MIL-STD-1660A APPENDIX G
G.5.3.2 Sling handling with attachments.
G.5.3.2.1 Two-place attachment. Attach slings to two hoisting attachment provisions (lift rings, eyes, lugs, or other devices), one on each side or each end, so that the specimen will remain upright when hoisted. The length of the slings shall be such that when lifting they form angles between 20 degrees and 25 degrees with a horizontal plane (see figure G-2, view A). Lift the specimen clear of the floor and hold it suspended for not less than 2 minutes. Observe carefully for any indications of inadequacies of the specimen. Record observations and let the specimen down again. Repeat with other hoisting attachment provisions until each has been tested. If the specimen has only one attachment provision, attach only one sling to hold the specimen suspended for 2 minutes.
G.5.3.2.2 One-place attachment. If more than one attachment point is provided, remove the superimposed load, if any, from the specimen. Attach one sling to one lifting attachment provision, and lift the specimen clear of the ground (see figure G-2, view B). Observe for any indications of inadequacies of the specimen. Record observations and lower the specimen to the ground. Repeat with each lifting attachment point provided on the specimen.
G.5.4 Hoisting with grabs. (see figure G-3) Align the grabs on opposite sides or ends of the specimen above its center of balance. Adjust the grab operating chain or cable so that while the specimen is suspended, the grab pressure normal to the surface of the unit load will be about 1.2 times the specimen's weight. (For an operating line extending continuously from the hoist attachment downward to a pulley on one grab and then horizontally to a pulley on the other grab and then upward to the hoist attachment, the required pressure will result when the inclined portion of the line forms 45-degree angles (±5 degrees) to the horizontal. For an operating line extending from one grab up to the hoist attachment and then down to the other grab (not horizontally between the grabs), the required pressure will result when the inclined portions of the line form angles of 22½±2½degrees with a horizontal plane.)
Connect the hoist to the lifting point of the grab operating line and slowly lift. If the specimen tilts excessively upon lifting, lower it and relocate the grabs and the lifting point, if necessary, to align with the center of gravity of the specimen. Hoist the specimen clear of the floor, hold it suspended for 2 minutes, and return it to the floor. Observe for any evidence of inadequacy or damage to the container or unit load, or deflection of the container or unit load
that might cause damage or displacement of contents. A record shall be made of observations.
G.5.5 Pushing. Position the vehicle to abut the end of the specimen near the floor. If a forklift truck is used, the mast shall be vertical or at a slight back-tilt, and the forks shall extend beneath the specimen but shall not support it. Operate the truck to push the specimen along a hard, dry pavement a distance of 35 feet in about 85 seconds at a uniform speed, observing the specimen for any inadequacies or damage. Record observations. Move the vehicle to abut the side of the specimen near the floor and move the specimen sidewise over the same distance.
Record observations. When specified (see 6.2), the pushing test shall be repeated with one end of the unit load lifted off the ground about 6 inches by the tips of the forks inserted between the skids. The strength of the unit load structure as well as the skids, shall survive the test without failure or permanent deformation.
G.5.6 Towing. Attach a sling to the towline attachment fittings at one end, and connect with a towing vehicle
at a height not greater than the fittings. If no fittings are provided, use a sling- or gravity-type grab at the base of the specimen for attaching the towline, or some other feasible arrangement may be devised. Operate the vehicle to tow the specimens along a hard, dry pavement a distance of 100 feet in about 23 seconds at a uniform speed (normal walking speed), observing the specimen for any inadequacies or damage. Record observations and the method of attaching the towline. Then reattach the towline and tow the specimen sidewise over the same distance. Record observations. When specified (see 6.2), the towing test shall be repeated with one end of the unit load lifted off the ground about 6 inches by the tips of the forks inserted between the skids. The strength of the unit load structure, as well as the skids, shall survive the test without failure or permanent deformation.
Source: https://assist.dla.mil -- 3D6ownloaded: 2014-09-28T13:04Z Check the source to verify that this is the current version before use.
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