Article III — CALIFORNIA RESIDENTIAL CODE

SEC. 14-4. CALIFORNIA RESIDENTIAL CODE ADOPTED.

Part 2.5 of twelve parts of the California Code of Regulations, Title 24, known as the California Residential Code ("CRC"), 2025 Edition, including Appendix BF and BB, as published by the Building Standards Commission, 2525 Natomas Park Drive, Suite 130, Sacramento CA 95833-2936, is hereby adopted by reference, subject to the amendments, additions, and deletions hereinafter set forth. One true copy of this code is on file in the office of the City Clerk and is available for public inspection as required by law.

(Ord. No. 3021, 3070)

SEC. 14-5. AMENDMENTS TO THE CRC.

(A) (A) Chapter One - Division II ADMINISTRATION. Except for Sections R101.1, R101.2, and R101.3, entitled "Title," "Scope," and "Purpose," Chapter One, entitled "Division II Scope and Administration" is hereby deleted from the CRC. The Administrative Code as adopted in the Oxnard City Code, Chapter 14, Article II, shall apply to this Article.

(B) Section R301.2.2.11: Add Section R301.2.2.11 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 ASCE7, 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 400 lb. or less and has a center of mass located 4 ft. or less above the supporting structure; or

  2. The component weighs 20 lb. or less or, in the case of a distributed system, 5 lb/ft or less.

(C) Section R309: Add Section R309 to read as follows:

R309. General. Approved automatic fire extinguishing systems shall be installed and maintained in accordance with Chapter 14 of the Oxnard City Code, Article XVI.

(D) Section R401.1: Amend the Exception to Section R401.1 to read as follows:

Exception: Wood foundations in Seismic Design Categories D0, D1, and D2 shall not be permitted. The provisions of this chapter shall be permitted to be used for

wood foundations only in the following situations:

  1.  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.

(E) Section R403.1.2: Amend Section R403.1.2 to read as follows:

R403.1.2. Continuous footing in Seismic Design Categories D0, D1, and D2. The braced wall panels at exterior walls of buildings located in Seismic Design Categories D0, D1, and D2 shall be supported by continuous footings. All required interior braced wall panels in buildings shall be supported by continuous footings.

(F) Section R403.1.3.6: Section R403.1.3.6 is deleted in its entirety.

(G) Section R404.2: Amend Section R404.2 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 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 D0, D1, and D2.

(H) Table R602.3(1): Amend Table R602.3(1) by adding footnote "j" to be applicable to the entire table and to read as follows:

   j. Use of staples in braced wall panels shall be prohibited in Seismic Design Category D0, D1, and D2.

(I) Table R602.3(2): Amend Table R602.3(2) by revising footnote "b" to read as follows:

b.  Staples shall have a minimum crown width of 7/16-inch diameter except as noted. Use of staples in roof, floor, subfloor, and braced wall panels shall be

prohibited in Seismic Design Category D0, D1, and D2.

(J) Table R602.10.3(3): Amend Table R602.10.3(3) to read as follows:

TABLE R602.10.3(3)

BRACING REQUIREMENTS BASED ON SEISMIC DESIGN CATEGORY

                   SOIL CLASS Da

             WALL HEIGHT = 10 FT                                     MINIMUM TOTAL LENGTH (feet) OF

               10 PSF FLOOR DEAD LOAD                               BRACED WALL PANELS REQUIRED

            15 PSF ROOF/CEILING DEAD LOAD                            ALONG EACH BRACED WALL LINE b
                 BRACED W

                                          Braced Wall Line    Method LIB, DWB,     Methodsc GB       Method         Continuous

Seismic Design Story Location Length SFB, PBS, and HPS and PCP WSPd Sheathing d Category (SDC)

                   SOIL CLASS Da

             WALL HEIGHT = 10 FT                                     MINIMUM TOTAL LENGTH (feet) OF

               10 PSF FLOOR DEAD LOAD                               BRACED WALL PANELS REQUIRED

            15 PSF ROOF/CEILING DEAD LOAD                            ALONG EACH BRACED WALL LINE b
                 BRACED W

                                          Braced Wall Line    Method LIB, DWB,     Methodsc GB       Method         Continuous

Seismic Design Story Location Length SFB, PBS, and HPS and PCP WSPd Sheathing d Category (SDC)

10 NP 8.0 2.5 2.1 20 NP 16.0 5.0 4.3 30 NP 24.0 7.5 6.4 40 NP 32.0 10.0 8.5 50 NP 40.0 12.5 10.6 10 NP NP 5.5 4.7 SCD D2 20 NP NP 11.0 9.4 30 NP NP 16.5 14.0 40 NP NP 22.0 18.7 50 NP NP 27.5 23.5

a. Wall bracing lengths are based on a soil site class "D." Interpolation of bracing length between the Sd., values associated with the seismic design categories shall be permitted when a site-specific Sds value is determined in accordance with Section 16 b. Foundation cripple wall panels shall be braced in accordance with Section R602.10.9 c. Methods GB and PCP braced wall panel h/w ratio shall not exceed 1:1. d. Wood Structural Panel shall have a minimum thickness in SDC D2 of 15/32", and shall not be attached using staples.

(K) Table R602.10.4: Amend Table R602.10.4 by adding footnote “f” to be applicable to the entire table and to read as follows:

  f. Use of staples in braced wall panels shall be prohibited in Seismic Design Category D0, D1, and D2.

(L) Section R703.1: Amend Section R703.1 to read as follows:

R703.1. General. Exterior walls shall provide the building with a weather-resistant exterior wall envelope. The exterior wall envelope shall include flashing as described in Section R703.4. Additionally, balconies, landings, exterior stairways, occupied roofs and similar surfaces exposed to the weather and sealed underneath shall be waterproofed and sloped a minimum 1/4 unit vertical in 12 units horizontal (2% slope) for drainage. The weather-exposed areas with ceilings or horizontal projections not required to be sealed for fire resistive construction shall be provided with ventilation devices so as to provide adequate air movement to dry out any moisture infiltrating within the horizontal areas. Details and notes on ventilation devices shall be provided in the submittal drawings.

(M) Section R902.1: Amend the first paragraph of Section R902.1 to read as follows:

R902.1. Roofing covering materials. Roofs shall be covered with materials as set forth in Sections R904 and R905. A minimum Class A or B roofing shall be installed in areas designated by this section or where the edge of the roof is less than 3 feet from a lot line. Class A or B roofing required by this section shall be tested in accordance with UL 790 or ASTM E108.

(N) Section R902.1.2: Amend Section R902.1.3 to read as follows:

R902.1.3. Roof coverings in all other areas. All reroofing shall be constructed with Class A or B roofing and shall conform to the applicable provisions of this Chapter, or as approved by the building official.

(O) Appendix Chapter BF, Section BF103.2: Amend Appendix Chapter BF, Section BF103.2 to read as follows:

BF 103.2. Light, ventilation and emergency egress. Exterior openings required for light and ventilation shall be permitted to open into a patio structure conforming to Section BF101. Where such exterior openings serve as an exit from the dwelling unit, the patio structure, unless unenclosed, shall be provided with exits conforming to the provisions of Section R311 of this code. Emergency egress or rescue openings from sleeping rooms shall not open into a patio structure.

(P) Appendix Chapter BF, Section BF106: Appendix Chapter BF, Section BFl06 is deleted in its entirety.

(Q) Section R301.1.5: Add Section R301.1.5 to read as follows

R301.1.5 Minimum Foundation Elevation. The minimum foundation elevation for all structures governed by this code shall comply with Section 14-3 (V) of the Oxnard City Code.

(Ord. No. 3021, 3070)