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

these same slings attached to a 20-foot ISO container spreader bar.  If there is sling interference with the equipment, the contact points on the equipment must have sufficient strength to withstand the compressive loads caused by sling contact at the design limit load.

b.  An HSL design limit load of not less than the lift point LF, calculated from appendix A procedures, times the static load.  The static load is determined by a static lift test(s) or by mathematical analysis, based on the item's GW and a specified rigging

configuration provided by the U.S. Army Soldier Systems Center .  If the GW of the item of equipment exceeds the helicopter's lift capability, but can be reduced in weight to fall within the helicopter's lift capability, the GW used to determine the static load and

design limit load will be based on the helicopter's maximum lift capability.   If there is sling interference with the equipment, the contact points on the equipment must have sufficient strength to withstand the compressive loads caused by sling contact at the design limit load.

loads.

c.  An ultimate load of not less than 1.5 times the crane lift and HSL design limit

d.  The lifting provisions shall be tested for validation in accordance with paragraph 5.1.5 of this standard.

e.  Equipment with a HSL requirement shall also meet the requirements of MIL- STD-913.

f.  Items requiring sling load at speeds exceeding 130 knots require higher strength lifting provisions.  The V-22 is the first aircraft capable of these higher speeds. Testing is onging, but preliminary analysis has indicated that the provision strength required may be four times the static load.  Lifting provisions on equipment that is being designed for HSL by the V-22 must be designed with these higher strength

requirements in mind.   Contact the Navy/Marine Corps point of contact listed in the forward of this standard for additional information.

5.1.3.2  For equipment with only a crane lift requirement.

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

a.  A 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 item of 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 these same slings

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