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ST0301A-CS0806262010) Keith Marvin - Bethel Page 1 From: Keith Marvin To: Thornhill, Caleb Date: 6/26/2008 5:07 PM Subject: Bethel Attachments: DALLAS COUNTY R.O.W..pdf; Conflict (CIQ) Form.pdf; ILSN SPECIFICATION.doc Caleb, Here is some of the stuff we talked about... Keith Marvin, P.E. Project Engineer (972) 304 -3681 U w )u Mum OAUA$ me R.L. McDOWELL., and wife RUBY LL L. D.R.D.C I N 0 z FAX Pia. (817) 347 P. 0. BOX { X974 - 39M IOUTH FAMAY rt "e" Y6R, TEXAB 74P W EWJL o SCALE 1 t� 40 JULY 18, no r � u� R.L. McDOWELL., and wife RUBY LL L. D.R.D.C I N 0 z FAX Pia. (817) 347 P. 0. BOX { X974 - 39M IOUTH FAMAY rt "e" Y6R, TEXAB 74P W EWJL o SCALE 1 t� 40 JULY 18, SPECIFICATION CITY OF COPPELL SPECIFICATION FOR INTERNALLY ILLUMINATED STREET SIGNS 1.0 GENERAL • Illuminated street name sign shall be internally illuminated by means of an LED light generator system. • The sign assembly height shall be a minimum of 22" and maximum of 24", with standard widths of 48 ", 72" and 96". 2.0 FIXTURE • Exterior is extruded aluminum alloy, .078" thick, with aluminum cast end caps that are continuously welded with provisions for continuous seal between the housing and sign frame to resist the entrance of moisture, dirt and insects. Standard finish is shall be a powder- coated black finish, meeting the requirements of ASTMD 3359, ASTMD 3363 and ASTMD 552. • Top of fixture incorporates drip guards overhanging the panel face to offer protection from precipitation. Screened weep holes shall be located at strategic points in the bottom of the housing assembly to allow drainage of condensation. 3.0 LAMP GENERATOR SYSTEM • The LED light generator system shall provide lumen output to evenly illuminate the sign panel, which shall present a clearly visible message on the sign panel. The system shall include (integral or separate) a power supply / driver and LED's mechanically mounted to a substrate to provide means of removal or replacement. • The lumen output of the LED system shall provide a brightness of 220 cd /m minimum on the letter of the sign panel. The LED system shall maintain 220 cd /m for a minimum of 5 years. • The system shall draw no more than 120 watts of power. 4.0 SIGN PANEL • Sign panel to be high impact resistant shatterproof glass and fiber reinforced acrylated resin. • Sign color background, silk- screened, interstate green. • Panel to be laminated with a clear tedlar film to protect the legend from scratches and filter out ultraviolet radiation on weather exposed surface. • A full- length extruded aluminum hinge, integral with the sign housing and top panel framing member of the sign panel shall afford the means of attachment or removal of the panel without the use of tools. • The light transmission factor of the sign panel will provide a letter to background brightness ratio of 10:1 to 20:1. The luminance of the background shall not vary by more than 40% of the average background brightness reading. The luminance of the letters, arrows or symbols shall not vary by more than 20% from the average brightness reading. • White lettering, 12" upper case, 6" lower case Helvetica lettering, with 3" series "C" block numbers and arrows, to include a 3 color City Logo Legend in accordance with the Project Sign Logo. All legends will be silk- screened. No vinyl cut outs allowed. • Entire lens is framed and sealed including a full- length extruded aluminum hinge for straight -line travel and positive positioning to provide exceptional sealing. • A catch bar with two (2) solid brass knurled knobs and two (2) �/4 -20 captive nuts shall be provided at the bottom of the sign to secure the panel in a closed position. 5.0 REFLECTORS • The reflectors shall be formed from specular mirror finish aluminum material. The reflector(s) design shall evenly illuminate the entire surface of the sign panel. 6.0 TERMINAL BLOCKS / FUSES / CONDUCTORS • All wiring connections within the sign fixture shall terminate on a pnenolic barrier type, two -pole terminal block, rated at 15 amperes — 1000 volts. All current carrying parts of the terminal block shall be insulated from the fixture with the integral strips to provide insulation. • The unit shall be equipped with an internal fuse with appropriate rating to match power supply and shall be provided in the primary circuit compartment. 7.0 MOUNTING ASSEMBLY • The top shell of the housing shall provide for a full- length interlocking slide track, which permits the cast aluminum sign mounting blocks to be positioned with infinite lateral adjustment on top of sign assembly. The mounting block clevis pin shall be stainless steel bar through bronze sleeve bearings to allow fixture to swing freely to reduce wind load factors on mast arm. All mounting hardware (bolts, nuts, washers) shall be stainless steel. • Mast arm clamps brackets and hanger bars shall be formed of heat treated aluminum bar stock or galvanized steel and shall be of adequate design and strength. Fasteners are stainless steel and enable leveling to horizontal mast arms. 8.0 WARRANTY • A 2 -year product warranty should be provided on the illuminated street name signs. 10.0 ALTERNATE PRODUCTS • The models and brand name are descriptive and not restrictive, and are used to indicate type and quality level desired for comparison purposes. Bids on brands of like nature and quality may be considered for the items listed on the Bid Form. Manufacturer name and model number of alternative products should be provided on the Mfg. Name and Model Form. In the event that a bid is being submitted for an alternate product, a sample is required to be provided to Keith Marvin at the address shown below no later than 10 calendar days prior to the bid closing. 255 Parkway Boulevard Coppell, Texas 75019 11.0 ALTERNATE PRODUCTS • Any models and brand names shown on the plans are descriptive and not restrictive, and are used to indicate type and quality level desired for comparison purposes. Bids on brands of like nature and quality may be considered for the items listed on the Bid Form. Manufacturer name and model number of alternative products should be provided. In the event that a bid is being submitted for an alternate product, a sample is required to be provided to Keith Marvin at the address shown below no later than 10 calendar days prior to the bid closing. 255 Parkway Boulevard Coppell, Texas 75019 11.0 SHOP DRAWINGS The signs should be in accordance with this specification, the descriptions on the Bid Form and the information in the plans. Bidder should submit a set of plans including drawings showing scaled layout of legends as attachments to the Shop Drawings Form.