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a) The 2013 California Building Code, Part 2, Volumes 1 and 2, a portion of the California Building Standards Code, Title 24 of the California Code of Regulations, as defined in the California State Health and Safety Code Section 18901 et seq., (hereinafter referred to as the "Building Code"), including Appendix G-Flood-Resistant Construction, Appendix H-Signs, Appendix I-Patio Covers, and Appendix J-Grading and any rules and regulations promulgated pursuant thereto are hereby adopted and incorporated by reference herein. b) One copy of the Building Code shall be kept on file at the City of Los Altos Hills. 8-1.1.02 Amended sections of adopted codes. Notwithstanding the provisions of Section 8-1.1.01, the Building Code is amended as follows: A. Section 1505.1.3 is amended to read as follows: 1505.1.3 Roof coverings within all other areas. The entire roof covering of every existing structure where more than 50 percent 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 the alteration, repair or replacement of the roof of every existing structure, shall be a fire-retardant roof covering that is at least Class A. B. Sections 3405.6, 3405.6.1, 3405.6.2 and 3405.6.3 are added to read as follows: 3405.6 Seismic Evaluation and Design Procedures for Repairs. The seismic evaluation and design shall be based on the procedures specified in the California Building Code, ASCE 31 Seismic Evaluation of Existing Buildings (for evaluation only) or ASCE 41 Seismic Rehabilitation of Existing Buildings. The procedures contained in Chapter A of the 2012 International Existing Building Code shall be permitted to be used as specified in Section 3403.5.1.1.3 3405.6.1 Compliance with CBC level seismic forces. Where compliance with the seismic design provisions of the California Building Code is required, the procedures shall be in accordance with one of the following: (1) One-hundred percent of the values in the California Building Code. Where the existing seismic force-resisting system is a type that can be designated as "Ordinary," the values of R, S2o, and Cd used for analysis in accordance with Chapter 16 of the California Building Code shall be those specified for structural.systems classified as "Ordinary"in accordance with Table 12.2-1 of ASCE 7, unless it is demonstrated that the structural system will provide performance equivalent to that of a "Detailed," "Intermediate" or "Special" system. (2) Compliance with ASCE 41 using both BSE-1 and BSE-2 earthquake hazard levels and the corresponding performance levels in Table 3405.6.1. Ordinance 558 Page 5