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|  MIL-T-62531(AT)
APPENDIX A
Verification Lessons Learned
3.16 Transportability. Vehicle shall be equipped with towing device and lifting and tiedown
provisions which shall be adequate for highway, rail, sea and air transport in accordance with
MIL-STD-209 and MIL-A-8421.
Rationale
MIL-STD-209 establishes dimensional limits, design considerations, and positioning
requirements for slinging and tiedown provisions for lifting and tying down vehicles and military
equipment. MIL-A-8421 establishes the general design and performance requirements of
military equipment for air transportability on fixed wing Air Force aircraft.
3.16.1 Lifting eyes. Two lifting eyes shall be installed on the front and two on the rear of
the vehicle. Each lifting eye and its mounting shall withstand a load of at least ______ kg
without failure or permanent deformation when the load is applied at an angle up to
_____ degrees from the longitudinal axis.
Rationale
Insert the minimum load capacity of each lifting eye in the first blank space and the
maximum angle in the second space. Military vehicles are generally transported from their place
of manufacturer to the place where they will be used, rather than being driven under their own
power. In the course of this transport, it is often necessary to lift or hoist the vehicles abroad
various carriers by means of cranes or similar equipment. To facilitate these hoisting operations
and to minimize the risk of damage to the vehicles, suitable lifting eyes (slinging eyes) must be
provided as an integral part of each vehicle. These may be in the form of lugs or pad eyes, and
may include a shackle or a ring as an integral part. Their function is to provide a means of
attaching a hook, sling eye, or shackle to the vehicle to permit safe lifting.
Guidance
Good design practice is to provide a minimum of four points for lifting on all vehicles. In
order to minimize the total number of attachment eyes on a vehicle, the locations and designs of
lifting eyes, eyes for tying down the vehicle, and towing lugs should be coordinated for
multipurpose use wherever this is practicable. Lugs and eyes must be located for maximum
accessibility to them. The working load upon which the designs of all lugs and eyes should be
based is the maximum resultant static load imposed on the eye under the service conditions
90
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