MIL-PRF-46756E(AT)
3. REQUIREMENTS
3.1 First article. When specified (see 6.2), a sample shall be subjected to first article
inspection in accordance with 4.2.
3.2 Materials. Materials used shall be in accordance with the manufacturer's materials
specifications for semitrailers. The materials shall be capable of meeting all of the operational and
environmental requirements specified herein. Recovered materials shall be used to the maximum
extent practicable. Asbestos, cadmium, and radioactive material shall not be used in this item.
Radioactive material is defined by CFR, Title 10, Parts 30 and 40, and other radioactive material
in which the specific activity is greater than 0.002 microcuries per gram or the activity per item
equals or exceeds 0.01 microcuries (see 4.6.1).
3.3 Ozone resistant. Rubber components controlled by detail specifications shall be
ozone resistant only when required by the specification referenced on the drawing.
3.4 Construction. The semitrailer shall be constructed in accordance with the drawings
and specifications applicable to the specific vehicle on contract. If more than one unit of a
particular component is used in or on the semitrailer, the components used shall be identical in
make, material, and quality. The riveting, welding practices and quality shall be the same on each
semitrailer (see 4.6.1 and 4.6.2).
3.4.1 Spare wheel assembly. One spare wheel, tire, and tube assembly shall be furnished
with each semitrailer (see 4.6.3).
3.4.1.1 Tires. Unless otherwise specified (see 6.2), tires shall be cross-country in
accordance with the Tire and Rim Association.
3.4.1.2 Inner tubes. Unless otherwise specified (see 6.2), inner tubes shall be of the heavy
duty type and shall be of proper size for tires furnished. Tube type radial tires shall have radial
type inner tubes. Tire flaps shall be provided for tube type tires in accordance with the Tire and
Rim Association recommendations.
3.4.2 Electrical system. Electrical system shall be 24 volts direct current (dc) (nominal)
(see 4.6.4).
3.4.2.1 Lighting system. The internal and external lighting systems as specified on
applicable drawings, shall operate on voltage between 18 and 30 volts under all semitrailer
operating conditions (see 4.6.4).
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