Search Results "Visual Alarm"
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4.28 ALARMS
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4.28 Alarms
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4.28.1 GENERAL
Alarm systems required to be accessible by 4.1 shall comply with 4.28....
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4.28.1 General
Alarm systems required to be accessible by 4.1 shall comply with 4.28....
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4.28.3* Visual Alarms
Visual alarm signal appliances shall be integrated into the building or facility alarm system....
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4.28.3* VISUAL ALARMS
If provided, electrically powered internally illuminated emergency exit signs shall flash as a visual emergency alarm in conjunction with audible emergency alarms....
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4.28.3(1)
(1) The lamp shall be a xenon strobe type or equivalent.
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4.28.3(2)
(2) The color shall be clear or nominal white (i.e., unfiltered or clear filtered white light).
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4.28.3(3)
(3) The maximum pulse duration shall be two-tenths of one second (0.2 sec) with a maximum duty cycle of 40 percent. The pulse duration is defined as the time interval between initial...
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4.28.3(4)
(4) The intensity shall be a minimum of 75 candela.
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4.28.3(5)
(5) The flash rate shall be a minimum of 1 Hz and a maximum of 3 Hz.
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4.28.3(6)
(6) The appliance shall be placed 80 in (2030 mm) above the highest floor level within the space or 6 in (152 mm) below the ceiling, whichever is lower.
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4.28.3(7)
(7) In general, no place in any room or space required to have a visual signal appliance shall be more than 50 ft (15 m) from the signal (in the horizontal plane)....
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4.28.3(8)
(8) No place in common corridors or hallways in which visual alarm signalling appliances are required shall be more than 50 ft (15 m) from the signal....
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Scoping [4.1.3(14)]
Scoping [4.1.3(14)] ADAAG requires both audible and visual alarms in facilities that have emergency warning systems whether building-wide systems or self-contained units are provided....
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Visual Alarms [4.28.3]
Visual Alarms [4.28.3] In general, it is not sufficient to install visual signals only at audible alarm locations....
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Strobe Type and Color
Strobe Type and Color Research indicates high-intensity xenon strobe lamps to be the most effective and white light the most discernible. Colored lamps, particularly red, were...
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Intensity
Intensity To be effective, a visual signal (or its reflection from adjacent walls and ceiling) must be of an intensity that will raise the overall light level sharply, but not be so intense...
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Pulse Duration and Flash Rate
Pulse Duration and Flash Rate Visual alarm strobes produce a repetitive burst of high-intensity light. The repetition of this pulse at a regular interval is the flash rate....
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Mounting Height
Mounting Height ADAAG specifies a signal height 80 inches above the highest floor level within the space or 6 inches below the ceiling, whichever is lower. (This can be measured...
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Location and Spacing
Provisions for the spacing of visual alarms in hallways and corridors generally require one fixture every 100 feet....
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Auxiliary Alarms [4.28.4]
Auxiliary Alarms [4.28.4] A portion of sleeping units in transient lodging facilities, including those required to be accessible to persons who use wheelchairs, must have a visual alarm...
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[F] 907.5 Occupant notification systems
[F] 907.5.2 Alarm notification appliances. ......
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907.5.2 Alarm notification appliances.