926MISCELLANEOUS MATERIALS

926.01Flexible Delineator Posts

Flexible delineator posts shall be made of impact resistant thermoplastics. The post shall be straight along its center line and have a smooth surface free from cracks, flaws, seams, laps, blisters, and edges affecting the strength, durability, or appearance. The cross-section width shall not exceed 6 in.

The reflective sheeting on all posts sha ll be in accordance with 919.01(b)1 and shall have minimum dimensions of 3 by 8 in. Reflective sheeting shall be applied 10 directly to the post and protected in a manner that minimizes damage to the sheeting upon impact.

The color of the post and the reflective sheeting shall match the color of the adjacent edgeline.

Only flexible delineator posts from the QP L of Flexible Delineator Posts shall be used. Flexible delineator posts will be placed and maintained on the QPL in accordance with ITM 806, Procedure H.

Roadside delineator post shall use an anchor sufficient to keep the post securely embedded in the soil.

Surface-mounted post shall have either a surface-mounted base capable of bolting or adhering to the pavement or an anchor cup embedded in the pavement. Bases shall be made of materials suitable for securely mounting the vertical portion to the roadway. Materials used to attach the base or in-pavement anchor cup to the roadway surface shall be in accordance with the manufacturer's recommendations. 30

The reflective sheeting on surface-mounted posts shall consist of two 3 in. wide wraps around the post separated by a 3 in. gap beginning 1 in. down from the top, or as shown on the plans. 926.01

926.02Delineators

Acrylic plastic delineators shall consist of a hermetically sealed optical system with a circular plastic face and prismatic molded rear surface. The optical system shall 40 have a minimum diameter of 3 in. with a minimum area of approximately 7 sq in. The trademark of the manufacturer shall be molded legibly into the face of the lens. Color shall be clear, red, or yellow in daylight as well as when viewed by reflected light at night. Photometric or optical requirem ents shall equal or exceed the following minimum values.

Observation Angle, Degrees Entrance Angle, Degrees Specific Intensity, Candlepower/Footcandle Clear Yellow Red 0.1 0 119 79 28 0.1 20 47 28 11 Note: The observation angle is the angle at reflector between the observer’s line of sight and direction of light incident on reflector. The entrance angle is the angle at the reflector between the direction of light incident on it and the direction of reflector axis. The specific intensity is the candlepower returned at the chosen observation angle by a reflector or reflective surface for each footcandle of illumination at the reflector.

The opaque backing shall be made from aluminum sheet having a minimum thickness of 0.02 in. The backing shall form an integral part of the delineator and shall retain the optical system securely. A single aluminum grommeted hole in the center of 50 the reflector shall be provided for mounting. The inside diameter of the grommet hole shall be 3/16 in.

Only acrylic plastic delineator models and colors from the QPL of Delineators shall be used. Acrylic plastic delineators will be placed and maintained on the QPL in accordance with ITM 806, Procedure G.

Reflective sheeting delineators shall consist of reflective sheeting affixed to an aluminum backing material. The white delineator shall be 3 by 8 in. ±1/8 in. The 60 yellow delineator shall be 5 by 5 in. ±1/8 in. The backing material shall be in accordance with 919.01(a) except the minimum thickness shall be 0.064 in. Reflective sheeting shall be in accordance with 919.01(b)1.

There shall be two mounting holes, 3/16 in. in diameter, with one at the top and one at the bottom. The holes shall be 6 in. ±1/16 in. center to center and in the corners of the square units. Completed delineators shall be dip coated with a high gloss clear finish coat as specified and supplied by th e sheeting manufacturer. The finished units shall be clean cut, sharp, and have essentially a plane surface.

926.02

A Type C certification in accordance with 916 shall be provided for the reflective sheeting delineators.

The delineators shall consist of a transpar ent acrylic plastic face, herein referred to as the lens, and an opaque back fused to the lens under heat and pressure around the entire perimeter to form a unit permanently sealed against dust, water, and water vapor. The reflector lens shall be colorless.

The lens shall consist of a smooth front surface free from projection or 80 indentations other than for purposes of identification or orientation of the reflector. The rear surface shall have a prismatic configuration such that it will affect total internal reflection of light. The manufacturer’s trademark shall be molded legibly into the face of the lens.

The reflector lens, having a minimum effec tive reflex area of 6.5 sq in., shall be methyl methacrylate in accordance with Federal Specification LP-380C, Type 1, Class

Only barrier delineator models and colors from the QPL of Delineators shall be used. Barrier delineators will be placed and maintained on the QPL in accordance with ITM 806, Procedure G.

Temporary barrier delineators shall consist of a Type III or higher sheeting in accordance with 919.01(b)1 affixed to a reboundable substrate. The delineator shall be 8 by 12 in. vertically mounted. The mounting bracket used to affix the delineator to the barrier shall not be more than 3 in. vertical.

926.03Alternate Material Guardrail Blockouts

Non-timber blockouts shall be dimensioned as tested and shall be used with the type of guardrail as tested in accordance with NCHRP 350 or MASH. Blockouts shall be accompanied by a copy of the FHWA eligibility letter stating that the product complies with the requirements of NCHRP 350 or MASH test level 3.

Alternate material blockouts meeting the criteria may be used interchangeably with timber blockouts as long as the line and grade of the face of the guardrail is true to that shown on the plans.

926.03