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

minimum of 90° from the vertical towards the center of the cargo area and be functional at least 45° to either side of the vertical.  For side-mounted provisions, the required movement will be in the fore and aft directions, and for end-mounted provisions, the required movement will be towards the left or right side of the equipment (Figure 11).

5.4.7.  Unique cargo tiedown provisions.

Special cargo tiedown provisions used to meet unique applications may be included in the system specification.  The suitability of these provisions must be established and verified by testing that demonstrates the ability of the provision to provide adequate restraint for the unique application.   At a minimum, this testing will verify the strength and directional capabilities of these unique provisions.  Rail impact testing in accordance with MIL-STD-810 may be required to ensure that the these unique cargo tiedown provisions provide adequate restraint during the dynamic loads encountered in various modes of transport.

5.5    Large Cargo Tiedown Provisions.

Large Cargo tiedown provisions are required on all equipment with cargo areas that have a maximum payload capability greater than 5,000 pounds.

5.5.1  Number.

The front and rear edges of the cargo area shall be equipped with large cargo tiedown provisions, either two or four provisions along each edge.  For cargo areas 40 feet or longer, additional cargo tiedown provisions are required across the cargo area at the longitudinal midpoint of the cargo area (see Figure 12).   These additional provisions may be grouped in two rows laterally across the cargo area on either side of the longitudinal midpoint as long as the center of the provisions are not more than 12

inches from the longitudinal midpoint (see Figure 12).  Each row can consist of either two or four provisions each.

5.5.2   Location.

Large cargo tiedown provisions shall be located on the front, rear, and center (if the cargo area is 40 feet or longer) of the cargo area. If two provisions are used in each

row, then the provisions shall be equidistant from the centerline of the cargo area.  If four provisions are used in each row, the provisions shall be evenly spaced along the front, rear, or center of the  cargo area.

5.5.3   Strength.

Each large cargo tiedown provision and its supporting structure shall withstand its proportionate share of the strength requirements shown in Table I.  In this case, use the maximum payload of the cargo area as the "Gross weight" in Table I.   For cargo areas that are 40 feet or longer, it is assumed that the largest single item (other than a container) carried would only be half of the maximum payload capability of the vehicle. In this case, use half the maximum payload of the cargo area as the "Gross weight" in Table I.

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