ITEM 643 POLYESTER PAVEMENT MARKING
643.01 Description. This work consists of furnishing and applying polyester pavement markings
according to Item 641, 740.01, 740.03, 740.09, and the additional requirements specified below.
643.02 Materials. Furnish materials conforming to:
Polyester Pavement Marking ........... 740.03 Glass Beads, Type B ........................ 740.09 The Engineer may obtain random samples from the application equipment in accordance with Supplement 1089 . Furnish the manufacturer’s identification information for the sampled liquid materials. The Department will test the quality assurance sample for conformance to the manufacturer’s production ranges. Samples not meeting the manufacturer’s production range s will require the Contractor to re-apply, at his expense, any markings using that sample. All other untested batches will become not approved materials and will either require testing or re-application. Do not apply material that have exceeded the manufacturer’s shelf life. Do not use glass beads that are wet.
643.03 Equipment. Use application equipment capable of mixing the polyester components in
proportions recommended by the manufacturer and applying glass beads at the time of marking placement. Use equipment (striper) capable of applying polyester long-lines at the thickness specified for solid and broken lines while moving on the highway at a speed of not less than 7 miles per hour (11 km/h). Furnish a calibrated measuring device acceptable to the Engineer to measure the polyester resin in the striper tanks. Equip all striping equipment for center line, lane line and edge line markings with a computerized Data Logging System (DLS) conforming to 641.04 when the length of marking exceeds 0.5 miles (0.8 km) of continuous line equivalent. The DLS shall measure the polyester resin material component and glass beads only. Catalyst will be calculated as 2 percent of the resin used. Furnish written documentation to the Engineer for the equipment’s operational capabilities from the equipment manufacturer.
643.04 Application. Apply polyester only when the pavement surface is clean and dry and the
pavement and air temperature are above 50 F (10 C). If project safety requirements require marking application below 50°F (10°C), obtain approval from the Engineer and apply cold weather traffic paint, Type 1A, according to Item 642 instead of the polyester. Ensure that the polyester is thoroughly mixed at all times during application. Apply polyester (catalyst plus resin) uniformly to the pavement at the following rates: 15 Mil Thickness Line Width (inch) 4 6 8 12 24 Gallon per Mile of Line Solid Line 16 24 32 48 96 Broken Line 4 6 8 12 24 Dotted Line 4 6 8 12 24 Areas, Symbols, Words 0.94 gallon per 100 square feet 0.38 mm Thickness Line Width (mm) 100 150 200 300 600 Liter per Kilometer of Line Solid Line 37 56 74 111 222 Broken Line 9.3 14 18.6 28 56 Dotted Line 9.3 14 18.6 28 56 Areas, Symbols, Words 0.38 L/m² Do not dilute the material. Apply glass beads to the uncured polyester in sufficient quantity so that the beads completely fill the polyester film from the film -pavement interface to the top surface of the film to the extent that there are loose beads on the surface of the uncured line. Apply glass beads at a minimum rate of 16.5 pounds per 100 square feet (8 kg per 10 m 2) of polyester applied in a manner that provides uniformly retroreflective lines. If the applied polyester becomes tacky and causes marking discoloration and darkening, cease marking application until the Engineer agrees that the problem is corrected. If any marking is in a tracking condition 45 minutes after application, cease marking application until the Engineer agrees that the problem is corrected. Do not apply polyester pavement markings to new asphalt concrete until at least 2 weeks after the pavement is placed. Assure curing compound is removed from portland cement concrete pavements. Replace unsatisfactory markings according to 641.11. Furnish the Engineer daily DLS reports according to 641.04.
643.05 Basis of Payment. The Department will pay for accepted quantities at the contract prices,
or prices adjusted according to 641.11, measured according to 641.12, with the provisions specified in 641.13, and as follows: Item Unit Description 643 Mile (Kilometer) Edge Line, ___ inch (___ mm) 643 Mile (Kilometer) Lane Line, ___ inch (___ mm) 643 Mile (Kilometer) Center Line 643 Foot (Meter) Channelizing Line, ___ inch (___ mm) 643 Foot (Meter) Stop Line 643 Foot (Meter) Yield Line 643 Foot (Meter) Crosswalk Line 643 Foot (Meter) Transverse/Diagonal Line 643 Foot (Meter) Curb Marking 643 Square Foot Island Marking (Square Meter) 643 Each Handicap Symbol Marking 643 Each Railroad Symbol Marking 643 Each School Symbol Marking, ___ inch (___ mm) 643 Each Bicycle Lane Symbol Marking 643 Each Shared Lane Marking 643 Foot (Meter) Parking Lot Stall Marking 643 Each Lane Arrow 643 Each Two Way Left Turn Arrow 643 Each Word on Pavement, ___ inch (___ mm) 643 Foot (Meter) Dotted Line, ___ inch (___ mm) 643 Foot or Square Foot Removal of Pavement Marking (Meter or Square Meter), or Each 643 Lump Sum Two-Way Radio Equipment
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