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

along the perimeter of the cargo area.  The spacing between provisions may be adjusted as necessary to avoid interference with vehicle structural members. Provisions on the side and end walls of the cargo area shall be as close to the floor of the cargo area as practical.  The center of the cargo tiedowns that are nearest to the corners of the cargo area shall not be more than 6 inches from the corner of the cargo

area.  If the cargo area is equipped with ISO corner fittings in addition to cargo tiedown provisions, the corner cargo tiedowns shall be located as close as possible to these fittings.

5.4.3  Strength.

All cargo tiedown provisions shall meet the strength requirements of Table II.

5.4.3.1  Ultimate design load.

The ultimate load each cargo tiedown provision can withstand shall not be less than 1.5 times the design limit load determined in paragraph 5.4.3.

5.4.3.1  Transport on Navy/Marine Corps aircraft.

Internal transport on Navy/Marine Corps aircraft require restraint above that

required for other modes of transport.  See appendix D for further guidance in designing for restraint aboard these transportation assets.

5.4.4  Provision Dimensions.

For cargo areas with a payload capacity less than or equal to 15,000 pounds, the provisions shall have an opening such that a 1-inch radius semi-circle can be inscribed in it and the thickness of the provision shall not be greater than three-fourths of an inch. For cargo areas with a payload capacity greater than 15,000 pounds, the cargo tiedown

provisions shall have an opening not less than 2 inches in diameter and the thickness of the provision shall not be greater than 1 inch.  Additionally, the cargo tiedown provisions shall be capable of accepting 2" x .065" steel banding without causing tearing of the banding.  Examples of acceptable cargo tiedown provisions is shown in Figure 10.

5.4.5  Testing.

Testing shall meet the following requirements:

a.  A static pull to the required design limit load shall be conducted on a selected sample of cargo tiedown provisions.  Selection of provisions for testing will be based on differences in provision design and mounting location.

b.  Loads applied to each provision shall be measured with a measuring device, such as a load cell or dynamometer.

c.  The points used to apply the load to the equipment shall be located so they do not interfere with or reduce the loading on the structural member next to the cargo tiedown provision.

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