These specifications define requirements for high performance, two-part system consisting of a drivable ground anchor and a replaceable, impact-resistant flexible post. This product may be used to provide delineation for roadways or other marking applications requiring long-term durability as well as vehicle and direct tire impact resistance.
2. GENERAL REQUIREMENTS
The ground mount shall incorporate a vertical tube to accept reflective sheeting, and allows for easy installation to the bottom anchor.
The material shall be a flexible polymer which shall be resistant to impact, ultraviolet light, ozone, and hydrocarbons, and shall remain impact resistant from – 20°F to +215°F.
The post and base shall exhibit good workmanship and shall be free of burns, discoloration, contamination, and other objectionable marks or defects that effect appearance or serviceability.
The installation system shall consist of pre-drilling a hole to the depth of 18″ to facilitate the bottom anchor, insert ground mount then back fill and tamper ground firmly around post.
3. PHYSICAL AND MECHANICAL REQUIREMENTS
The Ground Mount shall conform to the dimensions shown in figure1or figure 2.
The Ground Mount tube shall have a minimum cylindrical diameter of 2.25 inches or 3 inches.
The height shall be specified by the customer specification.
The anchor shall be eighteen inches (18″) in legnth.
The color of the channelizer shall be white, yellow, or orange, as dictated by appropriate MUTCD guidelines for the particular application.
3.3 TENSILE STRENGTH
The Ground Mount tube shall have a minimum tensile strength of 1500 pounds per square inch. The tensile stress shall be determined in accordance with “Standard Method of Test for Tensile Properties of Plastic”, ASTM designation D638 (Test Specimen Type I).
3.4 TEMPERATURE RESISTANCE
3.4.1 Heat Resistance:
The Ground Mount shall be conditioned a minimum of 2 hours at 120°F ± 3°F. The unit shall then be held in a vertical position on a solid surface, as it would be in field use, and the post member bent 90° such that the post end touches the floor surface. The post member shall return to within 5° of the upright position within 15 seconds. The bend test shall be repeated 3 times in quick succession, completing the test within 2.5 minutes of channelizer removal from the conditioned temperature.
3.4.2 Cold Resistance:
The Ground Mount shall meet requirements of 3.4.1 when conditioned -20° for 2 hours.
3.4.3 Cold Resistant Impact Test:
The tube portion of the Ground Mount shall be conditioned for a minimum of 2 hours at -20°F ± 3°F. The tube shall then be struck flush against a flat surface 3 times within two minutes after removal fro the conditioning chamber. To strike the tube it should be manually swung through a 90° arc, the tube shall no fracture or shatter upon impact.
3.5 IMPACT RESISTANCE
The Ground Mount shall be installed in accordance with the manufacture’s instructions. The Ground Mount shall be capable of withstanding a minimum of 75 impacts at 55 mph into the traffic face of the post by the bumper of a typical American Sedan.
The reflector shall be a 3″ minimum width impact resistant band of retro reflective sheeting with pressure sensitive backing unless otherwise specified by ordering agent.
Unless otherwise specified, the sheeting shall be placed a maximum of 2″ from the top of the tube. The sheeting shall be of appropriate color to meet requirements of MUTCD.