Item 647 HEAT-FUSED PREFORMED THERMOPLASTIC PAVEMENT MARKING
647.01 Description
647.02 Materials
647.03 Equipment
647.04 Application
647.05 Basis of Payment
647.01 Description. This work consists of
furnishing and applying heat-fused preformed thermoplastic for use as auxiliary
pavement markings according to Item 641, 740.01, 740.08
and the additional requirements specified below.
647.02 Materials. Furnish materials conforming to:
Heat fused preformed
thermoplastic pavement marking material.................................. 740.08
647.03 Equipment. Use manufacturer
recommended equipment to apply the heat-fused preformed thermoplastic pavement marking material according to the
appropriate type, as follows:
A. Type A90 or Type A125
Material.
1.
Propane torch to heat the pavement and material according to 647.04.B.
2.
Infrared thermometer to assure that both the pavement and the material are
properly heated and do not exceed the manufacturer’s specified application
temperature.
B. Type B90 or Type B125
Material.
1.
Propane torch for ensuring no moisture is present on the pavement and heating
the material according to 647.04.C.
2.
A thermometer is not required.
A. General. Apply the heat-fused preformed thermoplastic
pavement marking material to clean, dry pavement surfaces according to the
appropriate type unless otherwise directed by the manufacturer's
recommendation. Apply primer sealer on portland cement concrete pavements for proper
adhesion only if the manufacturer requires its use.
Form lines 12 inches
(300 mm) wide or less by one piece; form lines wider than 12 inches (300 mm) by
no more than two pieces. Do not overlap individual pieces. Do not
allow a gap greater than 1/4-inch (6 mm) between pieces.
B. Type A90 and Type A125 Material
Application on Asphalt Concrete and Portland Cement
Concrete Pavements. Uniformly
pre-heat the pavement to 300 °F (149 °C) with a propane torch. Place the
material on the warm surface as soon as practical, then uniformly post-heat to
400 °F (204 °C). Begin the post-heating process of material application
as quickly as possible. The Contractor may have to extend post-heating on
concrete having a high moisture content. Allow
the material to cool naturally and solidify before exposing it to traffic.
Type A90 and A125
materials shall contain intermix beads throughout. Drop-on glass beads
are not required unless using a non-surface beaded marking (i.e., for turn or
combination arrows).
C. Type B90 and Type B125 Material
Application on Asphalt Concrete and Portland Cement
Concrete Pavements. Heat the
pavement only to ensure no moisture is present. Place the material
on the dry surface and then uniformly heat the material until it bubbles and changes color to off-white. Material must be
able to be applied with no preheating of the pavement to a
specified temperature and without the use of a thermometer. Allow the
material to cool naturally and solidify before exposing it to traffic.
Type B90 and B125
material shall contain intermix glass beads throughout. Drop-on glass beads
are not required unless using a non-surface beaded marking (i.e., for turn or
combination arrows).
647.05 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
647
Foot
(Meter)
Channelizing Line, ____ inch (_____ mm), Type ___
647
Foot
(Meter)
Stop Line, Type ___
647
Foot
(Meter)
Yield Line, Type____
647
Foot
(Meter)
Crosswalk Line, Type ___
647
Foot
(Meter)
Transverse/Diagonal Line, Type ____
647
Each
Handicap Symbol Marking, Type ___
647
Each
Railroad Symbol Marking, Type ___
647
Each
School Symbol Marking, ___ inch (___ mm), Type ___
647
Each
Bicycle Lane Symbol Marking, Type____
647
Each
Shared Lane Marking
647
Foot
(Meter)
Parking Lot Stall Marking, Type ___
647
Each
Lane Arrow, Type ___
647
Each
Word on a Pavement,
___ inch (___ mm), Type ___
647
Foot
(Meter)
Dotted Line, ___ inch (___ mm), Type ___
647
Each,
Foot,
Removal of Pavement Marking
Square Foot
(Meter,
Square Meter)