Manhattan Beach Municipal Code Ch. 9.03 Residential Code

Footnotes:

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Editor's note— Ord. No. 19-0015, eff. January 1, 2020, in effect repealed ch. 9.03, §§ 9.03.010—9.03.080 and enacted new ch. 9.03 as set out herein. Former ch. 9.03 pertained to similar subject matter and derived from § 3, Ord. 16-0032, eff. January 7, 2017 and §§ 3, 4, Ord. 17-0021, eff. November 17, 2017.

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 "2022 California Residential Code," including Chapter 1, Division 2 and Appendices AJ, AK, AQ, and AX 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 set forth herein at length, are hereby established and adopted as the rules, regulations, and provisions and conditions to be observed and followed in the construction, enlargement, alteration, movement, replacement, repair, equipment, use and occupancy, location, removal and demolition, conversion, use, height, area and maintenance of buildings, structures and improvements of every detached one-and two-family dwelling, townhouse not more than three (3) stories above grade plane in height with a separate means of egress and structures accessory thereto in the City and related subjects, items and matters as set forth in said Code, within the City. Subject to the additions, deletions and amendments set forth in this chapter, said Code, with its said Chapter 1, Division 2 and Appendices AJ, AK, AQ, and AX, is hereby established and adopted by reference, and the same shall be designated, known and referred to as the "Residential Code" of and for the City.

(§ 4, Ord. 19-0015, eff. January 1, 2020; § 4, Ord. 22-0008, eff. January 1, 2023)

R105.2, Building Item 2 is amended to read as follows:

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

R105.2, Building Item 7 is amended to read as follows:

7. Prefabricated swimming pools that are less than 18 inches (457 mm) deep.

(§ 3, Ord. 19-0015, eff. January 1, 2020; § 4, Ord. 22-0008, eff. January 1, 2023)

Section R105.3.2 is amended as follows:

R105.3.2 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.

(§ 3, Ord. 19-0015, eff. January 1, 2020; § 4, Ord. 22-0008, eff. January 1, 2023)

Section R105.5 is amended to read as follows:

R105.5 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 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 two 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 extend the time for action by the permittee 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.

(§ 3, Ord. 19-0015, eff. January 1, 2020; § 4, Ord. 22-0008, eff. January 1, 2023)

Section R108.2 is amended to read as follows:

R108.2 Schedule of permit fees. The fees shall be determined by the most current City Resolution of Fees.

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 Resolution of Fees.

The plan review fees specified in this section are separate fees from the permit fees and are in addition to the permit fees.

When submittal documents are incomplete or changed so as to require additional plan review or when the project involves phased submittal items as defined in Section R106.3.3, an additional plan review fee shall be charged as determined by the most current City Resolution of Fees.

Section R108.6 is amended to read as follows:

R108.6 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 Resolution of Fees 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 Resolution of Fees. 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.

(§ 3, Ord. 19-0015, eff. January 1, 2020; § 4, Ord. 22-0008, eff. January 1, 2023)

Section R313.1 is hereby amended to read as follows:

R313.1 Townhouse automatic fire sprinkler systems.

An automatic sprinkler system shall be installed in new townhouses.

Exception: An automatic sprinkler system shall not be required in existing townhouses that do not meet the conditions described in Section R313.2.

Section R313.2 is hereby amended to read as follows:

R313.2 One- and two-family dwellings automatic sprinkler systems. An automatic sprinkler system shall be installed as set forth in this Section under the following conditions:

1. In all newly constructed one- and two-family dwellings, garages, and accessory structures.

2. Throughout any existing building whenever more than fifty percent cumulative, of the existing floor area, including mezzanines, is added to within three calendar years.

3. Throughout any existing building whenever more than a cumulative fifty percent of the walls or ceilings are exposed.

4. Throughout the existing attached garage when a remodel or addition causes an increase in square footage to the garage or when the remodel or addition causes habitable area to be added next to or above the garage.

5. In a newly constructed Accessory Dwelling Unit attached or detached, when the single family dwelling has an existing residential automatic fire sprinkler system.

Exceptions:

1. Non-habitable detached accessory structures that are 500 square feet or less, excluding garages.

2. Accessory Dwelling Unit, provided that all of the following are met:

2.1

The unit meets the definition of an Accessory Dwelling Unit as defined in the Government Code Section 65852.2.

2.2

The existing primary residence does not have automatic fire sprinklers.

2.3

The accessory detached dwelling unit does not exceed 1,200 square feet in size.

