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

5.  DETAILED REQUIREMENTS

5.1  Lifting provisions.

5.1.1  Number.

Equipment shall have four lifting provisions to ensure interoperability between transported military equipment and lifting devices commonly used in the transportation environment.  Lifting sling sets and ISO container spreader bars available at ports are typically equipped with four locations for lifting.  If equipment is sectionalized for shipping, this requirement applies to each section and to the equipment when assembled.  For type II equipment, the equipment shall have four selected points that can be used for lifting by attaching hooks or shackles.

5.1.2  Location.

Lifting provisions shall be located such that:

a.  The equipment can be lifted using an equal length single apex sling assembly, as defined in this paragraph, without incurring damage to the equipment or the slings. The minimum length of sling leg used for lifting with an equal length single apex sling assembly is determined by setting each sling angle to 45° (referenced from the plane of the provisions).  The point in space where the four equal length slings intersect determines the minimum length of the single apex sling assembly.  If the length determined by this method is less than 12 feet, the sling length shall be set to 12 feet. This is done because the sling sets typically available for lifting are 12 feet long, or longer.  The minimum sling length shall be used for testing (see 5.1.5).  Appendix B gives an example of how to determine the minimum sling length and the required loads for testing.

b.  Not less than 1 inch of clearance should be maintained between the equipment and the sling cables, chains, or the rope portion of helicopter slings.  The 1- inch clearance requirement applies when the equipment is lifted with the minimum equal length sling legs (see 5.1.2.a), with sling angles ranging from a 45° single apex sling assembly (this angle will be more than 45° if the spacing of the provisions dictates the use of 12 foot slings (see 5.1.2.a), and if the weight of the equipment is 67,200 pounds or less, to those same sling legs attached to a 20-foot ISO container spreader bar (Figure 4)).   When a sling leg must contact a part of the equipment, testing or computer aided engineering structural analysis must demonstrate that the affected part(s) has sufficient strength to withstand the force exerted by the sling leg to prevent

permanent deformation of any part of the equipment, and that contact will not adversely affect the material of the sling device.

c.  Provisions do not interfere with the functioning of the equipment. d.  Maximum accessibility to the provision is maintained.

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