stand-alone units supported at grade level and used only for occupancies as specified under Risk Category I in Table 1604.5.

4.2.

Such units are located a minimum of 8 feet (2438 mm) from adjacent structures, and are not connected to a fuel gas system or fuel gas utility.

4.3.

In hurricane-prone regions and flood hazard areas, such units are designed in accordance with the applicable provisions of Chapter 16.

  1. [HCD] Shipping containers constructed or converted off-site that meet the definition of Factory-built Housing in Health and Safety Code Section 19971 or Commercial Modular(s) as defined in Health and Safety Code Section 18001.8 shall be approved by the Department of Housing and Community Development.

  2. Single-unit stand-alone intermodal shipping containers used as temporary storage or construction trailer on active construction sites. Construction support facilities for uses and activities not directly associated with the actual processes of construction, including, but not limited to, offices, meeting rooms, plan rooms, other administrative or support functions shall not be exempt from Section 3115.

3115.2 Construction documents. The construction documents shall contain information to verify the dimensions and establish the physical properties of the steel components and wood floor components of the intermodal shipping container, in addition to the information required by Sections 107 and 1603.

3115.3 Intermodal shipping container information. Intermodal shipping containers shall bear an existing data plate containing the following information as required by ISO 6346 and verified by an approved agency. A report of the verification process and findings shall be provided to the building owner.

  1. Manufacturer's name or identification number.

  2. Date manufactured.

  3. Safety approval number.

  4. Identification number.

  5. Maximum operating gross mass or weight (kg) (lbs).

  6. Allowable stacking load for 1.8G (kg) (lbs).

  7. Transverse racking test force (Newtons).

  8. Valid maintenance examination date.

Where approved by the building official, the markings and existing data plate are permitted to be removed from the intermodal shipping containers before they are repurposed for use as buildings or structures or as part of buildings or structures.

3115.4 Protection against decay and termites. Wood structural floors of intermodal shipping containers shall be protected from decay and termites in accordance with the applicable provisions of Section 2304.12.1.1.

3115.5 Under-floor ventilation. The space between the bottom of the floor joists and the earth under any intermodal shipping container, except spaces occupied by basements and cellars, shall be provided with ventilation in accordance with Section 1202.4.

3115.6 Roof assemblies. Intermodal shipping container roof assemblies shall comply with the applicable requirements of Chapter 15.

Exception: Single-unit, stand-alone intermodal shipping containers not attached to, or stacked vertically over, other intermodal shipping containers, buildings or structures.

3115.7 Joints and voids. Joints and voids that create concealed spaces between intermodal shipping containers, that are connected or stacked, at fire-resistance-rated walls, floor or floor/ceiling assemblies and roofs or roof/ceiling assemblies shall be protected by an approved fire-resistant joint system in accordance with Section 715.

3115.8 Structural. Intermodal shipping containers that conform to ISO 1496-1 and are repurposed for use as buildings or structures, or as a part of buildings or structures, shall be designed in accordance with Chapter 16 and this section.

3115.8.1 Foundations and supports. Intermodal shipping containers repurposed for use as a permanent building or structure shall be supported on foundations or other supporting structures designed and constructed in accordance with Chapters 16 through 23.

3115.8.1.1 Anchorage. Intermodal shipping containers shall be anchored to foundations or other supporting structures as necessary to provide a continuous load path for all applicable design and environmental loads in accordance with Chapter 16.

3115.8.1.2 Stacking. Intermodal shipping containers used to support stacked units shall comply with Section 3115.8.4.

3115.8.2 Welds. The strength of new welds and connections shall be no less than the strength provided by the original connections. All new welds and connections shall be designed and constructed in accordance with Chapters 16, 17 and 22.

3115.8.3 Structural design. The structural design of the intermodal shipping containers repurposed for use as a building or structure, or as part of a building or structure, shall comply with Section 3115.8.4 or 3115.8.5.