2.4

The unit is on the same lot as the primary residence.

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

Editor's note— Ord. 22-0008, § 4, effective January 1, 2023, repealed § 9.03.060 and enacted a new § 9.03.060 as set out herein. Former § 9.03.060 pertained to definitions and derived from § 3, Ord. 19-0015, eff. January 1, 2020.

Section R301.1.3.2 of the 2022 Edition of the California Residential Code is amended to read as follows:

R301.1.3.2 Woodframe structures. The building official shall require construction documents to be approved and stamped by a California licensed architect or engineer for all dwellings of woodframe construction more than two stories and basement in height located in Seismic Design Category A, B or

C. Notwithstanding other sections of law; the law establishing these provisions is found in Business and Professions Code Sections 5537 and 6737.1.

The building official shall require construction documents to be approved and stamped by a California licensed architect or engineer for all dwellings of woodframe construction more than one story in height or with a basement located in Seismic Design Category D 0 , D 1 , or D 2 .

Items 1, 3 and 5 of Section R301.2.2.6 of the 2022 Edition of the California Residential Code are amended to read as follows:

1. Shear wall or braced wall offsets out of plane. Conditions where exterior shear wall lines or braced wall panels are not in one plane vertically from the foundation to the uppermost story in which they are required.

2. Shear wall or braced wall offsets in plane. Conditions where the end of a braced wall panel occurs over an opening in the wall below.

3. Floor level offset. Conditions where portions of a floor level are vertically offset.

Section R301.2.2.11 is added to Chapter 3 of the 2022 Edition of the California Residential Code to read as follows:

R301.2.2.11 Anchorage of mechanical, electrical, or plumbing components and equipment. Mechanical, electrical, or plumbing components and equipment shall be anchored to the structure. Anchorage of the components and equipment shall be designed to resist loads in accordance with the California Building Code and ASCE 7, except where the component is positively attached to the structure and flexible connections are provided between the component and associated ductwork, piping, and conduit; and either

1. The component weighs 300 lb (1,780 N) or less and has a center of mass located 4 ft (1.22 m) or less above the supporting structure; or

2. The component weighs 20 lb (89N) or less or, in the case of a distributed system, 5 lb/ft (73 N/m) or less.

Section R401.1 of the 2022 Edition of the California Residential Code is amended to read as follows:

R401.1 Application. The provisions of this chapter shall control the design and construction of the foundation and foundation spaces for buildings. In addition to the provisions of this chapter, the design and construction of foundations in flood hazard areas as established by Table R301.2 shall meet the provisions of Section R322. Wood foundations shall be designed and installed in accordance with AWC PWF.

Exception: The provisions of this chapter shall be permitted to be used for wood foundations only in the following situations:

1. In buildings that have no more than two floors and a roof.

2. When interior basement and foundation walls are constructed at intervals not exceeding 50 feet (15 240 mm).

Wood foundations in Seismic Design Category D 0 , D 1 , or D 2 shall not be permitted.

Exception: In non-occupied, single-story, detached storage sheds and similar uses other than carport or garage, provided the gross floor area does not exceed 200 square feet, the plate height does not exceed 12 feet in height above the grade plane at any point, and the maximum roof projection does not exceed 24 inches.

Sections R403.1.2, R403.1.3.6 and R403.1.5 of the 2022 Edition of the California Residential Code are amended to read as follows:

R403.1.2 Continuous footing in Seismic Design Categories D0, D1, or D2. Exterior walls of buildings located in Seismic Design Categories D 0 , D 1 , or D 2 shall be supported by continuous solid or fully grouted masonry or concrete footings. Required interior braced wall panels in buildings located in Seismic Design Categories D 0 , D 1 , or D 2 shall be supported on continuous foundations.

R403.1.3.6 Isolated concrete footings. In detached one- and two-family dwellings located in Seismic Design Category A, B, or C, that are three stories or less in height, and constructed with stud bearing walls, isolated plain concrete footings supporting columns or pedestals are permitted.

R403.1.5 Slope. The top surface of footings shall be level. The bottom surface of footings shall not have a slope 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 footings or where the slope of the bottom surface of the footings will exceed one unit vertical in 10 units horizontal (10-percent slope).

For structures assigned to Seismic Design Categories D 0 , D 1 , or D 2 , stepped footings shall be reinforced with four No. 4 rebar. Two bars shall be place at the top and bottom of the footings as shown in Figure R403.1.5.

