The following provisions shall constitute local amendments to the cross-referenced provisions of the California Building Code (CBC), California Residential Code (CRC), and California Green Building Standards Code (CGBSC) and shall be deemed to replace the cross-referenced section of the respective code with the respective provisions set forth in this chapter.
(A) CBC Section 1505, Fire Classification, is hereby amended as follows:
§ 1505.1, 1505.1.3 and Table 1505.1 are deleted:
Sections 1505.1 through 1505.3 are amended to read as follows: The entire roof covering of every existing structure where more than 25% of the total roof area is replaced within any one year period; the entire roof covering of every new structure and any roof covering applied in any alteration, repair or replacement of the roof of every existing structure shall be a fire retardant roof covering that is at least Class B fire rating. No wood shakes or wood shingles, treated or untreated shall be permitted.
EXCEPTION: Repairs and additions to existing wood roofs, under twenty-five (25%) percent of the total existing roof area, shall be allowed to match the existing wood roof if the new materials are fire retardant and meet the specifications of a Class B roof. Only one such repair shall be allowed within a 12-month period.
(B) CBC Section 1510, Re-roofing, is hereby amended as to read as follows:
Section 1510.1 General. All re-roofing shall conform to the applicable provisions of Chapter 15 of the CBC and as otherwise required in this section. Repairs to existing roofs shall be limited to 25% of the total roof area within any one-year period. Repairs exceeding 25% of the total roof area shall be considered complete re-roofs and subject to the provisions of this code.
All re-roofing work which requires complete removal of existing roof coverings shall be considered as new work, and shall be reviewed and inspected under Chapter 15 of this code.
Sheathing placed on top of existing spaced sheathing to create a flat surface shall be installed per the roofing manufacturer’s specifications and applicable ICC reports.
Sheathing placed directly over roof rafters shall meet span and index ratings in accordance with Table 2304.7.(3) of the CBC. Sheathing shall be a minimum of one half inch in thickness and its edges shall bear on a roof rafter or similar support. Sheathing shall be fastened with minimum 8d common nails spaced six inches on center on the edge and 12 inches on center in the field.
Lightweight roofs not exceeding six pounds per square foot, which are replaced with heavier roofs, shall comply with the provision of Chapter 16 of the CBC and subject to plan check. Sheathing over existing space sheathing shall be a minimum of 3/8 inches in thickness.
Section 1510.3.3. Reroofing Overlays Allowed
Not more than one overlay of composition shingles shall be allowed.
(C) CBC Section 808, Acoustical Ceiling Systems, is hereby amended to add Section 808.1.1.3 to read as follows:
Section 808.1.1.3 Where ceiling is not supporting interior partitions, ceiling bracing shall be provided by four No. 12 gauge wires secured to the main runner within 2" of the cross runner intersection and splayed 90° from each other at an angle not exceeding 45° from the plane of the ceiling. A strut (adequate to resist the vertical component from lateral loads) fastened to the main runner shall be extended to and fastened to the structural members of the roof or floor above. These horizontal restraint points shall be placed at no more than 12'-0" on center in both directions with the first point within 6'-0" of an adjacent wall. Attachment of restraint wires to the structure above shall be adequate for the load imposed. Alternate design in accordance to ASCE-7 by a state licensed Engineer or Architect may be accepted.
(D) CBC Section 1809.4, Depth and Width of Footings, is hereby amended to add Section 1809.4.1 to read as follows:
Section 1809.4.1 Foundations in Expansive Soil. When buildings are located on expansive soil having an expansion index greater than 20 ASTMD 4829, gutters, downspouts, piping, and/or other non-erosive devices shall be provided to collect and convey rainwater to a street, storm drain, or other approved watercourses or disposal area.
Foundations in expansive soil shall be designed to comply with the following table:
Number of Floors Supported by Foundation | Thickness of Foundation Wall (Inches) | Width of Footing Inches) | Thickness of Footing (Inches) | Depth of Footing (Inches) | |
Concrete | Masonry | ||||
1 | 6 | 6 | 12 | 6 | 24 |
EXCEPTION: for residential monolithically places concrete foundation located in non-hillside terrain, two #4 reinforcing bars shall be placed within 3 inches of the of footing and two reinforcing bars shall be placed 3 to 5 inches from the bottom of the footing. Concrete floor reinforcement shall consist of number 3 reinforcement bars at 24 inches on center each way. Number 3 bars shall be embedded into footing a depth of 18 inches.
