Item 18 - Traffic Signal Installation at Segerstrom Avenue and Rosewood Avenue

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CITY OF SANTA ANA SPECIFICATIONS PROJECT NO.: 25-6030 TRAFFIC SIGNAL INSTALLATION AT SEGERSTROM AVENUE AND ROSEWOOD AVENUE substrate up to and coincident with the cut edge of the sign panel shall be sufficient basis for rejection of the entire sign panel. All treatment tanks and/or spray -applied systems must be performed on the contractor premises, to ensure proper adhesion of reflective sheeting materials. All treatment tanks or spray -applied systems shall be charged with fresh chemicals at least once a year. If pretreatment is performed by immersion methods, the tanks must be sufficient size to accommodate the complete panel. Titration equipment shall be available for the inspectors to check the solutions strengths. The cleaned and coated base metal shall be handled only by a mechanical device or by operators wearing clean cotton or rubber gloves. After cleaning and coating operations, the panels shall be protected at all times from contact or exposure to grease, oils, dust or other contaminates. The front and back surfaces of the aluminum base metal shall be cleaned, deoxidized, and coated with a light tightly adherent chromate conversion coating free of any powdery residue. The base metal pretreatment process shall be in conformance with Section 5, "Recommended Processing methods" of ASTM Designation B-449. The coating weight shall be 30-100 mg/sq.ft. (285-950 mg/sq.m.), A class 1 coating. 2. Sign Message and Reflectorized Material: Sign panels with identical legends shall be displayed on both sides of the sign frame unless otherwise indicated. Letter size, style, spacing, arrows, and figures shall conform to the current standards established by Caltrans. a. The legends or street name shall be 8" (200 mm) upper case and 6" (150 mm) lower case. Series D shall be used. b. Street suffixes and block number will be 4" (100 mm). Series D shall be used. c. 1" (27 mm) border. d. Message layout shall be per attached drawing. Side margins and spacing may be compressed when necessary to stay within sign length. 3M Diamond Grade DG3 Series 4000 or equivalent shall be used on both fore and background with anti -graffiti overlay that has UV inhibitors. The standard color shall be white legends, letters, borders, etc., on a screened green background. No cut out legends, letters or border shall be used. Signs shall have graffiti coating or film (such as 3M 1160 Overlay) with UV inhibitors as recommended by the manufacturer of the reflective material. Neither the color nor the reflective intensity of the finished sign panel shall be significantly diminished by the use of graffiti remover when used in a manner approved by Caltrans and the sheeting manufacturer. 73