[Figure: FIGURE R403.1.5 STEPPED FOOTING]

FIGURE R403.1.5 STEPPED FOOTING

Section R404.2 of the 2022 Edition of the California Residential Code is amended to read as follows:

R404.2 Wood foundation walls. Wood foundation walls shall be constructed in accordance with the provisions of Sections R404.2.1 through R404.2.6 and with the details shown in Figures R403.1(2) and R403.1(3). Wood foundation walls shall not be used for structures located in Seismic Design Category D 0 , D 1 , or D 2 .

Section R501.2 of the 2022 Edition of the California Residential Code is amended to read as follows:

R501.2 Requirements. Floor construction shall be capable of accommodating all loads in accordance with Section R301 and of transmitting the resulting loads to the supporting structural elements. Mechanical or plumbing fixtures and equipment shall be attached or anchored to the structure in accordance with Section R301.2.2.11.

Section R503.2.4 is added to Chapter 5 of the 2022 Edition of the California Residential Code to read as follows:

R503.2.4 Openings in horizontal diaphragms. Openings in horizontal diaphragms with a dimension perpendicular to the joist that is greater than 4 feet (1.2 m) shall be constructed in accordance with Figure R503.2.4.

[Figure]

a. Blockings shall be provided beyond headers.

b. Metal ties not less than 0.058 inch [1.47 mm (16 galvanized gage)] by 1.5 inches (38 mm) wide with eight 16d common nails on each side of the header-joist intersection. The metal ties shall have a minimum yield of 33,000 psi (227 MPa).

c. Openings in diaphragms shall be further limited in accordance with Section R301.2.2.6.

FIGURE R503.2.4 OPENINGS IN HORIZONTAL DIAPHRAGMS

Lines 20, 21, 24, and 34—37 of Table R602.3(1) of the 2022 Edition of the California Residential Code are amended to read as follows:

TABLE R602.3(1)—continued FASTENING SCHEDULE

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s; 1 ksi = 6.895 MPa.

a Nails are smooth-common, box or deformed shanks except where otherwise stated. Nails used for framing and sheathing connections shall have minimum average bending yield strengths as shown: 80 ksi for shank diameter of 0.192 inch (20d common nail), 90 ksi for shank diameters larger than 0.142 inch but not larger than 0.177 inch, and 100 ksi for shank diameters of 0.142 inch or less.

b RSRS-01 is a Roof Sheathing Ring Shank nail meeting the specifications in ASTM F1667.

c Nails shall be spaced at not more than 6 inches on center at all supports where spans are 48 inches or greater.

d Four-foot by 8-foot or 4-foot by 9-foot panels shall be applied vertically.

e Spacing of fasteners not included in this table shall be based on Table R602.3(2).

f For wood structural panel roof sheathing attached to gable end roof framing and to intermediate supports within 48 inches of roof edges and ridges, nails shall be spaced at 6 inches on center where the ultimate design wind speed is less than 130 mph and shall be spaced 4 inches on center where the ultimate design wind speed is 130 mph or greater but less than 140 mph.

g Gypsum sheathing shall conform to ASTM C 1396 and shall be installed in accordance with GA 253. Fiberboard sheathing shall conform to ASTM C 208.

h Spacing of fasteners on floor sheathing panel edges applies to panel edges supported by framing members and required blocking and at floor perimeters only. Spacing of fasteners on roof sheathing panel edges applies to panel edges supported by framing members and required blocking. Blocking of roof or floor sheathing panel edges perpendicular to the framing members need not be provided except as required by other provisions of this code. Floor perimeter shall be supported by framing members or solid blocking.

i Where a rafter is fastened to an adjacent parallel ceiling joist in accordance with this schedule, provide two toe nails on one side of the rafter and toe nails from the ceiling joist to top plate in accordance with this schedule. The toe nail on the opposite side of the rafter shall not be required.

j RSRS-01 is a Roof Sheathing Ring Shank nail meeting the specifications in ASTM F1667.

k Use of staples in roof, floor, and braced wall panels shall be prohibited in Seismic Design Category D 0 , D 1 , or D 2 .

Footnote "b" of Table R602.3(2) of the Edition of the California Residential Code is amended to read as follows: b. Staples shall have a minimum crown width of 7/16-inch on diameter except as noted. Use of staples in roof, floor, subfloor, and braced wall panels shall be prohibited in Seismic Design Category D 0 , D 1 , or D 2 .

