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r�s <br />Page 2 <br />18 May 1993 <br />Mr. Warren Burns <br />BUILDING LIFE SAFETY SYSTEMS <br />Proposed System Design• Stairways <br />Each stairway will be provided with a roof mounted supply fan for each <br />stairway (present building design has two stairways). In the event of a fire <br />condition the supply fan will pressurize the stairway with outside air. Each <br />stair tower will be. provided with a barometric damper to discharge. a <br />minimum of 2,500 cubic feet per minute through the relief opening. Supply <br />air shall be delivered to the stairway via a single point of injection or via <br />multiple points of injection. The barometric damper will be located at the top <br />of the stair tower. ��.l'1 TPA 1 <br />3-v <br />�1 <br />ITEM 2: SMOKE CONTROL ' <br />Code Reauirement <br />Per the 1991 Uniform Building Code section 1807 g-2: <br />When a complete and approved automatic sprinkler system is Installed the <br />mechanical air handling equipment may be designed to accomplish smoke <br />removal. Under fire conditions, the return and exhaust air shall be moved <br />directly to the outside without recirculation to other sections of the building. <br />The air -handling system shall provide a minimum of one exhaust air change <br />each 10 minutes for the area involved. <br />Proposed System Desion• Floor by Floor Pressurization <br />The present office area Heating, Ventilation and Air Conditioning system <br />design concept is well suited to smoke control. The system consists of fuur <br />(a) air handling systems (see Sketch 1). Because each air handling system <br />will serve multiple floors damper control will be used to isolate a floor during <br />a fire condition. Floors above and below the fire floor will be supplied <br />4& <br />♦ I ♦ c v <br />'S'd siNui7nSNoo SnNGH wu90:60 CS. 01 d3S <br />