MIL-STD-1660 Ammunition Unit LoadsThis standard establishes minimum design criteria and associated tests for ammunition unit loads.

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MIL-STD-1660A

5.5.2  Alternate material testing.  Alternate material is considered any material other than wood or metal commonly used in the manufacture of pallets, containers, or unit loads.  Alternate material test units shall be subjected to additional testing for materials which may be susceptible to damage from differing conditions during the life cycle of the test unit.

5.5.2.1  High temperature testing.  Where applicable, the alternate material test units, such as those constructed of plastics, shall be subjected to a high temperature test.  The test unit shall be pre-soaked in a chamber for 4 hours at 160 °F, then removed from the chamber and repetitive shock tested in accordance with

5.4.2.  After the repetitive shock test, the test unit shall be pre-soaked in a chamber for 4 hours at 160 °F, and then removed from the chamber and drop tested in accordance with 5.4.3.

5.5.2.2  Low temperature testing.  Where applicable, the alternate material test units, such as those constructed of plastics, shall be subjected to a low temperature test.  The test unit shall be pre-soaked in a chamber for 4 hours at -65 °F, then removed from the chamber and repetitive shock tested in accordance with

5.4.2.  After the repetitive shock test, the test unit shall be pre-soaked in a chamber for 4 hours at -65 °F, and then removed from the chamber and drop tested in accordance with 5.4.3.

5.5.2.3  Rain testing.  Where applicable, the alternate material test units, such as those constructed of cardboard, shall be subjected to a rain test.  The rain test shall be performed in accordance with Method 506.4 of MIL-STD-810.

5.5.2.4  Solar radiation testing.  Where applicable, the alternate material test units, such as those constructed of cardboard or plastic shall be subjected to a solar radiation test.  The solar radiation test shall be performed in accordance with Method 505.4 of MIL-STD-810.

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