FLEXIBLE_DELINEATOR_POSTS_6-22-2011.doc

FLEXIBLE DELINEATOR POSTS, GUARDRAIL MARKERS

AND ANCHORING DEVICES

1 DESCRIPTION

This specification is for flexible delineator posts and guardrail markers with anchoring devices (as applicable).

2 REQUIREMENTS

A. Delineator Posts and Guardrail Markers

(1) Tubular Delineator Posts and Guardrail Markers shall consist of a flexible, durable, and non-discoloring material that is 2 to 4 inches in diameter and resistant to ultraviolet and infrared radiation. Tubular delineator posts and guardrail markers shall be permanently closed or capped to prevent moisture or debris from entering. The upper end of the post/marker shall be flattened to provide an area at least 3 inches wide and 12 inches long to accommodate retroreflective sheeting. Posts/markers shall be light gray in color. Additional Once installed, the delineator posts and guardrail markers shall be resistant to overturning, twisting, leaning or displacement. The posts must be compatible with an anchor that holds the post in place by a locking mechanism or bolting arrangement that provides a simple method of attaching the original post, or subsequent replacement posts, to the anchor with few to no tools. Simplicity, safety and function of this post-to-anchor connection will be a consideration in the award.

(2) Extrusion Delineator Posts and Guardrail Markers shall consist of a single curve, C-shaped thermoplastic extrusion a minimum of 3.75 inches wide, with 0.160 inch (typical) walls, comprised of a uniformly curved profile with a 3.0” radius. All delineator posts shall be capable of sustaining a minimum of ten (10) direct wheel-over impacts at 60 MPH (100 KPH) without damage to the post or the reflective sheeting applied to the post. All posts shall be constructed of UV-stabilized thermo-plastic polycarbonate (PC) for superior durability and weathering, conforming to the following material specifications:

B. Anchors.

(1) Tubular Delineator Posts and Guardrail Markers require 2 types of anchors:

i. Driveable Soil Anchor. The anchor for the tubular delineator post must be easily driveable in compacted gravel and durable enough to be reused in most cases as posts become damaged. Compatibility with the soil anchors presently in use will be a consideration in the award.

ii. Surface Mount Anchor. The anchor for the guardrail marker must be capable of attaching to a solid horizontal surface with the use of a single bolt or lag. The surface mount anchor shall have a footprint not to exceed 20 square inches or an overall height not to exceed 2 inches.

(2) Extrusion Delineator Posts and Guardrail Markers require 2 types of anchors:

i. Soft Soil Plastic Anchor: The plastic anchor shall meet the same physical properties as the extrusion delineator posts, shall be 2.0” (50.8 mm) in length, and of sufficient strength so as to resist pull out in multiple high speed impacts. Anchors shall be placed in slots at the bottom tip of posts prior to installation.

ii. Steel Anchor: The steel anchor unit shall be a hot rolled rail steel or new billet steel meeting the physical requirements of ASTM A499 and the chemical requirements of ASTM A1. The steel anchor shall be a uniform flanged channel post with nominal weight of 1.12 #/ft. (.418 kg) before holes are punched. Anchors shall be a minimum of 12” (304.5m m) in length and have a sufficient number of 3/8” (9.5 mm) diameter holes on 1” (25.38 mm) centers to facilitate attachment to flexible guide posts. Anchors shall be supplied with attachment hardware as recommended by the manufacturer.

C. Color

Delineator posts shall be constructed of UV-stabilized polymers and colors. The color shall be solid throughout and stabilized to resist UV degradation. Color shall be Gray/Light Gray, unless otherwise specified.

D. Retroreflective Sheeting When specified, retroreflective sheeting shall be 3” wide x 9” tall and applied to the flattened area of the post on one side. Retroreflective sheeting shall comply with ASTM 4956 Type III requirements and shall be white, yellow, red or green, as specified. The retroreflective sheeting shall be positioned within 2 inches of the top and applied in such a manner as to assure that the sheeting will not become detached from the post/marker before the reflectivity has faded below acceptable levels.

E. Performance Crashworthiness: delineators, guardrail markers and bases are required to meet the crashworthy criteria for category I devices contained in the testing and acceptance guidelines of the National Cooperative Highway Research Program (NCHRP) Report 350. Impact Resistance data for tests that have been performed on the identical product by the AASHTO NTPEP test location that includes both hot and cold weather conditions must be available. An official copy of the test report along with evidence that the product referenced is identical to that submitted for prequalification shall be available upon request.

Longevity: The following test reports, certified by a professional engineer, shall be available upon request: 1) Performance data for the tubular delineator and guardrail markers with regard to resistance to heat and cold, static rigidity and colorfastness; and 2) Performance data for the tubular delineator/driveable anchor system with regard to repetitive vehicular impacts, including combined bumper and direct wheel hits.

3 BID ITEMS

For use with Surface Mount Anchor

Standard delineator post, for use with Soil Anchor

(for Tubular Delineator Post or Guardrail Marker)

(for Tubular Delineator Post)

(Specified with either one slot for the soft soil anchor or two vertical holes)

(Specified with either one slot for the soft soil anchor or two vertical holes)

(Specified with either one slot for the soft soil anchor or two vertical holes)

(Specified with either one slot for the soft soil anchor or two vertical holes)

For use with Extrusion Delineator Post

For use with Extrusion Delineator Post

For attaching either Extrusion or Tubular Guardrail Markers to guardrail posts