Minimum slab reinforcement for any building shall be #3 bars at 18-in on center each way.
(E) CBC Section 3109.1 is hereby amended to add Section 3109.1.1 and 3109.1.2 to read as follows:
Section 3109.1.1 DEFINITION.
BARRIER HEIGHT. The distance measured from finish grade to the top of the barrier. The face of the barrier used shall be the face that is outside the pool or spa area. Finish grade shall be the lowest adjacent grade within two (2) feet of the outer surface of the barrier along the entire length.
BARRIER HEIGHT AND CLEARANCES. The top of the barrier shall be at least 60 inches above grade measured on the side of the barrier that faces away from the swimming pool. The maximum vertical clearances between grade and the bottom of the barrier shall be 2 inches measured on the side of the barrier that faces away from the swimming pool. Where the top of the pool structure is above grade, the barrier is authorized to be at ground level or mounted on the top of the pool structure, and the maximum vertical clearance between the top of the pool structure and the bottom of the barrier shall be 4 inches.
EXCEPTION: Upon showing of good cause and in individual cases, the Building Official may allow modifications to the barrier requirements.
WIDELY SPACED HORIZONTAL MEMBERS. Barriers shall not have a design configuration that provides a ladder-like effect. When the barrier has horizontal members spaced less than 45 inches apart, such member shall be placed on the poolside of the barrier. Any decorative design work attached to the outer side of the barrier that forms a ladder like design work effect is prohibited.
CBC SECTION 3109.1.2 BARRIER HEIGHT AND CLEARANCES.
The top of the barrier shall be at least 60 inches above grade measured on the side of the barrier that faces away from the swimming pool. The maximum vertical clearances between grade and the bottom of the barrier shall be 2 inches measured on the side of the barrier that faces away from the swimming pool. Where the top of the pool structure is above grade, the barrier is authorized to be at ground level or mounted on the top of the pool structure, and the maximum vertical clearance between the top of the pool structure and the bottom of the barrier shall be 4 inches.
EXCEPTION: Upon showing of good cause and in individual cases, the Building Official may allow modifications to the barrier requirements.
(F) CRC Section R105.2 is hereby amended to add Section R105.2.1 to read as follows:
Section R105.2.1. Accessory Storage Sheds on Residential Properties. Notwithstanding any other provisions of this section, storage sheds exempt from permits by this chapter shall be separated from each other and other structures by six (6) feet. The separation distance shall be measured from exterior finish of the buildings. Eaves and overhangs from said shed shall not extend more than twelve (12) inches, measured horizontally from a vertical plane, beyond the exterior finish. The maximum height of storage sheds shall not exceed one (1) story and ten (10) feet to any part of the shed measured from existing finished grade.
(G) CRC Section R403.1.4., General, is hereby amended to add Section R403.1.4.1 to read as follows:
Section R403.1.4.4 Foundations in Expansive Soil. When buildings are located on expansive soil having an expansion index greater than 20 ASTM D 4829, gutters, downspouts, piping, and/or other non-erosive devices shall be provided to collect and convey rainwater to a street, storm drain, or other approved watercourses or disposal area.
Foundations in expansive soil shall be designed to comply with the following Table:
Number of Floors Supported by Foundation | Thickness of Foundation Wall (Inches) | Width of Footing (Inches) | Thickness of Footing (Inches) | Depth of Footing (Inches) | |
Concrete | Masonry | ||||
1 | 6 | 6 | 12 | 6 | 24 |
Exception: for residential monolithically places concrete foundation located in non-hillside terrain, two #4 reinforcing bars shall be placed within 3 inches of the of footing and two reinforcing bars shall be placed 3 to 5 inches from the bottom of the footing. Concrete floor reinforcement shall consist of number 3 reinforcement bars at 24 inches on center each way. Number 3 bars shall be embedded into footing a depth of 18 inches.
Minimum slab reinforcement for any building shall be #3 bars at 18-in on center each way.
(Ord. 1308, passed 12-19-07; Am. Ord. 1338, passed 11-17-10; Am. Ord. 1361, passed 12-18-13; Am. Ord. 1396, passed 2-1-17; Am. Ord. 1441, passed 11-6-19)