specifically designed for placing special markings such as crosswalks,
stopbars, legends, arrows, and short lengths of lane, edge and centerlines.
The portable applicator shall be capable of applying thermoplastic
pavement markings by the extrusion method. It is intended that the
portable applicator will be loaded with hot thermoplastic composition from
the melting kettles on the mobile applicator. Equip the portable
applicator with all the necessary components, including a materials storage
reservoir, bead dispenser, extrusion shoe, and heating accessories, so as
to be capable of holding the molten thermoplastic at a temperature of 190
to 218 degrees C 375 to 425 degrees F, of extruding a line of 75 to 300 mm
3 to 12 inches in width, and in thickness of not less than 3 mm nor more
than 5 mm 0.125 inch nor more than 0.190 inch and of generally uniform
cross section.
PART 2
PRODUCTS
2.1
MATERIALS
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NOTE: Use Either FS TT-P-1952, a water-emulsion
marking paint, or High Build Acrylic Coating (HBAC)
on asphaltic pavement and pavements in areas where
air pollution by organic solvents is a problem. On
concrete pavements where air pollution by organic
solvents is not a problem, FS TT-P-1952 or FS
A-A-2886 paint may be used.
HBAC is suitable for reflective and nonreflective
use and can be applied at twice the thickness of
conventional marking paints. The paint produces
upraised markings and is appropriate for use in
marking crosswalks, stop legends, railroad
crossings, lettering, centerlines, skip lines, and
edge lines. HBAC at a thickness beyond that of
conventional marking paints is not intended for use
on pavements with snowplow use. However,
application at standard thickness is acceptable on
surfaces employing snowplows.
Use either HBAC or thermoplastic markings to reduce
maintenance costs in the desert areas, where painted
markings are susceptible to a "sandblasting" effect
during high winds.
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Provide materials conforming to the requirements specified herein.
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NOTE: For LANTNAVFACENGCOM projects only. When the
use of pavement marking materials (epoxy,
thermoplastic, and preformed) which perform better
than paint is desired for new pavement in Virginia
and North Carolina, contact LANTNAVFACENGCOM for
sample section.
When applied to pavements with high daily vehicular
traffic, High Build Acrylic Coating (HBAC) performs
SECTION 02761N
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