MIL-PRF-29250C
and all 25K-loaders. The ILJS shall include a towing assembly which will allow mobility and
maneuverability for loading/off loading and positioning the ILJS/container combination. The ILJS
shall be designed to meet all requirements as defined herein.
3.2 First article. When specified (see 6.2), a sample loading jack system shall be subjected to first
article inspection in accordance with 4.1.1.
3.3 Materials. Materials used shall be free from defects which would adversely affect the
performance or maintainability of individual components or of the overall assembly. Materials not
specified herein shall be of the same quality used for the intended purpose in commercial practice.
Unless otherwise specified herein, all equipment, material, and articles incorporated in the work
covered by this specification are to be new and fabricated using materials produced from
recovered materials to the maximum extent possible without jeopardizing the intended use. The
term "recovered materials" means materials which have been collected or recovered from solid
waste and reprocessed to become a source of raw materials, as opposed to virgin raw materials.
Unless otherwise specified, none of the above shall be interpreted to mean that the use of used or
rebuilt materials is allowed under this specification.
3.4 Design. The ILJS structure and all of its components shall be designed to a safety factor of
not less than 2.5 based on the material yield stress, applied to the ILJS rated load of 25,000 lb
(11 340 kilograms (kg)).
3.5 Construction.
3.5.1 Attachment points. The ILJS attachment points shall be restricted to the container side and
end wall apertures of the ISO corner fittings (ISO 1161), located at the top and bottom of the
container. The ILJS shall be capable of being attached and removed while the four bottom ISO
corners of the containers are sitting on the ground.
3.5.2 Corner jack assemblies. Four corner jack assemblies shall be provided. Each corner jack
assembly shall connect to the ISO container at the top and bottom corner fittings. Each corner
jack assembly shall be capable of being attached to any of the top and bottom corner fittings.
Each corner jack assembly shall be mounted on a two-wheel pneumatic-tired caster assembly.
When tested, each corner jack shall withstand a static load of 20,000 lb (9 072 kg) without
showing signs of deterioration or permanent deformation. The jacks shall be marked at one-inch
(25 mm) increments; each sixth increment shall be highlighted and numbered.
3.5.3 Assembly components. All assembly components of the ILJS shall be identical to like
components to ensure interchangeability of component parts of the ILJS. Assembly components
shall meet the weight requirements specified in 3.7.
3.5.4 Caster assembly. Each caster assembly shall caster in 360-degree rotation in any direction
(fully articulating). The caster assembly shall not have any side-to-side tilting capability. A
mechanism shall be provided to lock the caster assembly at 90-degree positions in line with
container side walls and ends.
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