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ORDINANCE NS - 1163 The power requirement shall be deteuamined so as to provide service to, but not limited to the following: 1. Fire alarm system. 2. Exit and other emergency lighting. 3. Fire protection equipment. 4. Mechanical ventilation required by this Section. 5. Fire Department elevator. 6. Voice communication system. (k) Seismic Considerations. In Seismic Zones 2 and 3 the anchorage of the following mechanical and electrical equipment required by the Section shall be designed in accordance with Section 2314 for a lateral force based on a "Cp" value of 0.5 unless data substantiating a lesser value is furnished: 1. Elevator drive and suspension systems. 2. Standby power and lighting facilities. 3. Fire pumps and other fire protection equipment. (1) Exits. Ail Stairway doors which are to be locked from the stairway side shall have the capability of being unlocked upon a signal from the Central Control Station. Emergency telephones available to the public shall be provided at not less than'every fifth floor in each required stairway. (m) Fire Sprinkler Alternative. Sprinkler protec- tion conforming to the following may be provided as an alternate to compartmentation: 1. The sprinkler system is hydraulically designed using the parameters set forth in U.B.C. Standard No. 38-1 and the following: (i) Shutoff valves and waterflow devices shall be provided on each floor. In addition to actuating a local alarm on the floor upon which the water flow is detected, such valves shall be supervised by a continuously manned con- trol station or by a central station. pipe with loop (ii) The sprinkler system shall be looped between stand- risers at the bottom, top and mid-height of all buildings a maximum of 20 stories served by any loop. At each level there shall be check valves. (iii) Piping may be copper or steel with no minimum size of pipe required. Solder used in connections shall contain not less than 95 percent tin and 5 percent antimony. (iv) Pitching of lines is not required. (v) A minimum of two fire pumps independently driven shall be provided and sized for the sprinkler demand and for a minimum 500 gallons per minute Fire Department standpipe operations. (vi) An on -site supply of water equal to a 20-minute demand or 15,000 gallons on a combined sprinkler and stand- pipe, whichever is the smaller, shall be provided. This supply shall be available automatically if the principal supply fails. -4-