2004 Specifications
CSJ 0134-02-045
SPECIAL SPECIFICATION
6333
LED Internally Lighted Street Name Signs
1.
Description. Furnish and install Light Emitting Diode (LED) internally lighted street name
signs attached to traffic signal poles as shown on the plans.
2.
Materials. Furnished in accordance with the NEC. Conform Signs and sign messages to
the dimensions and details shown on the plans and the requirements shown below. Use
single side message or double side message signs as shown on the plans.
Ensure materials conform to Departmental Materials Specification DMS-8311, except that
the minimum average brightness reading at the letters is 600 lux instead of 1600 lux.
Make a brochure and/or shop drawing submittals on the fixtures, sign, sign message and
mounting hardware. Submit 6 sets of submittals to the Engineer for approval.
Unless otherwise shown on the plans or required in this specification, all fasteners and
screws in or on the fixture are stainless steel type 302 or 305, brass or aluminum. Galvanize
steel nuts, bolts, and hardware in accordance with ASTM A153. Ensure Clamp on street
name sign mast arms are in accordance with the details shown on the plans.
The sign assembly standard widths are 48 in., 72 in. and 96 in. Ensure standard height is
between 19 in. and 23 in. Use single or double faced as required by the plans.
Ensure body is aluminum one-piece box type enclosure and separate hinged door assembly.
Include drip rails for the top of the sign body to prevent water from entering the electrical
housing. Continuously weld all seams for a watertight seal. Place a minimum of 3 .25-in.
drain holes in the bottom of the sign body, a maximum of one foot from each side of the
sign.
Use glossy black for exterior color of the sign assembly. Powder-coat paint all exterior
surfaces of the sign assembly in accordance with Military Standard MIL-C-24712. Ensure
finish meets the requirements of ASTM D 3359, ASTM D 3363, and ASTM D 552. Quality
assurance program will meet MIL-1-45208A.
Use sides with a removable face. Use one-piece aluminum door frame construction. Use
doors that open in a downward motion. Secure sign face with four frame plates, (bottom,
top, and two sides), secured by studs and nuts, holding the sign face in place. No Slide–in
grooves will be used. Use full-length stainless steel hinge for the doors bottom edge. Seal
Door with a UL listed foam gasket. Install gaskets continuously on the doorframe to seal the
sign face to the doorframe. Install another strip on the sign body matching where the door
seals. Secure door from opening by using a minimum of two stainless steel ¼-20
thumbscrews to prevent the door from opening when the sign is flexed. Screw threaded
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portion of the thumbscrew into captive nut assembly on the sign body. Use hardware of the
type 304 or 316 stainless steel.
Construct sign face of 1/8 in. white polycarbonate.
Use UL approved foam gaskets, to provide a watertight seal between the door and the
housing and between the sign panel and the doorframe.
Include replaceable fuse at the electrical power wire entrance compartment.
Design, test and construct sign panel and mounting assemblies so that no permanent
deformation, warping or failure will occur when subjected to 110 mph wind loads.
Include solid-state high flux/high output ultra high brightness white LED light engine strips
(described in detail below), utilizing state-of-the-art high power LED’s and high efficient
heat dissipating metal carrier body. Ensure length of strips effectively light the sign face.
LED light engine maximum power values will not exceed 108 W for a 6-ft. sign that is
illuminated on both sides and 144 W for an 8 ft. sign illuminated on both sides.
Either of the following configurations will be allowed:
Mount light strips horizontally in the top of the sign at an angle towards the face of the sign.
(1 row for single face and 2 rows for double face signs). Utilize integral internal reflectors
of the strips that will maximize the light output at the sign face. Mount light strips directly
to the top of the sign body so as to be thermally linked to the sign body for heat dissipation.
Use secondary reflector in the bottom of the sign to spread of the light evenly over the lens.
Use reflectors made of mirror finish aluminum alzak material.
or; mount light strips horizontally in 3 rows per illuminated side, within the interior of the
sign of adequate distance from each side (for double face signs) or from the single side (in
single face signs) to allow for proper light distribution across the sign face so as there are no
dark spots on the sign face. Lengths of the strips are 33 or 45 in., with LED’s on 6 in.
centers. Ensure individual light strip will does not consume greater than 9 watts at the 33 in.
length (for 3 ft. strips) and greater than 12 watts at the 45 in. length (for 4 ft. strips). Ensure
maximum power consumption per foot of the sign does not exceed 9 watts for single-sided
signs or 18 watts for double-sided signs. Use 120Vac operating voltage. Viewing angles of
the LED’s will be from 70-120 degrees with the color temperature of the white LEDs of
3500-4500 ºK to 8000 ºK.
Locate screened weep holes at strategic points in the bottom of the housing assembly to
allow drainage of condensation.
Construct sign fixture housing of extruded, cast and/or fabricated aluminum components.
Single sided signs with aluminum panels, minimum 0.050 in. thick, placed on back side of
fixture in sign panel position. Frame and gasket aluminum panels in the same manner as
sign panels.
Use a mounting block clevis pin that is minimum 3/8 in. stainless steel bar through oilimpregnated bronze sleeve bearings to allow for controlled movement of the sign swing
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under wind gust loads. Provide an adjustment bolt for each mounting block to permit
leveling of the sign.
Form mast arm clamp brackets and hanger bars of heat treated aluminum bar stock or
galvanized steel and ensure adequate design and strength.
3.
Sampling. Sample in accordance with Test Method Tex-714-I, except that the minimum
sample number will be one.
4.
Construction Methods. Fabricate and install internally lighted street name signs in
accordance with the details and dimensions shown on the plans, specified, or as approved by
the Engineer. Install signs level and ensure brackets are plumb. Ensure installation is neat
and professional in appearance.
Use industry and utility safety practices when erecting signs located near any overhead
utilities. Consult with the appropriate utility company prior to beginning such work.
Ensure power for internally lighted street name sign is powered from the same service pole
that provides power to the traffic signal on which the sign is mounted. Install a 20 amp
circuit breaker and photocell when necessary.
Signs will be grounded by an insulated or bare equipment grounding conductor connected
between the fixture and the equipment grounding conductor in the base of the pole (due to
electrical isolation provided by sleeve bearings).
5.
Warranty. Warrant the LED light engine for the illuminated street sign against any failure
due to workmanship, material defects or intensity within the first 60 months of field
operation. Ensure the LED light engine meets or exceeds minimum luminous intensity
values during the 60 months of field operation over the temperature range of -40°C to
+74°C.
Ensure manufacturer provides a written warranty against defects in materials and
workmanship for LED signal modules for a period of 60 months after installation of LED
signal modules.
Provide replacement LED light engine modules within 5 days after receipt of failed LED
light engine l modules at no cost to the State, except the cost of shipping the failed modules
6.
Measurement. This Item will be measured as each unit installed, complete in place.
7.
Payment. The work performed and materials furnished in accordance with this Item and
measured as provided under "Measurement", will be paid for at the unit bid price for "LED
Internally Lighted Street Name Signs", of the size and type specified. This price will be full
compensation for furnishing and erecting the signs; for furnishing and erecting the support
arm clamp assembly; for furnishing and installing liquid tight flexible metal conduit; for all
required circuit breakers and photocells; and for all labor, tools, equipment and incidentals
necessary to complete the work.
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