MIL-STD-1660A APPENDIX H
(2) To further evaluate the restraint method for adequate tension and ability to maintain unit load integrity.
b. Procedure.
(1) In conducting the edgewise-drop test, the unit load may be handled with any convenient equipment, such as forklift truck, a hoist, or a block and tackle. The edgewise-drop test shall be performed on a smooth, level concrete surface or similarly unyielding surface. The unit load shall be positioned with one edge of the base supported on a sill approximately 6 inches high. The unsupported opposite edge shall then be raised and allowed to fall freely to the concrete surface from a height as determined below:
TABLE H-I. Height of edgewise drops for unit load specimens of various sizes and weights.1/
Gross weight of unit load (within range limits) |
Height of raised edge of base/pallet (within range limits) |
Pounds |
Inches |
Below - 600 |
L/2.7+6 |
600 - 3,000 |
L/8+6 |
Above - 3,000 |
L/16+6 |
NOTE: 1/ L is defined as the length in inches of the pallet/skid edge which is perpendicular to the raised edge. Drop height should be calculated to the nearest ΒΌ inch. |
|
(2) The test shall be applied once to each base edge of the unit load. If the size of the unit load and the location of the center of gravity are such that the drop cannot be made from the determined height, the greatest safe attainable height shall be substituted.
c. Rejection criteria.
(1) Structural damage to the unit load, which would result in either spilling of the contents or failure of the unit load during subsequent handling tests, will be cause for rejection. There should be no evidence of a substantial amount of shifting of the contents within the unit load that would create conditions likely to cause damage during shipment, storage, or handling. A substantial amount of shifting shall be determined by measuring the relative displacement of packages relative to other packages or relative to the pallet/skid. If the relative shifting/displacement exceeds 2 inches, the unit load is unacceptable.
H.5.4 Mechanical handling test. a. Purpose.
(1) To prove the ability of the unit load to be adequately handled on all sides (4-way) by conventional
forklift truck.
(2) To prove the ability of the unit load to be adequately handled by pallet truck (if deemed necessary for expected handling conditions).
b. Procedure.
(1) The unit load shall be lifted clear of the ground by a forklift truck of suitable size and capacity and transported in the level or back-tilt position for a distance of at least 100 feet. Part of the path, which the forklift truck traverses, should simulate ramps, dock plates, or whatever obstacles that would actually be encountered during the expected handling cycles. For this purpose, a typical hazard course for forklifts, as delineated by figure 1, may be utilized. This test should be conducted with the unit load lifted from each unique direction (i.e., both sideways and endways for most unit loads, and from all sides of unit loads with an offset center of gravity). If two-high or higher unit load carries will be permitted during any handling cycle, the unit loads shall also be tested in the stacked configuration.
Source: https://assist.dla.mil -- 4D3ownloaded: 2014-09-28T13:04Z Check the source to verify that this is the current version before use.
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