DELINEATORS 710.01 697 SECTION 710
710.01 Reflectors
A.General Provide circular reflectors mounted on posts to form delineators with a mounting hole through the center. Ensure the reflector can accommodate a 3/16 in [4.76 mm] nominal diameter blind rivet expanded to 0.196 in [4.98 mm] without fracturing. Alternatively, make the center mount reflectors with an aluminum housing.
B.Definitions Incidence angle. The angle between the direction of light incident on the reflector and the direction of the reflector ’s axis. Divergence angle. The angle between the observer’s line of sight and the direction of light incident on the reflector. Specific intensity. The intensity, in candelas, that a reflector returns at the chosen divergence angle for each foot -candle [lux] of illumination at the reflector. Lens. Reflective area of a reflector.
C.Delineators Mount reflectors on galvanized steel posts for delineators on roadway shoulders and guard rail posts. For delineators on bridges, mount reflectors on galvan ized steel posts and brackets.
D.Acrylic Plastic Reflector Provide an acrylic plastic methyl methacrylate reflector in accordance with Federal Specifications L-M-5002, Type 1, Class 3. Provide reflectors with the following characteristics: A colorless cry stal, amber , or red transparent plastic face with a diameter of at least 3.0 in [76.2 mm]; A lens of at least 7.0 in² [4,516 mm²]; A heat sealable acrylic plastic or heat sealable metal foil back fused around the lens perimeter under heat and pressure; and A central mounting hole sealed against water and water vapor. Provide embossed aluminum housing with a thickness from 0.02 in ±0.002 in [0.51 mm ±0.051 mm]. Back center mount reflectors without aluminum housing with a vapor -tight, hermetically -sealed pla stic backing. Provide a lens with a smooth front surface free of projections or indentations, except for the central mounting hole and identification, with a rear surface bearing a prismatic configuration that will
710.02 Delineators
698 affect the total internal reflection of l ight. Mold the manufacturer’s name or trademark into the lens face.
E.Specific Intensity Use reflectors as delineators or markers in accordance with Table 710:1, regardless of reflector orientation. Table 710:1 Minimum Specific Intensity for Reflectors Light Angles, ° Specific Intensity, cd/lx Divergence Incidence Crystal Amber Red 1/10 0 11.1 6.6 2.7 1/10 20 4.4 2.6 1 1/3 0 1.9 1.1 0.46 1/3 20 0.7 0.46 0.19
F.Specific Intensity Test The Department will determine the specific intensity in accordance with AASHTO T 257. The Resident Engineer will not accept reflectors that fail to meet the minimum specific intensity. The Resident Engineer will not accept a lot or shipment if more than 4 percent of the reflectors fail, or if the lot or shipme nt consists of 25 or fewer reflectors, if more than one reflector fails.
G.Seal Test The Department will use the following test to determine if a reflector is sealed against dust and water: Submerge the samples in water at room temperature, Subject the submerged samples to a vacuum of 2.45 psi [16.9 kPa] for 5 min, Restore atmospheric pressure and leave the samples submerged for 5 min, and Examine the samples for water intake. The intake of any water by the sample constitutes failure. The Resident Engin eer will not accept reflectors if tests show a failure rate of more than 4 percent.
710.02 Posts
A.Galvanized Steel Delineator Posts Cut, drill, punch, fabricate, and galvanize a finished channel -type or hat -type delineator post as shown on the Plans and in accordance with the following: Make the galvanized channel -type post from a 1½ in × ½ in × ⅛ in [38 mm × 12 mm × 3 mm] steel bar channel. Drill, punch, and cut to the length required by the Contract. Ensure the post is compatible with the delineator t ype required by the Contract. DELINEATORS 710.02 699 Optionally, use an alternative galvanized steel hat section post rolled from sheet steel to the dimensions shown on the Plans. Ensure the alternative steel post before galvanizing has a weight [mass] of 1.12 lb [1.67 kg] per linear foot [meter] with a tolerance of ±3.5 percent. Provide the correct size fasteners for the type of post. Cut, drill, and punch before galvanizing. Coat the posts with at least 2.0 oz/ft² [610 g/m²] of zinc coating in accordance with AASHTO M 111.
