Patent ID: 7712543
Filing Date: 2010-05-11
Classification: A62C

Abstract:
1. A method of designing a dry pipe residential fire protection system using hydraulic demand criteria of a wet pipe residential fire sprinkler system based on one or more fire protection standards, the dry system being for a residential dwelling unit having a fluid supply source defined by a flow and pressure and a plurality of compartments as defined in one or more of the fire protection standards, the fire protection standards being: 2002 National Fire Protection Association Standards 13, 13D, and 13R, the method comprising: determining a minimum quantity and location of residential fire sprinklers meeting the approval requirements of at least one of the fire protection standards including UL 1626 (October 2003), so as to be approved for use in wet pipe residential fire protection systems for a piping network filled with water in a wet pipe fire sprinkler system arranged to protect the plurality of compartments as defined in one or more of the fire protection standards, the fire protection standards being: 2002 National Fire Protection Association Standards 13, 3D, and 13R, the determining of the minimum quantity and location of the residential sprinklers being based upon hydraulic demand design criteria for the wet system designed under guidelines set forth by the applicable fire protection standards for the unit, such that the determining the minimum quantity includes: specifying the minimum quantity and location of residential fire sprinklers, as determined, for the dry system having a dry design area that is the same as the wet design area, wherein the residential sprinklers being a type of at least one of vertically-oriented and horizontally-oriented satisfying actual fire tests in accordance with UL 1626 (October 2003), the actual fire test being performed in accordance with UL Standard 1626 (October 2003) for each type of residential fire sprinkler including three tests each being performed in an arrangement including: when further in the first, second, and third testing arrangements, a fire source is ignited in accordance with UL Standard 1626 (October 2003), the residential fire sprinklers provide, in a maximum water delivery time of fifteen seconds of actuation of at least one sprinkler, a predetermined water flow rate over the coverage area to limit the maximum temperature measured by the second and third thermocouples to less than or equal to 600 degrees Fahrenheit (F.), the maximum temperature measured by the third thermocouple to be less than or equal to 200 degrees F. and less than or equal to 130 degrees F. for any continuous duration of more than two minutes, the maximum temperature measured by the first thermocouple being less than or equal to 500 degrees F.