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

rear ends of the equipment.

g. Each equipment tiedown provision shall be used for restraint in only one longitudinal direction, either fore or aft, and only one lateral direction, either left or right.

h. Equipment that is normally attached to other equipment during transport (i.e. prime movers and trailers) shall have provisions that are located such that they are usable and meet the requirements of Figure 7 when coupled to another vehicle.

5.2.3 Strength.

Each equipment tiedown provision, including the connection to the structural frame, shall withstand its proportionate share of the loadings shown in Table I (see MIL-STD-

1366, Interface Standard for Transportability Criteria for load requirements applicable for internal transport on helicopters smaller than the CH-47). Since the design limit load in the fore and aft direction is the largest, the principal direction of restraint for equipment tiedown provisions shall be in this direction. These loads shall be applied statically and independently. The directional load (design limit load in each direction) shall be distributed among the equipment tiedown provisions that would effectively resist motion along that axis. Distribution of the load among the equipment tiedown provisions shall

Table I - Load Requirements for Equipment Tiedown Provisions (transport by highway, rail, marine, USAF fixed-wing aircraft, and internally by CH-47 helicopter) and

Large Cargo Tiedown Provisions.

Design limit load

Direction of load

4.O times Gross

Weight 1, 2, 3, 4

Fore and Aft (Longitudinal axis of equipment)

2.O times Gross

Weight 2

Downward (Vertical axis of equipment)

1.5 times Gross

Weight

Left and Right (Lateral axis of equipment)

1. The design limit load in the fore and aft direction for equipment tiedown

provisions on helicopters is 3.O times the gross weight of the helicopter. Helicopters are not transported by rail and the 4g requirement in the longitudinal direction is primarily seen in the rail transport mode.

2. If the equipment can be oriented on a railcar or a USAF fixed-wing aircraft in two directions, then the equipment tiedown provisions must meet the design limit loads for both orientations.

3. For transport on KC-1O aircraft in front of the barrier net, or with no barrier net, the design limit load in the forward direction is 9 times the gross weight.

4. For transport on KC-135 aircraft with passengers forward or alongside of the cargo, the design limit load in the forward direction is 8 times the gross weight.

Source: https://assist.dla.mil -- D1o4wnloaded: 2014-09-28T23:10Z Check the source to verify that this is the current version before use.