event of electrical or mechanical failure. A disconnect system for the
gate drive shall be provided to allow manual operation of the barrier in
the event of a power outage.
2.3.1.2
Hydraulic Power Unit
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NOTE: Retain and edit or delete paragraph based on
type of operator chosen. Coordinate with PART 2
PRODUCTS.
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The hydraulic power unit shall contain synthetic biodegradable hydraulic
fluid which maintains its viscosity within its 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. 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.
2.3.1.3
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 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.
2.3.2
Manual Crash Gate
The manual crash gate shall be capable of being hinged from either side.
Hinge points of both buttresses shall each contain a locking pin with
padlock acceptance for securing the crash gate in the closed position. The
crash gate shall withstand a [4535 kg 10,000 pound vehicle at impact speed
of 80 km/hour, 50 mph, with maximum gate deflection or vehicle penetration
of 3 m 10 feet] [6804 kg 15,000 pound vehicle traveling at impact speed of
[48] [64][80] km/hour [30] [40] [50] mph, with a maximum gate deflection or
vehicle penetration of up to 1 m 3 feet].
2.4
CRASH BEAM
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NOTE: Edit the paragraph for the crash barrier
requirements. Department of State impact condition
of a 6804 kg (15,000 pound) vehicle traveling at 48
SECTION 02840
Page 15
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