656— Delineators

656.1 Description

1 Furnish, fabricate, and install delineators .

656.2 Materials

656.2.1 General

1 Use the following types of delineators as shown on the Plans and Standard Drawings : • Post-mounted plastic reflectors, • Flexible posts with reflective sheeting, • Post-mounted flat sheet aluminum with reflective sheeting, • Flexible bridge mounted, barrier mounted, or parapet mounted units with reflective sheeting, or • Prismatic plastic reflectors with aluminum angle bridge or median barrier mounts.

656.2.2 Prismatic Plastic Delineators

1 Provide center mounting prismatic -plastic delineators consisting of a hermetically sealed, acrylic plastic, reflex reflector in an embossed aluminum housing with a single grommet mounting hole. 2 Use 0.020- in. 5052- 0 aluminum or other alloy approved by the Director of Traffic Engineering for housing formed to approximately a 3.25- in. diameter and to a depth that retains the acrylic reflector. 3 Expand a 3 /16-in. inside diameter aluminum grommet in the reflector mounting hole. 4 Provide an acrylic plastic reflector consisting of a transparent plastic face with 7 sq in. of reflective area referred to as the lens, a heat sealable plastic coated metallic foil back fused to the lens under heat and pressure around the entire perimeter of the lens, and a central mounting hole to form a unit permanently sealed against dust, water, and water vapor. Provide reflectors that are white, yellow, or red as required. 5 Ensure that the lens consists of a smooth front surface free from projection or indentations other than the central mounting hole and identification and with a rear surface bearing a prismatic configuration that affects the total internal reflection of lig ht. Identify the reflector unit by the manufacturer’s trademark.