at constant heaviest use rate. If ambient
temperature range requires the oil to be changed,
the manufacturer must supply information on type of
oil to be used and instructions for changing. Fill
in the high and low air temperature of the area
where the barrier will be installed.
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The hydraulic power unit shall contain synthetic biodegradable hydraulic
fluid which maintains its viscosity operating range, even at constant
heaviest use rate, for an ambient temperature range of [minus 7 to plus 66
degrees C 20 to 150 degrees F] [[_____] to [_____]]. A hydraulic fluid
heater shall be provided so that the viscosity remains within its operating
range if ambient temperatures below minus 7 degrees C 20 degrees F are
expected. Buried hydraulic lines for the connection of the hydraulic power
unit to the barrier shall be flexible or carbon steel pipe, or a
combination of flexible and carbon steel pipe. Flexible and rigid
hydraulic line working pressures shall exceed the maximum system relief
pressure. [PVC pipe and fittings for burial of hydraulic lines shall be in
accordance with ASTM D 3034 Type PS 46 with minimum pipe stiffness of 46.]
a.
Flexible hydraulic lines shall be in accordance with SAE J517.
b.
Rigid hydraulic lines shall be seamless carbon steel pipe in
accordance with ASTM A 106/A 106M.
2.1.1.5
Hydraulic Power Unit Enclosure
A NEMA Type 3R enclosure as specified in NEMA 250 shall be provided to
enclose the hydraulic power unit. The enclosure shall be designed for easy
removal of the hydraulic power unit and other accessories without complete
removal of the enclosure. An access door with hinges and an inside and
outside operable/lockable (exterior) door latch shall be provided.
Equipment within the enclosure shall be placed and configured so that all
periodic maintenance can be performed through the access door without
removal of the equipment. The enclosure shall be equipped with
weatherproof louver vents appropriately sized and located to dissipate
internal heat generation.
2.1.2
Manual Retractable Barriers
The manual barrier shall be capable of being raised and lowered by manual
means such as levers or hydraulics requiring a maximum 267 N (60 pounds) 60
pounds of force. The manual mechanism shall contain a locking pin which
accepts a padlock for securing the barrier when it is in the "UP" position.
Retractable barrier shall withstand a [_____] kg pound vehicle at impact
speed of [_____] km/hour, mph, with maximum barrier deflection or vehicle
penetration of [_____] m feet. Barrier should be capable of being locked in
the down position.
2.2
RETRACTABLE BOLLARDS
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NOTE: Coordinate with paragraph GENERAL
REQUIREMENTS and paragraph RETRACTABLE BARRIERS.
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The total bollard height when in the raised position shall be no less than
750 mm 30 inches above the roadway surface and shall have an outside
SECTION 02840
Page 12
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