Exception of Section R602.3.2 and Table R602.3.2 of the 2022 Edition of the California Residential Code is amended to read as follows:

Exception: In other than Seismic Design Category D 0 , D 1 , or D 2 , a single top plate used as an alternative to a double top plate shall comply with the following:

1. The single top plate shall be tied at corners, intersecting walls, and at in-line splices in straight wall lines in accordance with Table R602.3.2.

2. The rafters or joists shall be centered over the studs with a tolerance of not more than 1 inch (25 mm).

3. Omission of the top plate is permitted over headers where the headers are adequately tied to adjacent wall sections in accordance with Table R602.3.2.

Table R602.3.2 is amended to read as follows:

TABLE R602.3.2 SINGLE TOP-PLATE SPLICE CONNECTION DETAILS

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

Section R602.10.2.3 of the 2022 Edition of the California Residential Code is amended to read as follows:

R602.10.2.3 Minimum number of braced wall panels. Braced wall lines with a length of 16 feet (4877 mm) or less shall have not less than two braced wall panels of any length or one braced wall panel equal to 48 inches (1219 mm) or more. Braced wall lines greater than 16 feet (4877 mm) shall have not less than two braced wall panels. In Seismic Design Category D 0 , D 1 , or D 2 , no braced wall panel shall have a contributing length less than 48 inches in length or as required in Section R602.10.3, whichever is greater.

Table R602.10.3(3) of the 2022 Edition of the California Residential Code is amended to read as follows:

TABLE R602.10.3(3) BRACING REQUIREMENTS BASED ON SEISMIC DESIGN CATEGORY

Continued

"For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa., NP = Not Permitted."

a selectout="html" Linear interpolation shall be permitted.

b Interpolation of bracing length between the S ds values associated with the seismic design categories shall be permitted when a site-specific S ds value is determined in accordance with Section 1613.2 of the California Building Code.

c selectout="html" Where the braced wall line length is greater than 50 feet, braced wall lines shall be permitted to be divided into shorter segments having lengths of 50 feet or less, and the amount of bracing within each segment shall be in accordance with this table.

d Method LIB shall have gypsum board fastened to not less than one side with nails or screws in accordance with Table R602.3(1) for exterior sheathing or Table R702.3.5 for interior gypsum board. Spacing of fasteners at panel edges shall not exceed 8 inches.

e selectout="html" Methods PFG and CS-SFB do not apply in Seismic Design Categories D 0 , D 1 and D 2 .

f selectout="html" Methods PFH, PFG and ABW are only permitted on a single story or a first of two stories.

g selectout="html" Where more than one bracing method is used, mixing methods shall be in accordance with Section R602.10.4.1.

h selectout="html" One- and two- family dwellings in Seismic Design Category D2 exceeding two stories shall be designed in accordance with accepted engineering practice.

i selectout="html" Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC D 0 , D 1 or D 2 . Methods DWB, SFB, PBS, HPS, and CS-SFB are not permitted in D 0 , D 1 or D 2 .

Table R602.10.4 of the 2022 Edition of the California Residential Code is amended to read as follows:

TABLE R602.10.4 BRACING METHODS

Continued

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 degree = 0.0175 rad, 1 pound per square foot = 47.8 N/m 2 , 1 mile per hour = 0.447 m/s.

a selectout="html" Adhesive attachment of wall sheathing, including Method GB, shall not be permitted in Seismic Design Categories C, D 0 , D 1 and D 2 .

b selectout="html" Applies to panels next to garage door opening where supporting gable end wall or roof load only. Shall only be used on one wall of the garage. In Seismic Design Categories D 0 , D 1 and D 2 , roof covering dead load shall not exceed 3 psf.

c selectout="html" Garage openings adjacent to a Method CS-G panel shall be provided with a header in accordance with Table R602.7(1). A full-height clear opening shall not be permitted adjacent to a Method CS-G panel.

d selectout="html" Method CS-SFB does not apply in Seismic Design Categories D 0 , D 1 and D 2 .

e selectout="html" Method applies to detached one- and two-family dwellings in Seismic Design Categories D 0 through D 2 only.

f selectout="html" Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1 in SDC D 0 , D 1 , or D 2 . Methods LIB, DWB, SFB, PBS, HPS, and PFG are not permitted in SDC D 0 , D 1 , or D 2 .

g selectout="html" Use of staples in braced wall panels shall be prohibited in SDC D 0 , D 1 , or D 2 .

