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

5.2.5  Testing.

Testing shall meet the following requirements:

a.  A static independent pull to the required design limit load shall be conducted on all tiedown provisions; however, all provisions do not have to be tested at the same time.

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

c.  Since testing of the provisions includes testing of the connecting structure around the provisions, the points used to restrain the equipment during testing shall be located such that  they do not interfere with or reduce the loading on the connecting structure around the provisions.

d.  Loads applied in the longitudinal, vertical, and lateral directions shall be applied statically and independently for not less than 6.0 seconds and shall be not less than the required design limit load in each direction.

e.  Failure is defined as any visible permanent deformation, yielding, or bending of the provision or other structural component.  A possible failure indication during the initial material analysis shall be justification to use more detailed analysis and testing methods (for example, calibrated measurements, finite element analysis, magnetic particle inspection, X-ray, fatigue testing, ultimate testing, and so forth).  Cracks in welds will constitute test failure.

f.  The contractor shall provide a material analysis showing the ultimate load is not less than 1.5 times the required design limit load for the provisions.

5.3   Multipurpose provisions.

Provisions meeting the requirements of both paragraph 5.1 and 5.2 can serve as multipurpose provisions.

5.4  Cargo tiedown provisions.

5.4.1  Number.

The total number of cargo tiedown provisions is determined by the size of the cargo area.  Cargo tiedown provisions are located along the front, rear, and sides of the cargo area.

5.4.2  Location.

Cargo tiedown provisions may be located along the perimeter of the cargo area so as not to increase the dimensions of the equipment, or recessed inside the walls or floor of cargo areas.  Recessed cargo provisions shall fold to provide a flush surface when

not in use.  The spacing for the provisions shall be approximately 18 inches on center

Source:  https://assist.dla.mil  --  D1o6wnloaded:  2014-09-28T23:10Z Check  the  source  to  verify  that  this  is  the  current  version  before  use.