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that are smaller than the areaspecified in section 903.2.10 3 or 903.2.10.1 <br /> of the Califomia Fire Code. <br /> 2. Existing Buildings: Notwithstanding anyapolicable provisions of this code <br /> an automaticsprinkler system shall be provided in an existing building when <br /> an addition occurs and one of the followinq conditions exists: <br /> 2.1. When an addition is 33% or more of the existing building_ area, and <br /> the resultinq building area exceeds 5000 square feet. <br /> 2.2. When an addition exceeds 2000 square feet, and the resultin <br /> buildin area exceeds 5000 square feet. <br /> 2.3. An additional story is added above the second floor regardless of fire <br /> areas or allowable area. <br /> Exception: Additions to Group R-3 occupancies shall comply with Section <br /> 903.2.8. <br /> Section 903.3.5.3 Hydraulically calculated systems is hereby added as follows: <br /> 903.3.5.3 Hydraulically calculated systems. The desi n of hydraulically calculated <br /> sprinkler systems shall not exceed 90% of the water supply ca acit . <br /> Exception: When static pressure exceeds 100 psi, and when required by the <br /> fire code official the sprinkler s stem shall not exceed the water supply <br /> capacity specified by Table 903.3.5.3. <br /> TABU 903.3.5.3 <br /> Hydraulically Calculated Systems <br /> Design% <br /> 75 <br /> 40 <br /> —85 <br /> 100 110 120 130 140 150 PSI <br /> Sec. 14-22 Chapter 11 Construction Requirements for Existing Buildings-amendments <br /> Chapter 11 CONSTRUCTION REQUIREMENTS FOR EXISTING BUILDINGS is <br /> adopted in only those sections and subsections adopted by the SFM. <br /> Ordinance No. NS-3088 <br /> Page 18 of 27 <br />