B.Flexible Delineator Posts For a flexible delineator post, use Type III retroreflective sheeting material. The Department will allow the sides of the post facing traffic to be flat or curved. Ensure the sides have at least 3.0 in [76.2 mm] of wide, flat surface to which the reflective sheeting can adhere. Provide posts at least 62 in [1,575 mm] long. Ensure the lower end of the post facilitates installation and replacement. Attach reflective sheeting material to the post. Ensure sheeting is 9.0 in × 3. 0 in [229 mm × 76 mm] with 1.0 in [25 mm] gaps (beginning 1.0 in [25 mm] below the top of the post) and is white, yellow, or red as shown on the Plans. The Department defines mono -directional delineator posts as posts with reflective sheeting material on one side, and bi -directional delineator posts as posts with reflective sheeting material on both sides or with one to three reflective sheeting strips applied around the post.
1.Materials Provide posts manufactured from any combination of thermosetting r esins, plasticizers, coloring pigments , and inert fillers. Provide Type III retroreflective sheeting material in accordance with Subsection 719.04,”Retroreflective Sheeting.”
2.Performance Ensure the posts are capable of remaining upright and in service at temperatures from 0°F to 100°F [−17°C to 37°C] and after ten vehicle impacts by mid -sized sedan traveling at 55 mph [88 km/h].
3.Additional Testing
a.Temperature Resistance Place a post inside a conditioning chamber for at least 2 hr at a temperature from 0°F to 140°F [−17°C to 60°C]. Secure a segment of post 36 in [914.4 mm] long, bend 90°, and release. Perform the procedure three more times. The Resident Engineer will not accept posts that crack, are perm anently deformed, or do not straighten out within 60 sec after testing.
b.Weathering Ensure posts do not change in color, flexibility, or integrity after exposure for 300 hr in an Atlas -Sunshine Weather -o-Meter fitted with a 19 -102 cyclic gear.
711.02 Traffic Stripe
700 SECTION 711 TRAFFIC STRIPE
711.01 Material for Hot -Applied Thermoplastic C Ompounds
Provide hot -applied thermoplastic compound in accordance with AASHTO M 249. Provide binder component made of alkyd or hydrocarbon based mate rial.
711.02 Permanent Pavement M Arking Tape
Provide plastic striping tape free of cracks with straight and unbroken edges. Provide material in rolls with no greater than three splices per 150 ft [45.7 m]. Conform preformed words and symbols to the applicable shapes and sizes in accordance with the MUTCD. Package plastic striping tape in standard commercial containers to prevent damage during shipment and storage. Ensure the plastic striping retains the pr operties required by the Contract when stored at temperatures no greater than 100°F [38C] and for no longer than 1 year. Provide plastic striping tape in accordance with Subsection 711.02.A, "Composition," through Subsection 711.02.L, "Effective Performance Life."
A.Composition Distribute uniformly and firmly bond plastic materials, pigments, and glass beads on the top surface of retroreflective, preformed pavement marking film. Provide pre -coat preformed plastic film with a pressure -sensitive adhesive that is compatible with bituminous concrete and portland cement concrete road surfaces.
B.Skid Resistance Ensure the retroreflective preformed film surface provides skid resistan ce value of at least 35 British Pendulum Number when tested in accordance with ASTM E 303.
C.Thickness Provide a thickness from 0.06 in to 0.09 in [1.52 mm to 2.29 mm] for preformed plastic film, without adhesive, for lane and edge lines.
D.Tensile Stren gth and Elongation Provide film with a tensile strength of at least 40 psi [275.8 kPa] of cross section when tested in accordance with ASTM D 638, except, test a 6 in × 1 in [152.4 mm × 25.4 mm] sample from 70°F to 80°F [21.1°C to 26.7°C] using a jaw speed from 10 in to 12 in [254 mm to 304.8 mm] per minute. Provide the sample with an elongation of at least 75 percent at break when tested by this method.
E.Conformability Provide preformed film that conforms to pavement contours, breaks, and faults at norm al pavement temperatures. Provide preformed plastic film that fuses with itself and previously applied marking film of the same composition.
Source: Oklahoma Standard Specifications for Highway Construction, 2019 Edition. Pages 711–713 of 935.