MIL-STD-209 Lifting And Tiedown ProvisionsThis standard establishes dimensional limits, design considerations, positioning requirements, and strength requirements for lifting to include helicopter sling load HSL and tiedown provisions for lifting or tying down tanks and other tracked vehicles, tactical wheeled vehicles, helicopters, and other military equipment shipped assembled or disassembled in unboxed or uncrated condition, and for restraining cargo or accessories to such equipment. The lifting and tiedown requirements in this standard are necessary to permit compatibility between military equipment and the transportation systems used for deployments.

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MIL-STD-209K

e.  Orientation of the provision shall be such that an attaching device (hook or shackle), of the proper capacity, does not contact any part of the item being lifted except the provision.  This ensures interoperability between the equipment and the transportation systems.

f.  Height of provisions shall be between 2 and 6 feet, measured from the ground when the equipment is resting on a level surface, unless an integral means for reaching the provisions is provided.

g.  Dynamic stability is required during crane lifting and helicopter sling loading. When possible, lifting provisions should be located above the vertical center of gravity (CG).  If this is not possible, lifting provisions shall be located so that a line connecting adjacent lifting provisions is located outside a 120° cone having its apex at the CG and its axis of rotation about the vertical axis (Figure 5).

h.  When lifting with equal length slings, it is preferable that the resulting angle of lift be as close to level as possible.  In most lifting situations, altering sling length to achieve a level lift is NOT an option, so the equipment shall be capable of being lifted at the resulting angle when using equal length slings.

i.  When suspended, the overall height of the equipment and attached minimum length single apex sling assembly shall not exceed a height of 24 feet above the lowest extremity of the equipment (Figure 6).

5.1.3  Strength.

Equipment with a HSL requirement shall meet the strength requirements of paragraph 5.1.3.1.  All other equipment shall meet the strength requirements of paragraph 5.1.3.2.

5.1.3.1  For equipment with a helicopter/tiltrotor sling load requirement and a crane lift requirement.

Each lifting provision, including the connecting structure, shall meet the following requirements:

a.  A crane lift design limit load of not less than 2.3 times the static load.  The static load is determined by static lift test or by mathematical analysis, using the item's GW and the minimum sling length for an equal length single apex sling assembly (as defined by paragraph 5.1.2.a).  A  sample problem showing how to determine the required strength of the lifting provisions and sling lengths is in appendix B.  The

provision and connecting structural members must withstand the design limit load when the equipment is lifted by slings ranging from the minimum length for an equal length single apex sling assembly, and if the equipment weighs 67,200 pounds or less, to

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