3115.8.4 Detailed structural design procedure. A structural analysis meeting the requirements of this section shall be provided to the building official to demonstrate the structural adequacy of the intermodal shipping containers.

Exception: Structures using an intermodal shipping container designed in accordance with Section 3115.8.5.

3115.8.4.1 Material properties. Structural material properties for existing intermodal shipping container steel components shall be established by Section 2202.

3115.8.4.2 Seismic design parameters. The seismic force-resisting system shall be designed and detailed in accordance with ASCE 7 and one of the following:

  1. Where all or portions of the profiled steel panel elements are considered to be the seismic force-resisting system, design and detailing shall be in accordance with AISI S100 and ASCE 7, Table 12.2-1 requirements for steel systems not specifically detailed for seismic resistance, excluding cantilevered column systems.

  2. Where all or portions of the profiled steel panel elements are not considered to be part of the seismic force-resisting system, an independent seismic force-resisting system shall be selected and detailed in accordance with ASCE 7, Table 12.2-1, or

  3. Where all or portions of the profiled steel panel elements are retained and integrated into a seismic force-resisting system other than as permitted by Section 3115.8.4.2 Item 1, seismic design parameters shall be developed from testing and analysis in accordance with Section 104.11 and ASCE 7, Section 12.2.1.1 or 12.2.1.2.

3115.8.4.3 Allowable shear value. The allowable shear values for the profiled steel panel side walls and end walls shall be in accordance with the design approach selected in Section 3115.8.4.2. Where penetrations are made in the side walls or end walls designated as part of the lateral force-resisting system, the penetrations shall be substantiated by rational analysis.

3115.8.5 Simplified structural design procedure of single-unit containers. Single-unit intermodal shipping containers conforming to the limitations of Section 3115.8.5.1 shall be permitted to be designed in accordance with Sections 3115.8.5.2 and 3115.8.5.3.

3115.8.5.1 Limitations. Use of Section 3115.8.5 is subject to all the following limitations:

  1. The intermodal shipping container shall be a single-unit, stand-alone unit supported on a foundation and shall not be in contact with or supporting any other shipping container or other structure.

  2. The intermodal shipping container's top and bottom rails, corner castings, and columns or any portion thereof shall not be notched, cut, or removed in any manner.

  3. The intermodal shipping container shall be erected in a level and horizontal position with the floor located at the bottom.

  4. The intermodal shipping container shall be located in Seismic Design Category A, B, C and D.

3115.8.5.2 Simplified structural design assumptions. Where permitted by Section 3115.8.5.1, single-unit stand-alone, intermodal shipping containers shall be designed using the following assumptions for the profiled steel panel side walls and end walls:

  1. The appropriate detailing requirements contained in Chapters 16 through 23.

  2. Response modification coefficient, R = 2,

  3. Over strength factor, Ω 0 = 2.5,

  4. Deflection amplification factor, C d = 2, and

  5. Limits on structural height, h n = 9.5 feet (2900 mm).

3115.8.5.3 Allowable shear value. The allowable shear values for the profiled steel panel side walls (longitudinal) and end walls (transverse) for wind design and seismic design using the coefficients of Section 3115.8.5.2 shall be in accordance with Table 3115.8.5.3, provided that all of the following conditions are met:

  1. The total linear length of all openings in any individual side walls or end walls shall be limited to not more than 50 percent of the length of that side walls or end walls, as shown in Figure 3115.8.5.3(1).

  2. Any full height wall length, or portion thereof, less than 4 feet (305 mm) long shall not be considered as a portion of the lateral force-resisting system, as shown in Figure 3115.8.5.3(2).

  3. All side walls or end walls used as part of the lateral force-resisting system shall have an existing or new boundary element on all sides to form a continuous load path, or paths, with adequate strength and stiffness to transfer all forces from the point of application to the final point of resistance, as shown in Figure 3115.8.5.3(3). The existing door interlocking mechanism shall not be considered as a component of the required load path.

