For temporary applications, use hot rolleds teel sheet piles and meet ASTM A328.
Prestressed concrete piless hall meet Section 1078. PAVEMENT MARKERS -1 TEMPORARY RAISED PAVEMENT MARKERS
Use raised pavement markers found on the NCDOT APL . Products must be current with the applicable AASHTO Product Evaluation & Audit Solutions workplan to remain on the NCDOT APL. . Use raised pavement markers of the prismatic reflector type, or better as approved by the Engineer . The markers shall be constructed either of an injection molded plastic body and base or consist of a plastic shell filled with a mixture of inert thermosetting compound and filler material. Either construction type shall contain one or more integrated prismatic reflective len ses to provide the required color designation. The minimum reflective area of the lens face is 2.0 sq.in. The color of the reflective pavement marker housing shall match the pavement marking color, which it supplements. All raised pavement marker reflectiv e lenses shall be in close conformance with the AMS - STD -595 colors as listed below when viewed at night. Crystal: Color No. 17886 (White) Yellow: Color No. 13538 Red: Color No. 11302
The epoxy shall meet Section 1081 -4. Review Subarticle 1081- 4(B) for description of epoxy types suitable for markers to be installed. Use an epoxy adhesive type that is appropriate for the pavement and ambient temperature per the manufacture’s recommendations. It is recommended that the ambient te mperature during application of Types II and IV epoxy shall be at least 50°F and preferably higher than 60°F. These adhesives harden relatively slowly at 50°F, but the hardening rate rapidly accelerates as temperature increases.
The hot bitume n shall meet Article 1081 -3.
As supplied by the manufacturer.
Furnish a Type 2 material certification in accordance with Article 106 -3 for all raised pavement markers before use.
-2 PERMANENT RAISED PAVEMENT MARKERS
Use raised pavement markers found on the NCDOT APL . Products must be current with the applicable AASHTO Product Evaluation & Audit Solutions workplan to remain on the NCDOT APL. The markers shall be constructed either of an injection molded plastic body and base or consist of a plastic shell filled with a mixture of inert thermosetting compound and filler material. Either construction type shall contain one or more integrated prismatic reflective lenses to provide the required color designation. Raised pavement markers
Plastic lenses shall have an abrasion resistant coating.
Potted marker shells shall be made of molded methyl methacrylate conforming to Federal Specification L P 380C, Type I, Class 3. Filling material shall be an inert thermosetting compound selected for strength, resilience, and adhesion a dequate to meet physical requirements of the s pecifications . Sand or other inert granulars shall be embedded in the surface of the inert thermosetting compound and filler material before its curing to provide a surface, which will readily bond to the adhesive.
Injection -molded markers shall consist of polymer materials selected for strength and resilience adequate to meet the physical requirements of the s pecifications . The bottom surface of the marker shall contain grooves or nons mooth structure designed to increase bonding with the adhesive.
All optical performance for permanent raised pavement markers shall conform to ASTM D4280.
All physical properties for permanent raised pavement markers shall conform to ASTM D4280.
Use hot bitumen adhesive for mounting the pavement markers to asphalt concrete roadways. The hot bitumen adhesive shall meet the requirements of Article 1081- 3. Other adhesives such as epoxy or cold bituminous adhesive pads are not acceptable on asphalt concrete roadways for permanent applications.
Use epoxy adhesive for mounting the pavement markers to concrete roadways. The epoxy adhesive shall comply with Section 1081- 4. Other adhesives such as hot and cold bituminous or adhesive pads are not acceptable on concrete roadways for permanent applications.
Furnish a Type 2 material certification in accordance with Article 106 -3 for all raised pavemen t markers before use. -3 NON- CAST IRON SNOWPLOWABLE PAVEMENT MARKERS
Use non-cast iron snowplowable pavement markers found on the NCDOT APL . Products must be current with the applicable AASHTO Product Evaluation & Audit Solutions workplan to remain on the NCDOT APL. The non-cast iron snowplowable pavement
marker shall consist of a housing with one or more glass or plastic face lens type reflective lenses to provide the required color designation. The marker shall be designed or installed in a manner that minimizes damage from snowplow blades. Plastic lens faces shall use an abrasion resistant coating.
The dimension, slope and minimum area of r eflecting surface shall conform to dimensions as shown in the plans. The minimum area of each reflecting surface shall be 1.44 sq.in.
Use non-cast iron snowplowable pavement markers that are on the NCDOT Approved Products List.
The surface of the housing shall be free of scale, dirt, rust, oil, grease or any other contaminant which might reduce its bond to the epoxy adhesive.
Mark the housing with the manufacturer's name and model number of marker.
Laminate the reflector to an elastomeric pad and attach with adhesive to the housing. The thickness of the elastomeric pad shall be 0.04 inch.
All pavement marker reflective lenses shall be in close conformance with the AMS - STD -595 colors as listed below when viewed during night situations. Crystal: Color No. 17886 (Whi te) Yellow: Color No. 13538 Red: Color No. 11302
Define “horizontal entrance angle” as the angle in the horizontal plane between the direction of incident light and the normal to the leading edge of the marker. Define “observation angle” as the angle, at the reflector, between observer's line of sight and the direction of the light incident on the reflector. Define “specific intensity (S.I.)” as candlepower of the returned light at the chosen observation and entrance angles for each footcandle of illumination at the reflector. S.I. = ()ILDD RL ××× Where: