Obstructions to sprinkler discharge pattern development

Kaiser, Daniel
July 2009
Minnesota Fire Chief;Jul/Aug2009, Vol. 45 Issue 6, p32
The article discusses the obstructions that can affect the sprinkler discharge spray patterns. According to the author, it is important to consider the basic performance objectives and to categorize obstructions when evaluating the impact of obstructions on sprinkler discharge development. The Beam Rule, Three Times Rule, Wide Obstruction Rule and Soffit Rule are the positioning criteria for possible obstructions that can affect the sprinkler's activation and ability to control fire.


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