3.2.2
Dissimilar Metals Protection
Insulate control surfaces by electrolytically inactive materials.
3.2.3
Finish Coat Color
Brilliant yellow and black. Paint 75 mm 3 inch wide black and yellow
diagonal stripes on all vertical surfaces of pit, skirts, and platform
edges exposed above adjacent surfaces at any ramp position. Paint similar
stripes on top of ramp surfaces in 150 mm 6 inch wide band around outside
edges (except for fixed edge).
3.3
FIELD TESTS
The Contractor is fully responsible to provide personnel, instruments,
materials, and equipment including test vehicles, for the administration
and direction of the tests. Correct defects and repeat tests under the
cognizance of the Contracting Officer and the dock leveler manufacturer.
The Contracting Officer will certify the test load.
3.3.1
Roll-Over Load Tests
Move roll-over load of 9070 kg 20,000 pounds over the dock leveler between
the bed of a freight carrier and the building loading dock surface for 10
cycles. With the ramp extension retracted and the ramp platform leveled
with the building loading dock surface, run a 9070 kg 20,000 pound
roll-over load over the ramp in various directions for 20 cycles. No
permanent deformation [or hydraulic system leakage] shall occur subsequent
to examination after these roll-over tests.
3.3.2
Drop Tests
Twice, drop test the dock leveler at the indicated rated capacity as
follows: With the load on the platform and the lip resting on a vehicle
carrier bed not less than 250 mm 10 inches above loading dock surface, pull
the carrier or pull away from the lip, leaving the loading ramp
unsupported. Do not exceed 100 mm 4 inch for the measured vertical drop of
the dock leveler taken at the point where the lip rests on the vehicle
carrier during each of the drop tests. Inspect the loading ramp after each
drop and ensure no damage or distortion to the mechanical, [electrical] or
structural components. [There shall be no leakage from the hydraulic
system.]
3.3.3
Acceptance Tests
Perform an acceptance test in the presence of the dock leveler manufacturer
and the Contracting Officer subsequent to roll-over load tests and drop
tests. Conduct operation of the equipment through all of its motions and
specified checks as follows: (a) extend lip to rest on a variety of
freight carriers with beds up 300 mm 12 inch above and below dock level;
(b) test 100 mm 4 inch drop limitation with 3175 kg 7000 pound load on
ramp, evenly distributed; (c) test level compensation with the ramp, loaded
with a minimum of 3175 kg 7000 pounds; and (d) test proper compensation
(float) for various compression of countersprings, with ramp loaded and
unloaded.
3.4
INSTRUCTION TO GOVERNMENT PERSONNEL
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SECTION 11161
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