MIL-C-53057(ME)
3.1.4 Crane structure. The structure of the crane shall be such
that stresses induced during required operations do not exceed the
allowable strength margins of SAE J1063.
3.2 First article. When specified (see 6.2), 4 or more cranes shall
be subjected to first article tests and inspection as specified in
section 4. Any changes or deviations of cranes from the approved
first article during production will be subject to the approval of
the contracting officer. Approval of the first article will not
relieve the contractor of his obligation to furnish cranes conforming
to this specification.
3.3 Material. Material shall be as specified herein. Materials not
specified shall be selected by the contractor and shall be subject to
all provisions of this specification. It is encouraged that recovered
material be used when practical as long as it meets the requirements
of this specification (see 6.8.7).
3.3.1 Dissimilar metals. Dissimilar metals shall not be used in
intimate contact with each other unless suitably protected against
electrolytic corrosion. Dissimilar metals and methods of protecting
them are defined and described in MIL STD-889.
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3.3.1.1 Material deterioration and control The crane shall be
.
fabricated from compatible materials, inherently corrosion resistant
or treated to provide protection against the various forms of
corrosion and deterioration that may affect the normal performance of
the crane or during storage of the crane when stored in accordance
with proper storage procedures for the type of storage involved.
3.3.1.2 Drain holes. Drain holes shall be provided where
applicable, to prevent collection or entrapment of water or other
unwanted fluids.
3.3.2 Screw threads. Screw threads shall be in accordance with
FED-STD-H28.
3.3.3 Tire age. Tires shall not exceed 8 calendar quarters in age
from date of cure of the rubber to date of acceptance oŁ the crane by
the Government.
3.3.4 Recovered materials. For the purpose of this requirement,
recovered materials are those materials which have been collected
from solid waste and reprocessed to become a source of raw materials,
as distinguished from virgin raw materials. The components, pieces
and parts incorporated in the crane may be newly fabricated from
recovered materials to the maximum extent practicable, provided the
crane produced meets all other requirements of this specification.
Used, rebuilt or remanufactured components, pieces and parts shall
not be incorporated in the crane.
3.4 Environmental and use requirements
.
3.4.1 Operating conditions. The crane shall withstand the usage
encountered in military operations without damage, permanent
deformation or failure of components. The military operations include
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