Table R602.10.5 of the 2022 Edition of the California Residential Code is amended to read as follows:

TABLE R602.10.5 MINIMUM LENGTH OF BRACED WALL PANELS

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s. NP = Not Permitted.

a Linear interpolation shall be permitted.

b Use the actual length where it is greater than or equal to the minimum length.

c Maximum header height for PFH is 10 feet in accordance with Figure R602.10.6.2, but wall height shall be permitted to be increased to 12 feet with pony wall.

d Maximum header height for PFG is 10 feet in accordance with Figure R602.10.6.3, but wall height shall be permitted to be increased to 12 feet with pony wall.

e Maximum header height for CS-PF is 10 feet in accordance with Figure R602.10.6.4, but wall height shall be permitted to be increased to 12 feet with pony wall.

Figure R602.10.6.1 of the 2022 Edition of the California Residential Code is amended to read as follows:

[Figure: FIGURE R602.10.6.1 METHOD ABW—ALTERNATE BRACED WALL PANEL]

FIGURE R602.10.6.1 METHOD ABW—ALTERNATE BRACED WALL PANEL

Figure R602.10.6.2 of the 2022 Edition of the California Residential Code is amended to read as follows:

[Figure: FIGURE R602.10.6.2 METHOD PFH—PORTAL FRAME WITH HOLD-DOWNS AT DETACHED GARAGE DOOR OPENINGS]

FIGURE R602.10.6.2 METHOD PFH—PORTAL FRAME WITH HOLD-DOWNS AT DETACHED GARAGE DOOR OPENINGS

Figure R602.10.6.4 of the 2022 Edition of the California Residential Code is amended to read as follows:

[Figure: FIGURE R602.10.6.4 METHOD CS-PF—CONTINUOUSLY SHEATHED PORTAL FRAME PANEL CONSTRUCTION]

FIGURE R602.10.6.4 METHOD CS-PF—CONTINUOUSLY SHEATHED PORTAL FRAME PANEL CONSTRUCTION

Section R606.4.4 of the 2022 Edition of the California Residential Code is amended to read as follows:

R606.4.4 Parapet walls. Unreinforced solid masonry parapet walls shall not be less than 8 inches (203 mm) thick and their height shall not exceed four times their thickness. Unreinforced hollow unit masonry parapet walls shall be not less than 8 inches (203 mm) thick, and their height shall not exceed three times their thickness. Masonry parapet walls in areas subject to wind loads of 30 pounds per square foot (1.44 kPa) or located in Seismic Design Category D 0 , D 1 , or D 2 , or on townhouses in Seismic Design Category C shall be reinforced in accordance with Section R606.12.

Section R606.12.2.2.3 of the 2022 Edition of the California Residential Code is amended to read as follows:

R606.12.2.2.3 Reinforcement requirements for masonry elements. Masonry elements listed in Section R606.12.2.2.2 shall be reinforced in either the horizontal or vertical direction as shown in Figure R606.11(2) and in accordance with the following:

1. Horizontal reinforcement. Horizontal joint reinforcement shall consist of not less than one No. 4 bar spaced not more than 48 inches (1219 mm). Horizontal reinforcement shall be provided within 16 inches (406 mm) of the top and bottom of these masonry elements.

2. Vertical reinforcement. Vertical reinforcement shall consist of not less than one No. 4 bar spaced not more than 48 inches (1219 mm). Vertical reinforcement shall be within 8 inches (203 mm) of the ends of masonry walls.

Section R803.2.4 is added to Chapter 8 of the 2022 Edition of the California Residential Code to read as follows:

R803.2.4 Openings in horizontal diaphragms. Openings in horizontal diaphragms shall conform with Section R503.2.4.

Section R1001.3.1 of the 2022 Edition of the California Residential Code is amended to read as follows:

R1001.3.1 Vertical reinforcing. For chimneys up to 40 inches (1016 mm) wide, four No. 4 continuous vertical bars adequately anchored into the concrete foundation shall be placed between wythes of solid masonry or within the cells of hollow unit masonry and grouted in accordance with Section R606. Grout shall be prevented from bonding with the flue liner so that the flue liner is free to move with thermal expansion. For chimneys more than 40 inches (1016 mm) wide, two additional No. 4 vertical bars adequately anchored into the concrete foundation shall be provided for each additional flue incorporated into the chimney or for each additional 40 inches (1016 mm) in width or fraction thereof.

(§ 4, Ord. 19-0015, eff. January 1, 2020; § 4, Ord. 22-0008, eff. January 1, 2023)