833SIGN SUBSTRATES

833.01ALUMINUM

.01 Panel Signs. Conform to ASTM B 221, Alloy 6063-T6. Fabricate signs

from 12-inch wide extrusions and, if specified, compatible 6-inch wide extrusions. When a 6-inch extrusion is specified, use it as the bot tom panel of the sign. Typical cross sections and minimum weights per foot are specified in the Plans. Use compatible side extrusions on all sign edges. Prepare surfaces of extr usions composing the sign face to receive retroreflective background material according to the extrusion and retroreflective material manufacturers’ recommendations. Provide all remaining surfaces of extrusions and side extrusions with a soft matte finish.

.02 Sheeting Signs. Conform to ASTM B 209, Alloy 6061-T6 or 5052-H38

Fabricate signs of the size and shape specified. Provide a thickness of 125 mils if any single edge dimension of the sign exceeds 3 feet. If no single edge dimension exceeds 3 feet, provide a thickness of 80 mils. Prepare the side of the sheet to be used as the sign face to receive retroreflective background material according to the sheeting and retroreflective material manufacturer’s recommendations.

SECTION 834 LIGHTING

834.01GENERAL. This section covers the requirements for lighting materials

Materials shall be approved by Engineer prior to utilization on a project. Certain lighting materials are included on the Department’s List of Approved Materials.

834.02CONCRETE. Use Class A concrete. Conform to Subsections 601.02 and

601.03

834.03STEEL REINFORCEMENT. Steel reinforcement shall have minimum yield

strength of 60,000 psi and meet ASTM A615.

834.04GROUND RODS. Provide composite shaft ground rods consisting of a pure

copper exterior that has been inseparably, molten-welded to a steel core. Use copper-clad style ground rods with a minimum plating thickness of 10 mils. Rods shall be certified to conform to ANSI/NEMA GR1. Equip the rods with copper or bronze clamps that are the correct size for the rod being used.

.01 Conventional Poles, Lighting Cabinets, and Services. Use rods with a

minimum diameter of 5/8 inch and a minimum length of 8 feet.

.02 High Mast Lighting Poles. Use rods with a minimum diameter of 3/4 inch

and a minimum length of 10 feet. 834.05 CONDUIT. Ensure the conduit is the size specified on the plans and detail sheets.

834.05.01 Rigid Steel and Fittings. Provide conduit from the Department’s List of

Approved Materials. Use rigid steel conduit fittings that: are zinc coated, meet the requirements of ANSI C-80.1, and have UL6 Certification.

.02 Schedule 40/80 PVC and Fittings. Provide conduit from the Department’s

List of Approved Materials. Use schedule 80 polyvinyl chloride fittings having the same chemical and physical properties as the conduit with which it is to be used and meeting the requirements of UL 514B. Use joints that are made in accordance with the manufacturer's recommendations. Each conduit and fitting shall bear the Underwriters Laboratories, Inc. label. Other components shall conform to the following: Boxes UL514C, Covers UL514D, and Enclosures UL50. All PVC bushings shall be end bell type.

.03 Stainless Steel and Fittings. Use stainless steel meeting the requirements

of ASTM A240/A240M. Use joints that ar e made in accordance with the manufacturer's recommendations. Each conduit and fitting shall bear the Underwriters Laboratories, Inc. label.

.04 Aluminum and Fittings. Use aluminum meeting the requirements of

ANSI C80.5, and UL 6A. Use fittings meeting the requirements of NEMA 3R and UL 514B. Use joints that are made in accordance with the manufacturer's recommendations. Each conduit and fitting shall bear the U nderwriters Laboratories, Inc. label.