SPECIFIC APPLICATION
WINDOW SPRINKLERS
(K5.6)
TECHNICAL DATA
Form No. F_042519 21.09.28 Rev 21.3
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Page 7 of 10
The Viking Corporation, 210 N Industrial Park Drive, Hastings MI 49058
Telephone: 269-945-9501 Technical Services: 877-384-5464 Fax: 269-818-1680 Email: techsvcs@vikingcorp.com
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DESIGN CRITERIA - Horizontal Sidewall Window Sprinkler VK962
(Also refer to the Approval Chart.)
Continued from previous page.
Interior protection sprinklered building:
Identify which compartmented area has the most hydraulically demanding window
sprinklers. Calculate up to the most demanding 46.5 linear feet (14.2 linear meters) of window sprinklers on one side of the glazing.
The 46.5 linear feet (14,2 linear meters) is based upon 1.2 x the square root of the system area of operation, when the system area
of operation is 1500 ft
2
(140 m
2
). in accordance with NFPA 13 Light/Ordinary Hazard density curves.
Where the area of Glazing is less than 46.5 linear feet (14.2 linear meters), all window sprinklers on one side shall be calculated.
If an area reduction for quick response sprinklers is utilized, the linear length of the calculated window sprinklers may be reduced,
but in no case shall be less than 36 linear feet (1.2 x √900).
If a single fire can be expected to operate window sprinklers and sprinklers within the design area of a hydraulically calculated
system, the water demand of the window sprinklers shall be added to the water demand of the hydraulic calculations and shall be
balanced to the calculated area demand.
If the window sprinklers are located in an area other than the hydraulic design area, the demand of the window sprinklers is not
required to be added to the demand of the remote hydraulic design area. However, it is necessary to prove hydraulically the
simultaneous operation of the window sprinklers and the ceiling sprinklers adjacent to the window sprinklers.
Interior protection non-sprinklered building:
Calculate all sprinklers on the most demanding side of the glazing assembly within
the enclosure.
Exterior exposure protection:
Calculate all sprinklers controlled by the deluge valve using the design requirements of NFPA.
Duration of water supply:
Duration of water supply must comply with requirements of NFPA. If window sprinklers are used to
provide the equivalency of a fire rating, the water supply must be capable of supplying water for the required rating period.