OO-C-2764
3.10.1 Lifting capacity. The crane shall have rated lifting capacities of
not less than the load or loads specified (see 6.2), at the radius or radii
specified (see 6.2), with the boom length or lengths specified (see 6.2), with
bucket size and type as specified (see 6.2), when tested in accordance with
4.4.5.
3.10.2 Opera tional requirements. The crane shall be capable of starting and
maintaining constant performance characteristics as specified herein under any
of the following conditions or combination of conditions:
a. Temperature conditioning. In any stabilized temperature from
+120 deg Fahrenheit (F) to -20 deg F', except as specified in 3.10.2(b).
b. Elevation conditions. At any elevation from sea level (barometric
pressure 29.92 inches mercury), and a maximum stabilized temperature of
120 deg F to 3,000 feet elevation and a temperature of 107 deg F without
adding turbocharger.
Documentation from the engine manufacturer stating that the engine will meet
these requirements will be satisfactory with approval of the contracting
officer.
3.10.3 Operating characteristics. All operational functions for crane shall
operate independently and simultaneously for maximum performance. These
functions include hoisting, swinging, and booming. When specified (see 6.2) the
crane shall have independent crawler traction.
3.10.3.1 Maneuverability. The crane shall be capable of traveling in a
forward or backward direction, with the revolving superstructure in any
position, and capable of being steered either to the right to left with controls
from the operator's position. The completely equipped crane shall be capable of
ascending or descending a 30 percent grade on smooth, firm, dry ground with the
applicable front-end attachment located either to the front or back of the
crane. Ground clearance shall be not less than 9-1/2 inches, exclusive of the
drive chains.
3.10.3.2 Ground bearing pressure. The ground bearing pressure shall be not
greater than 11 pounds-force per square inch (psi) for size 1 crone; not greater
than 15 psi for all other sizes. Ground bearing pressure shall be determined in
accordance with 4.4.2.
3.10.4 Engine power and speed ratings. The maximum governed speed shall be
between 110 and 175 percent of the peak torque speed. Torque converter or
fluid-coupling equipped engine shall have a maximum governed speed appropriate
for the torque converter used, but not more than 2,600 revolutions per minute
(rpm). Engines including accessories, shall be capable of developing
intermittent brake horsepower (hp) of not less than 130 percent of the drum
power required to meet all operating requirements specified herein, at full load
governed speed at an elevation up to 3,000 feet.
3.10.5 Crane load stability. Crane stability under loads shall be in
accordance with SAE J765. Load rating chart shall be not more than 75 percent
of the stability established.
3.10.6 Stress requirements.
Design of the completely assembled crane shall
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