Concealed lighting shall be provided within panel framing members.
Lighting shall be controlled by a photocell device. [Top] [Back] lighting
shall be provided by [T-12 slimline lamps, [120] [277] [_____] volt,
60-hertz, single-phase, Type 1, or Type 2 ballast] [_____]. Ballast shall
be integrally mounted, high power factor and rated for use down to minus 29
degrees C minus 20 degrees F ambient starting temperature. Ballast and
wiring within the sign shall be in metal raceways. Electrical equipment
shall be UL or FM listed and comply with NFPA 70. Illumination shall be
evenly distributed. A switch on the interior of the sign shall be provided
to turn off power in the sign. Switch shall be readily accessible when
sign is open.
2.3
GRAPHICS FOR EXTERIOR SIGNAGE SYSTEMS
2.3.1
Graphics
**************************************************************************
NOTE: Choose the appropriate paragraph for the
graphics application. The process of silk-screening
for large areas, type, etc. does not weather
properly without proper protective overspray
protection with UV inhibitors.
**************************************************************************
Signage graphics shall conform to the following:
a. [[Cast] [Custom fabricated] [Plate] aluminum letters, [6] [13]
[_____] mm [1/4] [1/2] [_____] inch thick shall be provided and
fastened to the message panel with concealed fasteners. Letters shall
project [_____] mm inches from face of panel.]
b. [Pressure sensitive precision cut vinyl letters [with reflecting
surface] [_____] shall be provided.]
c. [Message shall be applied to panel using the silkscreen process.
Silkscreened images shall be executed with photo screens prepared from
original art. Handcut screens will not be accepted. Original art
shall be defined as artwork that is a first generation pattern of the
original specified art. Edges and corners shall be clean. Rounded
corners, cut or ragged edges, edge buildup, bleeding or surfaces
pinholes will not be accepted.]
d. [Message letters shall be cut out from panel. Panel cutouts shall
be backed with [2.0 mm 0.080 inch FRP] [3.2 mm 0.125 inch acrylic]
where cutouts occur.]
e. [Message shall be cut out from panel. Acrylic letters [3] [6] [13]
mm [1/8] [1/4] [1/2] inch thick shall be projected through the cutout
area and chemically welded to 3.2 mm 0.125 inch thick acrylic backup
sheet.]
f. [Message shall be embedded in FRP sheet and completely covered with
thermosetting polyester resin. Message shall be embedded minimum 0.8
mm 1/32 inch. Sheets shall be processed in one piece, in one process,
to prevent delamination.]
g. [Message shall be applied using the frisket method.
Photomechanically reproduced graphic masks shall be applied to the sign
SECTION 10430
Page 12
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