Fabrication marks and holes shall be ground and finished to
provide a smooth and neat appearance for each plate. Each plate
shall be primed and painted.
]2.2.19.2
Visual Alarm Signals
**************************************************************************
NOTE: Locate strobes wall mounted in corridors no
more than 4570 mm 15 feet from the end of a corridor
with 30.48 m 100 feet maximum distance between
strobes. Where there is an obstruction to the
viewing path in the corridors, such as a
cross-corridor door or ceiling elevation change,
consider the obstruction as defining a new corridor.
Provide wall mounted strobes in rooms accessible to
the public, such as conference rooms, restrooms,
courtrooms, cafeterias, and auditoriums in
accordance with NFPA 72.
**************************************************************************
Provide strobe light visual alarm signals which operate on a supervised 24
volt DC circuit. The strobe lens shall comply with UL 1971 and conform to
the Americans With Disabilities Act. The light pattern shall be disbursed
so that it is visible above and below the strobe and from a 90 degree angle
on both sides of the strobe. The strobe flash output shall be a minimum of
[15] [_____] candela based on the UL 1971 test. The strobe shall have a
xenon flash tube. Visible appliances may be part of an audio-visual
assembly. [Where more than two appliances are located in the same room or
corridor, provide synchronized operation.]
[2.2.19.3
Fire Alarm Horns
**************************************************************************
NOTE: Where horns or bells are used for fire alarm
notification, calculate the proper locations for
these devices as detailed in "Designing Fire Alarm
Audibility," which is contained in the Society of
Fire Protection Engineers (SFPE) Handbook of Fire
Protection Engineering. Submit the calculations at
the 35 percent design review.
**************************************************************************
Provide [surface] [semi-flush] mounted electronic multi-tone horns that
produce a minimum of four distinct sounds, suitable for use in an
electrically supervised circuit. Horns shall have a rating of 90 dBA at
3050 mm 10 feet when tested in accordance with UL 464 while emitting a slow
whoop tone. Output from the horn shall be [three-pulse temporal pattern]
[the slow whoop tone] [_____]. Where horns and strobes are provided in the
same location, they may be combined into a single unit.
][2.2.19.4
Fire Alarm Bells
**************************************************************************
NOTE: Where horns or bells are used for fire alarm
notification, calculate the proper locations for
these devices as detailed in "Designing Fire Alarm
Audibility," which is contained in the Society of
Fire Protection Engineers (SFPE) Handbook of Fire
Protection Engineering. Submit the calculations at
SECTION 13855N
Page 34
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