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Research Investigation for Determination of Residential Sprinkler Performance.

pdf icon Research Investigation for Determination of Residential Sprinkler Performance. (1738 K)
Underwriters Laboratories, Incorporated

NIST GCR 05-875; 70 p. February 2004.


National Institute of Standards and Technology, Gaithersburg, MD


sprinklers; residential buildings; fire investigations; fire research; sprinkler systems; test facilities; test methods; water flow; fire tests; scenarios; UL 1626; fire growth; fire suppression; thermocouples


A total of 22 fire tests were conducted to generate data and information relative to the performance of specific residential sprinklers when a total flow of 1.4 times the Listed flow rate of one sprinkler was supplied to the system. The flow rate provided to the system was maintained at this value regardless of whether one or two sprinklers operated. The fire scenarios used in this test series were similar to those described in UL1626 except that 7 of the tests were conducted with the simulated furniture fuel package located along a wall centered between two sprinklers. In each of the 15 tests involving the corner fire scenario, only one sprinkler operated which limited the room temperatures as follows: a) The maximum temperature 3 inches (76 mm) below the ceiling described in this report did not exceed 600DGF (316DGC). b) The maximum temperature 5-1/4 feet (1.60 m) above the floor did not exceed 200DGF (93DGC), nor more than 130DGF (54DGC) for more than any continuous 2-minute period. c) The maximum ceiling material temperature 1/4 inch (6 mm) behind the finished ceiling surface did not exceed 500DGF (260DGC). In each of the 7 tests conducted with the fire source located between two sprinklers, at least two sprinklers operated which resulted in a flow provided to each operated sprinkler of approximately 0.7 times the Listed flow.