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L A TFP620 Page 4 of 8 Where the area of Glazing is less than 14.2 linear meters, all window sprin- When acceptable to the Authority Having Jurisdiction the Model WS Specific Application klers on one side shall be calculated. Window Sprinklers may be used in either a sprinklered or unsprinklered building to protect If an area reduction for quick response nonoperable window openings that are in an interior fire separation,the window sprinklers sprinklers is utilized,the linear length of are installed on both sides of the window in the fire separation. the calculated window sprinklers may be reduced,but in no case shall be less than 36 linear feet(1.2 x q900). If a single fire can be expected to INSIDE operate Model WS Window'Sprinklers and sprinklers within the design area of a hydraulically calculated system, the water demand of the window sprinklers INSIDE shall be added to the water demand of the hydraulic calculations and shall be balanced to the calculated area demand. FIGURE 3A-1-INTERIOR FIRE SEPARATION If the window sprinklers are located in an area other than the hydraulic design area,the demand of the window sprin- When acceptable to the Authority Having Jurisdiction the Model WS Specific Application klers is not required to be added to the Window Sprinklers may be used in either a sprinklered or unsprinklered building to protect demand of the remote hydraulic design nonoperable window openings that are part of a fire separation provided in jurisdictions area.However,it is necessary to prove where exterior spatial separation is defined as protecting an adjacent building from.a fire hydraulically the simultaneous opera- in your building,window sprinklers are installed on the interior side of the glass. tion of the Model WS Window Sprin- klers and the ceiling sprinklers adjacent to the.window sprinklers. OUTSIDE Interior Protection Non-Sprinklered Building Calculate all sprinklers on the most demanding side of the glazing assem- INSIDE bly within the enclosure. EXPOSURE Exterior Exposure Protection SIDE Calculate all sprinklers controlled by the deluge valve using the design FIGURE 3A-2-EXTERIOR FIRE SEPARATION-SPRINKLERS INSIDE requirements of NFPA. Duration of Water Supply When acceptable to the Authority Having Jurisdiction the Model WS Specific Application Duration of water supply must comply Window Sprinklers may be used in either a sprinklered'or unsprinklered building to protect with requirements of NFPA. If window nonoperable window openings that are part of a fire separation provided in jurisdictions sprinklers are used to provide the where exterior spatial separation is defined as protecting your building from a fire in an equivalency of a fire rating, the water adjacent building,open window sprinklers are installed on the exterior side of the glass. supply must be capable of supplying water for the required rating period. Minimum Flow per Sprinkler INSIDE 20 GPM (75,7 LPM) for sprinkler spacing of 6 to 8 ft. (1,83 to 2,44 m) or 15 GPM (56,8 LPM) for sprinkler spacing less than 6 ft. (1,83 m). OUTSIDE Maximum Pressure per Sprinkler • Horizontal Sidewall:70 psi(4,83 bar)* EXPOSURE 'The 70 psi is only for cold solder SIDE purposes. If there is a baffle or a FIGURE 3A-3-EXTERIOR FIRE SEPARATION-SPRINKLERS OUTSIDE mullion of sufficient depth to act as a baffle,separating the sprinklers, FIGURE 3A (A-1 TO A-3) the maximum pressure is 175 psi TYPICAL NON-OPERABLE WINDOW OPENINGS (12,07 bar). _ . - • Vertical Sidewall: 175 psi(12,07 bar)