Performance of Home Smoke Alarms - National Institute of ...

Table 14. Calculated tenability for a flaming ignition test of a mattress, test SDC05Measurement LocationTime from Ignitionto UntenableConditions (s)Final TenabilityValue at End of TestISO Gas FED = 0.3Remote Bedroom (A) 0.024Hallway Outside Remote Bedroom (C) 0.024Front Door Hallway (F) 0.029Main Bedroom (BEK) 0.08ISO Convected Heat = 0.3Master Bedroom (A) 0.009Burn Room Bedroom (B) 0.273Hallway Outside Remote Bedroom (C) 0.016Hallway Outside Main Bedroom (D) 0.013Living Area (E) 0.02Front Door Hallway (F) 0.022Closed Bedroom (G) 0.004Smoke Obscuration = 0.25 m -1Remote Bedroom (A) 197* 0.276Main Bedroom (B) 137 0.329Hallway Outside Remote Bedroom (C) 182 0.341Hallway Outside Main Bedroom (D) 162 0.403Living Area (E) 177 0.26Front Door Hallway (F) 217* 0.291Closed Bedroom (G) 0.006* occurs after initiation of suppression5.5 Assessment of Overall Alarm PerformanceWith 43 separate alarms throughout the structure in each test, an assessment of overallperformance of the alarms requires some grouping of the alarms. For existing homes (and allhomes, prior to 1993) smoke alarms are required outside the sleeping rooms and on eachadditional story of the home. For this report, this arrangement will be referred to as “everylevel” and represents the minimum arrangement allowed by code. In 1993 the National Fire122