  4. Where openings are made in container walls, floors or roofs, for doors, windows and other openings:

4.1

The opening shall be framed with steel elements that are designed in accordance with Chapters 16 and 22.

4.2

The cross section and material grade of any new steel element shall be equal to or greater than the steel element removed.

  1. A maximum of one penetration not greater than a 6-inch (152 mm) diameter hole for conduits, pipes, tubes or vents, or not greater than 16 square inches (10 322mm 2 ) for electrical boxes, is permitted for each individual 8 feet (2438 mm) length of lateral force-resisting wall. Penetrations located in walls that are not part of the wall lateral force resisting system shall not be limited in size or quantity. Existing intermodal shipping container's vents shall not be considered a penetration, as shown in Figure 3115.8.5.3(4).

  2. End wall door or doors designated as part of the lateral force-resisting system shall be intermittently welded closed around the full perimeters of the door panels.

TABLE 3115.8.5.3 ALLOWABLE SHEAR VALUES FOR INTERMODAL SHIPPING CONTAINER SIDE WALLS AND END WALLS FOR WIND OR SEISMIC LOADING

CONTAINER DESIGNATION b CONTAINER DIMENSION (Nominal Length) CONTAINER DIMENSION (Nominal Height) ALLOWABLE SHEAR VALUES (PLF) a, c ALLOWABLE SHEAR VALUES (PLF) a, c
Side Wall End Wall
1EEE 45 feet (13.7 M) 9.5 feet (2896 mm) 75 843
1EE 45 feet (13.7 M) 8.6 feet (2591 mm) 75 843
1AAA 40 feet (12.2 M) 9.5 feet (2896 mm) 84 843
1AA 40 feet (12.2 M) 8.5 feet (2592 mm) 84 843
1A 40 feet (12.2 M) 8.0 feet (2438 mm) 84 843
1AX 40 feet (12.2 M) <8.0 feet (2483 mm) 84 843
1BBB 30 feet (9.1 M) 9.5 feet (2896 mm) 112 843
1BB 30 feet (9.1 M) 8.5 feet (2591 mm) 112 843
1B 30 feet (9.1 M) 8.0 feet (2438 mm) 112 843
1BX 30 feet (9.1 M) <8.0 feet (2438 mm) 112 843
1CC 20 feet (9.1 M) 8.5 feet (2591 mm) 168 843
1C 20 feet (9.1 M) 8.0 feet (2438 mm) 168 843
1CX 20 feet (9.1 M) <8.0 feet (2438 mm) 168 843

a. The allowable strength for the side walls and end walls of the intermodal shipping containers are derived from ISO 1496-1 and reduced by a factor of safety of 5.

b. Container designation type is derived from ISO 668.

c. Limitations of Sections 3115.8.5.1 and 3115.8.5.3 shall apply.

[Figure: FIGURE 3115.8.5.3(1) Bracing Unit Distribution - Maximum Linear Length]

FIGURE 3115.8.5.3(1) Bracing Unit Distribution - Maximum Linear Length

[Figure: FIGURE 3115.8.5.3(2) Bracing Unit Distribution - Minimum Linear Length]

FIGURE 3115.8.5.3(2) Bracing Unit Distribution - Minimum Linear Length

[Figure: FIGURE 3115.8.5.3(3) Bracing Unit Distribution - Boundary Elements]

FIGURE 3115.8.5.3(3) Bracing Unit Distribution - Boundary Elements

[Figure: FIGURE 3115.8.5.3(4) Bracing Unit Distribution - Penetrating Limitations]

FIGURE 3115.8.5.3(4) Bracing Unit Distribution - Penetrating Limitations

(§ 2, Ord. 19-0015, eff. January 1, 2020; § 2, Ord. 22-0008, eff. January 1, 2023)

Editor's note— See editor's note, § 9.01.080.

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